1. No category

North Eastern Regional Power Committee
Agenda
For
34th PCC Sub-Committee Meeting
Time of meeting : 10:00 Hrs.
Date of meeting : 16th June, 2015 (Tuesday)
Venue
: “Hotel Nandan”, Guwahati.
A.
CONFIRMATION
OF
MINUTES
CONFIRMATION OF MINUTES OF 33rd MEETING OF PROTECTION SUBCOMMITTEE OF NERPC.
The minutes of 33rd meeting of Protection Sub-committee held on 19th May, 2015
at Guwahati were circulated vide letter No. NERPC/SE (O)/PCC/2015/4520-4555
dated 04th June, 2015.
No observations or comments were received from the constituents. The Subcommittee may discuss & confirm minutes of 33rd PCCM of NERPC.
ITEMS
A.1
FOR
DISCUSSION
Implementation of 3-phase
Auto Reclosure Scheme in all lines
connected to Khandong and Kopili HEP:
For reliable operation of Power system it is required to implement 3-Phase Auto
Reclosure Scheme in all the 132kV lines connected to Kopili and Khandong HEP of
NEEPCO. The lists of such lines are:
a) 132kV Khandong – Umrangso - Haflong
b) 132kV Kopili – Khandong # 1
During 32nd PCC meeting, the sub-committee decided that at Khandong end it
should be kept as check synchronization mode and at Khilehriat (PG) end it
should be made as dead line charging mode. The Sub-committee requested NERTS
and NEEPCO to co-ordinate amongst them and implement the 3-Phase Autoreclosure at the earliest.
Agenda for 34th PCC Meeting held on 16.06.2015
During 33rd PCC meeting, the sub-committee requested Assam, NERTS & NEEPCO
to co-ordinate amongst them and implement the 3-Phase Auto-reclosure by
15.06.15 and the status should be intimated in the next PCC meeting. Assam,
NERTS and NEEPCO agreed.
Assam/NEEPCO/NERTS may kindly intimate the status.
A.2
Implementation of 3-Phase Auto Reclosure Scheme of Radially fed
132kV Lines connected to Ranganadi HEP:
At present, the power flows to Nirjuli, Gohpur and Ziro radially from Ranganadi
HEP and any transient fault in line causes undesirable outages. Hence, to avoid
outages during transient fault it is essential to implement 3- Phase Dead Line
charging of following 132kV Lines.
a) 132kV Ranganadi – Nirjuli Line (Dead Line Charging at RHEP)
b) 132kV Nirjuli – Gohpur Line (Dead Line Charging at Nirjuli)
c) 132kV Ranganadi – Ziro Line (Dead Line Charging at RHEP)
During 33rd PCC meeting, EE, SLDC, Ar. Pradesh requested NEEPCO to intimate
their plan atleast one week in advance so that necessary action can be taken by
them.
The sub-committee requested NEEPCO to take up the matter with Ar. Pradesh so
that SPAR on above lines could be completed.
NEEPCO/Ar. Pradesh may kindly intimate the status.
A.3
Implementation of the recommendations of the Protection Audit:
As per Sl. no 9.1.1 & 9.1.4 of Report on Enquiry Committee on Grid Disturbance
in Northern Region on 30th July 2012 and in Northern, Eastern & North-Eastern
Region on 31st July 2012, thorough Third Party protection audit needs to be
carried out periodically along with independent audit of Fault Recording
Instruments.
As decided in 32nd PCCM, all the constituents are requested to furnish the data as
per check list of Task force in Annexure A.3(II) and the data as per format of
NERPC in Annexure A.3(I) for future reference.
AEGCL have furnished check list of protection objects. AEGCL are requested to
confirm whether these protection objects are applicable for all transmission
elements owned by them and also requested to furnish details as per format of
NERPC. All the other constituents are requested to furnish the details as early as
possible.
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Agenda for 34th PCC Meeting held on 16.06.2015
During 32nd PCC meeting, the sub-committee had also requested NERPC to hold
the special meeting to finalize the standard scheduling of O&M comprising of
NERLDC, NERTS, NERPC, NEEPCO, Assam & Meghalaya etc., at the earliest so
that the best O&M practices can be evolved in the region.
During 33rd PCC meeting, SE(O) informed that since there were other issues to be
discussed along with above agenda, the meeting could not be held in May, 2015.
The above meeting as suggested by the Sub-committee will be conducted soon by
NERPC.
DGM (SO-II), NERLDC informed that information have been received from AEGCL
(as per format II & Details of Protection Audit not received as per format-I), OTPC
(as per format II), NEEPCO (Khandong & Kopili as per format-I). He requested the
remaining constituents to submit at the earliest.
The sub-committee requested NERPC to write a letter to remaining constituents
(i.e. NERTS (POWERGRID), NTPC, NHPC, NEEPCO (except Khandong & Kopili),
AEGCL (for Details of Protection Audit as per format II), APGCL, MePTCL,
MePGCL, MSPCL, DOP, Mizoram, DOP, Nagaland, DOP, Arunachal Pradesh,
TSECL) to furnish the data as per check list of Task Force in Annexure – A.3 (II)
and well as the data as per format of NERPC in Annexure A.3 (I) at the earliest.
NERPC has written to above constituents to furnish the data as per Annexure –
A.3 (II) as well as Annexure – A.3 (I) and the reply is awaited.
Constituents may kindly intimate the status.
A.4
Standardization of Disturbance Recorder Channels:
Disturbance Recorders on Transmission elements are necessary for post
disturbance analysis, and identification & rectification of any protection maloperation. As per CBIP’s manual on Protection of Generators, GT, Transformers
and Networks, it is recommended to have minimum 8(eight) analog signals and
16(sixteen) binary signals per bay or circuit. Also, it should have a minimum of 5
sec of total recording time, minimum pre-fault recording time of 100 msec and
minimum post-fault recording time of 1000 msec.
During 33rd PCC meeting, Manager (AM), NERTS informed that standardization for
transformers & reactors are being finalized by their Corporate Centre for the whole
country, the report would be circulated as soon as it is received from them. He also
informed that suggestion by GM, NERLDC for NER States have already been
communicated by them. He stated that as soon as the report is received they will
intimate to NERPC/NERLDC accordingly.
NERTS may kindly intimate the current status.
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Agenda for 34th PCC Meeting held on 16.06.2015
A.5
Submission of formats for charging/first time synchronization of new
elements:
Information related to charging/first time synchronization of new elements/units
is to be furnished to NERLDC (two month in advance). All the activities related to
charging/first time synchronization of new elements are to be completed before
charging/first time synchronization of new elements. The technical data of the
elements are also necessary for preparation of Base Case for system study for NER
system.
During the 108th OCC meeting, SE(O) informed that nomination from NTPC was
received only recently, the above meeting could not be conducted. Now since the
complete list of nodal officers is received, NERPC will arrange the meeting at the
earliest.
NERPC may kindly intimate the current status about holding the special
meeting comprising of nodal officers of constituents, NERLDC & NERPC as
suggested by the Sub-committee.
A.6
Reporting of failure of equipment/towers of transmission lines to
Standing Committee of Experts:
CEA vide letter dated 04.02.2015 has intimated that as per Section 73 of
Electricity Act 2003, CEA is to carry out investigation of failure of
substations/generating stations and failure of transmission line towers.
Accordingly two Standing Committees have been constituted taking representation
from academic institutes, Research Institutes like CPRI and utility to investigate
the cause of failures:
(a) Standing Committee of Experts to investigate the failure of Transmission line
towers of 220 kV and above voltage level of Power utilities.
(b) Standing Committee of Experts to investigate the failure of Equipments of
220 kV and above substations/Generating stations of power utilities.
In view of above, it is requested that all utilities may please report the incidences
of failure immediately after occurrence of such failure to Chief Engineer (SE&TD),
CEA with copy to NERPC.
The format for reporting the first hand information about the failure of equipment
in substations/generating stations and failure of transmission line towers are
attached at Annexure – A.6
During 32nd PCC meeting, Meghalaya representative stated that Recent failure of
one 63 MVAR reactor at 400 kV S/S Byrnihat of Me.ECL would be sent to CEA for
investigation as directed above as suggested by SE(O) to CEA within one week.
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Agenda for 34th PCC Meeting held on 16.06.2015
During 33rd PCC meeting, Meghalaya representative requested NERPC to take up
the matter with Director (Trans) regarding failure of above equipment at Byrnihat.
The Sub-committee requested NERPC to write to Director (Transmission), Me.
PTCL regarding above failure of important reactor at Byrnihat.
NERPC has written to Director (T), Me. PTCL and the reply is awaited.
Meghalaya may kindly intimate the status.
A.7 Status of R&M Implementation of NER from PSDF:
The Sub-committee requested all the constituents to intimate the status of
progress to NERPC regularly so that the same could be intimated to CERC.
Latest available status is enclosed at Annexure - A.7.
Constituents may kindly intimate the status.
A.8
Furnishing Protection Details of Transmission Lines, Transformers,
Reactors and Bus Bars:
a. Transmission Line
As per section 43.4.c (Schedule V) of Technical Standards for construction of
Electrical Plants and Electric Lines Regulation, 2010, Protection system of
400 kV lines consists of Main I, Main II, DEF, Two Stage Over Voltage, Auto
Reclosing and Carrier Aided Inter Tripping. Protection system of 220 kV lines
consists of Main I, Main II/Over Current & DEF, Auto Reclosing and Carrier
Aided Inter Tripping. Protection system of 132 kV lines consists of Main I,
Over Current & DEF, Auto Reclosing and Carrier Aided Inter Tripping.
AEGCL, MSPCL, MePTCL, P&E, Mizoram, POWERGRID, NEEPCO (only
AGBPP, Ranganadi HEP, Doyang HEP & AGTPP), NHPC & TSECL has
furnished the information.
DoP, Arunachal Pradesh, DoP, Nagaland, NEEPCO (for Khandong, Kopili
& Kopili Stg II), OTPC (for 132 kV lines) are requested to furnish
Protection Details of Transmission Lines as per enclosed format in
Annexure - A.8 (I&II).
b. Transformer
As per section 43.4.c (Schedule V) of Technical Standards for construction of
Electrical Plants and Electric Lines Regulation, 2010, Protection system of
Transformer consists of Differential Protection, Over Flux Protection, REF
Protection, Backup Directional Over Current and Earth Fault Protection (HV
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Agenda for 34th PCC Meeting held on 16.06.2015
& LV side)/Impedance Protection, Buchholz, WTI, OTI, MOG, OSR for OLTC,
PRD, SA, Tertiary Winding Protection, Over Load Alarm.
AEGCL, MSPCL, MePTCL, P&E, Mizoram, POWERGRID, NEEPCO (only
AGBPP, Ranganadi HEP & AGTPP), NHPC, OTPC & TSECL has furnished
the information.
DoP, Arunachal Pradesh, DoP, Nagaland, NEEPCO (for Khandong, Kopili
& Kopili Stg II) are requested to furnish Protection Details of Transformer
as per format in Annexure–A.8 (I&II).
c. Reactor
As per section 43.4.c (Schedule V) of Technical Standards for construction of
Electrical Plants and Electric Lines Regulation, 2010, Protection system of
Reactor consists of Differential Protection, REF Protection, Backup Definite
Time Over Current and Earth Fault Protection/Impedance Protection,
Buchholz, WTI, OTI, MOG, SA.
AEGCL, MePTCL, NEEPCO (Rangaandi HEP), OTPC and POWERGRID have
furnished the information.
d. Bus Bar & LBB
As per section 43.4.c (Schedule V) of Technical Standards for construction of
Electrical Plants and Electric Lines Regulation, 2010, Bus Bar Protection and
Local Breaker Backup Protection are to be provided in 220 kV and above
voltage interconnecting sub-station and all generating station switchyards.
MePTCL, POWERGRID, NEEPCO (AGTPP, AGBPP & Ranganadi HEP), NHPC
& OTPC have furnished the information.
DoP, Arunachal Pradesh (Deomali), AEGCL (BTPS, Agia, Boko, Sarusajai,
Langpi, Samaguri, Jawaharnagar, Mariani, Tinsukia) & NEEPCO
(Kopili) are requested to furnish Bus Bar Protection and Local Breaker
Backup Protection as per enclosed format in Annexure-A.8 (I&II).
e. Bus Coupler
MSPCL, MePTCL, P&E, Mizoram, NEEPCO (only AGBPP, Ranganadi HEP
& AGTPP) & NHPC have furnished the information.
DoP, Arunachal Pradesh, AEGCL, DoP, Nagaland, POWERGRID, NEEPCO
(for Doyang, Khandong, Kopili & Kopili Stg II) & OTPC are requested to
furnish Bus Coupler Protection as per enclosed format in Annexure –A.8.
Protection System Database prepared based on information furnished by power
utilities of NER, which is attached at Annexure- A.8 (I&II). Power utilities of NER
are requested to check & validate the same.
After detailed deliberation in 32nd PCC meeting, the Sub-committee requested all
the constituents to furnish the above information to NERLDC latest by
10.05.2015.
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Agenda for 34th PCC Meeting held on 16.06.2015
Protection System Database prepared based on information furnished by power
utilities of NER, which is attached at Annexure - A.8). Power utilities of NER were
requested to check & validate the same.
During 33rd PCC meeting, the sub-committee requested NERPC to write a letter to
remaining constituents (i.e. AEGCL (for Bus Coupler (for all) & Bus Bar & LBB (for
BTPS, Agia, Boko, Sarusajai, Langpi, Samaguri, Jawaharnagar, Mariani,
Tinsukia)), DoP, Arunachal Pradesh (for Transmission Line, Transformer, Bus
Coupler, Bus Bar (for Deomali) & LBB (for Deomali), DOP, Nagaland (for
Transmission Line, Transformer, Bus Coupler), NEEPCO (Transmission line (for
Khandong & Kopili Stg-II), Transformer (for Kopili, Khandong & Kopili Stg-II), Bus
Bar & LBB (Kopili), Bus Coupler (Kopili, Khandong, Kopili St II), OTPC (for
Transmission Line,
Transformer, Reactor, Bus Copuler, Bus Bar & LBB),
POWEERGRID (for Bus Coupler) to furnish the data as per enclosed format in
Annexure – A.8 at the earliest.
NERPC has written letter to constituents above and the reply is awaited.
Concerned constituents may kindly intimate the current status.
A.9
Major Oscillations in NER:
NERLDC informed that during the month of May, 2015, there were persistent Low
Frequency Oscillations (LFOs) in NER Grid which led to tripping of some
generators in the Southern part of NER Grid around Khliehriat (Meghalaya)
system.
The oscillations occurred from 03:38:56.080 Hrs to 03:41:37.040 Hrs (around 3
minutes) and from around 03:42:33.440 Hrs to around 03:45:24.480 Hrs (around
3 minutes) on 29.05.15, & from around 22:56:30 Hrs to 22:58:15 Hrs on 31st May
2015.
In both the incidents, Low Frequency Modes in the system around 1.2 Hz and it’s
2nd Harmonic mode around 2.4 Hz was observed in the system, and the modes
have Poor / Negative damping.
In the 29th May incident, the oscillations started after fault in Meghalaya system
leading to tripping of 132 kV Khliehriat – Lumshnong line followed by oscillations
in Leshka HEP of MePGCL and Khandong HEP of NEEPCO. There was tripping of
Leshka units and Khandong units due to jerk in the system. The oscillations later
continued between units of Kopili HEP and Kopili St-II HEP.
In the 31st May incident, the oscillations started again after fault in Meghalaya
system leading to tripping of 132 kV Khliehriat (PG) – Khliehriat (MePTCL) I & II
lines followed by oscillations in Leshka HPP of MePGCL and Khandong HEP of
NEEPCO. There was tripping of Leshka units, Umiam St IV units and Khandong
unit due to jerk in the system. The oscillations later continued between units of
Kopili HEP and Kopili St-II HEP.
The Zone of oscillations in NER Grid is indicated below:
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Agenda for 34th PCC Meeting held on 16.06.2015
Oscillations were more prominent in Active power/ Frequency than in Voltage. It
thus suggests a lack of system stability as a whole. To address this issue, PSS
(Power System Stabilizers) may be installed in Myndtu Leshka Power Station to
enhance stability of the system.
Members may like to discuss.
A.9 Grid Incidences during May, 2015:
The following numbers of Grid Disturbances (GD) occurred during the period w.e.f
1st May, 2015 to 31st May, 2015 :-
Sl
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Control Area
1st
Palatana
AGBPP
AGTPP
Ranganadi
Kopili
Khandong
Doyang
Loktak
Arunachal Pradesh
Assam
Manipur
Meghalaya
Mizoram
Nagaland
Tripura
Grid Disturbance in nos.
May, 2015 to 31st
1st January, 2015 to 31st
May, 2015
May, 2015
1
5
0
1
1
4
2
3
0
1
0
1
0
2
0
4
2
22
4
25
6
34
6
9
2
5
1
13
1
3
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Agenda for 34th PCC Meeting held on 16.06.2015
Grid Disturbance in nos.
Sl
No
1
2
3
4
5
Category of GD
1st May, 2015 to 31st
May, 2015
1st January, 2015 to 31st
May, 2015
GD 1
GD 2
GD 3
GD 4
GD 5
Total
18
2
0
0
0
20
83
4
0
0
1
88
This is for information to the members. Remedial actions are to taken by the
concerned power utilities of NER
A.10 Root cause analysis of Grid Disturbances:
i.
Disturbance in Meghalaya system – Repeated tripping of 132 kV
Khliehriat (PG) – Khliehriat (Me. PTCL) – I & II lines:
During the month of May, 2015, there were 6 nos. of grid disturbances in
Khliehriat (including Lumshnong) area of Meghalaya.
W.e.f 01.06.15 to 08.06.15, there were 10 nos. events involving tripping of 132 kV
Khliehriat (PG) – Khliehriat (MePTCL) I & II lines, resulting in 9 nos. of grid
disturbances.
During the month of May15
a. At 1544 Hrs on 19.05.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines ( Line 1 : Khliehriat (PG) - DP, Z-III, R-B-E & Khliehriat (MePTCL)Not furnished and Line 2: Khliehriat (PG) - DP, Z-II, R-B-E & Khliehriat
(MePTCL)- Not furnished), 132 kV Khliehriat – Lumshnong line (Khliehriat
(MePTCL) - Earth Fault & Lumshnong - Not furnished) and 132 kV
Khliehriat – NEIGRIHMS line (Khliehriat (MePTCL) – DP, Z1, R-Y-B &
NEIGRIHMS – Not furnished) tripped. Due to tripping of these elements,
there was loss of load in Khliehriat area (including Lumshnong) of
Meghalaya System and loss of generation from Myndtu Leshka HPP. System
was restored progressively by 15:48 Hrs.
Load loss: 70 MW in Meghalaya
Generation Loss: 35 MW in Meghalaya (Leshka)
b. At 1043 Hrs on 23.05.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped ( Line 1 : Khliehriat (PG) - DP, Z-III, R-E & Khliehriat
(MePTCL)- Not furnished & Line II : Khliehriat (PG) - DP, Z-II, R-E &
Khliehriat (MePTCL)- Not furnished), 132 kV Khliehriat (PG) – Khandong I
line (Khliehriat (PG) - No tripping & Khandong (NEEPCO) - Earth Fault)
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Agenda for 34th PCC Meeting held on 16.06.2015
line tripped. Due to tripping of these elements, there was loss of load in
Khliehriat (including Lumshnong) area of Meghalaya.
Load loss: 57 MW in Meghalaya
c. At 1425 Hrs on 23.05.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped (Line 1: Khliehriat (PG) - DP, Z-III, B-E & Khliehriat
(MePTCL) - Not furnished) & Line 2: Khliehriat (PG) - DP, Z-II, Y-E &
Khliehriat (MePTCL) - Not furnished). Due to tripping of these elements,
there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya.
Load loss: 15 MW in Meghalaya
d. At 0336 Hrs on 29.05.15, 132 kV Khliehriat (MePTCL) – Lumshong line
(Khliehriat(MePTCL) - DP,Z-III,R-Y-B & Lumshong - Hand tripped) line
tripped. This resulted tripping of Unit 3 of Myndtu Leshka HPP of Meghalaya
and Units 1 and 2 of Khandong due to heavy jerk. There were Low
Frequency Oscillations (LFOs) of 1.2 Hz and 2.4 Hz modes in the system
having poor or negative damping. Oscillations were observed in Leshka,
Khandong, Kopili and Kopili St-II units.
Load loss: 24 MW in Meghalaya
Generation Loss: 84 MW [44 MW in Leshka and 40 MW Khandong)
e. At 0757 Hrs on 29.05.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines ( Line 1: Khliehriat (PG) - DP, Z-III, R-Y-B & Khliehriat (MePTCL)Not furnished & Line 2 : Khliehriat (PG) - DP, Z-II, R-Y-B & Khliehriat
(MePTCL)- Not furnished) tripped. Due to tripping of these elements, there
was loss of load in Khliehriat (including Lumshnong) area of Meghalaya and
loss of entire generation of Leshka HPP on Under-voltage.
Load loss: 73 MW in Meghalaya
Generation Loss: 105 MW in Meghalaya (Leshka)
f. At 2255 Hrs on 31.05.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines ( Line 1: Khliehriat (PG) - DP, Z-III, R-B-E & Khliehriat (MePTCL)Not furnished & Line 2 : Khliehriat (PG) - DP, Z-II, R-B-E & Khliehriat
(MePTCL)- Not furnished) tripped. Due to tripping of these elements, there
was loss of load in Khliehriat (including Lumshnong) area of Meghalaya, loss
of entire generation of Leshka HPP on Undervoltage and loss of entire
generation of Umiam StIV. There was Low Frequency Oscillations (LFOs) of
poor/negative damped modes around 1.2 Hz and 2.4 Hz only. Oscillations
were observed in Leshka, Khandong, Kopili and Kopili St-II units.
Load loss: 73 MW in Meghalaya
Generation Loss: 105 MW in Meghalaya (Leshka and Umiam St- IV)
Category as per CEA Standards: GD-I
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Agenda for 34th PCC Meeting held on 16.06.2015
W.e.f. 01.06.15 to 08.06.15
i. At 1857 Hrs on 01.06.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped ( Line I: Khliehriat (PG) - DP, Z-II, R-Y-E & Khliehriat
(MePTCL) - Not furnished and Line II: Khliehriat (PG) - DP, Z-III, R-Y-E
& Khliehriat (MePTCL)- Not furnished). Due to tripping of these elements,
there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya and generation loss in Leshka HEP.
Load loss: 88 MW in Meghalaya
Generation Loss: 122 MW in Meghalaya (Leshka)
ii. At 2356 Hrs on 01.06.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped (Line 1: Khliehriat (PG) - Not furnished & Khliehriat
(MePTCL) - Not furnished and Line 2: Khliehriat (PG) - Not furnished &
Khliehriat (MePTCL) - Not furnished). Due to tripping of these elements,
there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya and generation loss in Leshka HEP.
Load loss: 49 MW in Meghalaya
Generation Loss: 122 MW in Meghalaya (Leshka)
iii. At 2248 Hrs on 05.06.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped ( Line 1: Khliehriat (PG) - DP, Z-III, R-Y-B & Khliehriat
(MePTCL) - Not furnished and Line 2: Khliehriat (PG) - DP, Z-III, R-Y-B &
Khliehriat (MePTCL) - Not furnished). Due to tripping of these elements,
there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya and generation loss in Leshka HEP.
Load loss: 67 MW in Meghalaya
Generation Loss: 114 MW in Meghalaya (Leshka)
iv. At 1816 Hrs on 06.06.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped ( Line 1 : Khliehriat (PG) - DP, Z-III, R-Y-B & Khliehriat
(MePTCL) - Not furnished and Line 2 : Khliehriat (PG) - DP, Z-III, R-Y-B &
Khliehriat (MePTCL)- Not furnished). Due to tripping of these elements,
there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya and generation loss in Leshka HEP.
Load loss: 111 MW in Meghalaya
Generation Loss: 67 MW in Meghalaya (Leshka)
v. At 0056 Hrs on 08.06.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped ( Line 1: Khliehriat (PG) - DP, Z-III, R-Y-B & Khliehriat
(MePTCL)- Not furnished and Line 2: Khliehriat (PG) - DP, Z-III, R-Y-B &
Khliehriat (MePTCL)- Not furnished) tripped. Due to tripping of these
elements, there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya and generation loss in Leshka HEP. 132 kV Khandong –
Khliehriat (PG) I also tripped (Khandong – Not furnished & Khliehriat(PG)
– Not furnished).
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Agenda for 34th PCC Meeting held on 16.06.2015
Load loss: 39 MW in Meghalaya
Generation Loss: 121 MW in Meghalaya (Leshka)
vi. At 2222 Hrs on 08.06.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped ( Line 1: Khliehriat (PG) - DP, Z-III, R-Y-B & Khliehriat
(MePTCL)- Not furnished and Line 2: Khliehriat (PG) - DP, Z-II, R-Y-B &
Khliehriat (MePTCL)- Not furnished). Due to tripping of these elements,
there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya and generation loss in Leshka HEP.
Load loss: 58 MW in Meghalaya
Generation Loss: 121 MW in Meghalaya (Leshka)
vii. At 2317 Hrs on 08.06.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped ( Line 1: Khliehriat (PG) - DP, Z-III, R-Y-B & Khliehriat
(MePTCL)- Not furnished and Line 2: Khliehriat (PG) - DP, Z-III, R-Y-B &
Khliehriat (MePTCL)- Not furnished) tripped. Due to tripping of these
elements, there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya and generation loss in Leshka HEP. 132 kV Khandong –
Khliehriat (PG) I also tripped (Khandong – Not furnished & Khliehriat(PG)
– Over-current).
Load loss: 112 MW in Meghalaya
Generation Loss: 67 MW in Meghalaya (Leshka)
viii. At 0318 Hrs on 09.06.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped ( Line 1: Khliehriat (PG) - DP, Z-III, R-Y-B & Khliehriat
(MePTCL)- Not furnished and Line 2: Khliehriat (PG) - DP, Z-II, R-Y-B &
Khliehriat (MePTCL)- Not furnished) tripped. Due to tripping of these
elements, there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya and generation loss in Leshka HEP. 132 kV Khandong –
Khliehriat (PG) I also tripped (Khandong – Not furnished & Khliehriat(PG)
– Earth Fault).
Load loss: 77 MW in Meghalaya
Generation Loss: 44 MW in Meghalaya (Leshka)
ix. At 0508 Hrs on 09.06.15, 132 kV Khliehriat (PG) - Khliehriat (MePTCL) I &
II lines tripped ( Line 1: Khliehriat (PG) - DP, Z-III, Y-B-E & Khliehriat
(MePTCL)- Not furnished and Line 2: Khliehriat (PG) - DP, Z-II, Y-B-E &
Khliehriat (MePTCL)- Not furnished) tripped. Due to tripping of these
elements, there was loss of load in Khliehriat (including Lumshnong) area of
Meghalaya and generation loss in Leshka HEP. 132 kV Khandong –
Khliehriat (PG) I also tripped (Khandong – Not furnished & Khliehriat(PG)
– Earth Fault).
Load loss: 75 MW in Meghalaya
Generation Loss: 38 MW in Meghalaya (Leshka)
Category as per CEA Standards: GD-I (for events from Sl. No. a. to ix)
12
Agenda for 34th PCC Meeting held on 16.06.2015
x. At 0056 Hrs on 08.06.15, 132 kV Khandong – Khliehriat (PG) I tripped
(Khandong – Not furnished & Khliehriat(PG) – Not furnished).
Analysis of events:
Due to tripping of these elements, power supply to Khliehriat (including
Lumshnong) area of Meghalaya was interrupted repeatedly. It is suspected that
there may be un-cleared fault in Meghalaya system or delayed fault clearance. As a
result, several transmission lines tripped. In most of the cases, Leshka machines
tripped and in some of the case, machines of Umiam St IV & Khandong tripped.
The un-cleared faults may create oscillations in the system. It was observed that
there was oscillation of machines of Leshka along with machines of Khandong. As
a result, machines of Leshka and machines of Khandong tripped. Even after
tripping of these machines, the oscillations in the system was continued and
observed between machines of Kopili and machines of Kopili Stg-II until the mode
damping improves. Oscillations were more prominent in Active power/Frequency
rather than in Voltage. It thus suggests a lack of system stability as a whole. To
address this issue, PSS (Power System Stabilizers) may be installed in Leshka
Power Station to enhance stability of the system.
DR output at both ends of all lines tripped required for proper analysis of the
events.
Me. PTCL, Me. PGCL, NEEPCO & NERTS, POWERGRID may elaborate.
ii. Disturbance in AGTPP, Palatana and Tripura power system
a.
At 1526 Hrs on 29.05.15, due to tripping of 132 kV Agartala – Dhalabil
line, 132 kVBaramura – Jirania line, 132 kV AGTPP - Agartala I line (AGTPP
- DP, Z-III, R-E & Agartala - No tripping) & 132 kV AGTPP - Agartala II line
(AGTPP- DP, Z-III, R-E & Agartala - No tripping), power supply to Tripura
system was interrupted and all running units of AGTPP tripped (No
information from AGTPP regarding unit tripping). 132 kV Palatana Surajmani Nagar line & 132 kV Palatana – Udaipur line also tripped, Due to
tripping of 132 kV Palatana - Surajmani Nagar line & 132 kV Palatana –
Udaipur line, Palatana Module II tripped (Due to tripping of Gas Booster
Compressor). Tripping of Palatana machines triggered SPS I at Silchar with
load relief of 70 MW at South Assam.
Generation loss: 469 MW [Palatana = 335 MW, AGTPP = 76 MW]
Load Loss: 70 MW in Tripura
Category as per CEA Standards: GD-II
Analysis of events:
Due to tripping of all outgoing feeders of AGTPP, all the running units of AGTPP
tripped. Due to tripping of 132 kV Palatana – Udaipur line and 132 kV Palatana –
Surjamaninagar line, auxiliary system of Palatana Module II failed and
subsequently Gas Booster Compressor (GBC) of Palatana Module II tripped.
13
Agenda for 34th PCC Meeting held on 16.06.2015
In this event on 29-May-2015, the 400/132 kV, 125 MVA ICT at Palatana was out
of service. Since supply to Auxiliaries of Palatana units are taken from 132 kV Grid
of Tripura, outage of 132 kV Palatana – Udaipur S/C and 132 kV Palatana –
Surjamaninagar S/C led to failure of supply to Auxiliary system of Palatana units
and hence tripping of Palatana units. If another 400/132 kV ICT at Palatana were
in place, this type of incident could have been averted. This transformer would
also ensure enhanced reliability of supply and also satisfied the N-1 contingency
criteria as specified in CEA’s Manual on Transmission Planning Criteria, Jan’13.
As an alternative arrangement, in such cases, if UATs at Palatana are of sufficient
capacity, the Auxiliary supply failure would not have occurred. OTPC, Palatana
may explore the provision of enhancement of UAT to sufficient capacity.
DR output at both ends required for proper analysis of the events.
NEEPCO, TSECL, OTPC & NERTS, POWERGRID may elaborate.
iii. Disturbance in Manipur system
a. At 1658 Hrs on 01.05.15, due to tripping of 132 kV Imphal(PG) - Imphal I
& II lines (Line I: (Imphal (PG) - Earth fault & Imphal (MSPCL) - Not
furnished & Line II : Imphal (PG) - Earth fault & Imphal (MSPCL) -Not
furnished), power supply to Imphal (Capital) area of Manipur interrupted.
Load loss: 63 MW in Manipur.
b. At 0906 Hrs on 12.05.15, due to tripping of 132 kV Loktak- Ningthoukhong
line (Loktak - Earth Fault & Ningthoukhong - Not furnished) & 132 kV
Ningthoukhong - Imphal (PG) line (Ningthoukhong - Not furnished &
Imphal (PG) - Earth Fault), power supply to Ningthoukong area of Manipur
interrupted.
Load loss: 28 MW in Manipur.
c. At 1124 Hrs on 19.05.15, due to tripping of 132 kV Imphal (PG) - Imphal
(MSPCL) I & II lines (Line I: Imphal (PG) - Earth fault & Imphal (MSPCL) Not furnished and Line II Imphal (PG) - Earth fault & Imphal (MSPCL) –
Not furnished), power supply to Imphal (Capital) area of Manipur
interrupted.
Load loss: 76 MW in Manipur.
d. At 0137 Hrs on 21.05.15, due to tripping of 132 kV Imphal (PG) - Imphal
(MSPCL) I & II lines (Line I : Imphal (PG) - Earth fault & Imphal (MSPCL) Not furnished) & Line II: Imphal (PG)- Earth fault & Imphal (MSPCL)-Not
furnished), power supply to Imphal (Capital) area of Manipur interrupted.
Load loss: 30 MW in Manipur.
14
Agenda for 34th PCC Meeting held on 16.06.2015
e. At 1414 Hrs on 23.05.15, due to tripping of 132 kV Imphal (PG) - Imphal
(MSPCL) I & II lines (Line1: Imphal (PG) - Earth fault & Imphal (MSPCL) Not furnished) & Line II: Imphal (PG) - Earth fault & Imphal (MSPCL) Not furnished), power supply to Imphal (Capital) area of Manipur
interrupted.
Load loss: 40 MW in Manipur.
f.
At 1714 Hrs on 23.05.15, due to tripping of 132 kV Imphal (PG) - Imphal
(MSPCL) I & II lines (Line 1: Imphal (PG) - Earth fault & Imphal (MSPCL) Not furnished & Line 2: Imphal (PG) - Earth fault & Imphal (MSPCL) - Not
furnished), power supply to Imphal (Capital) area of Manipur interrupted.
Load loss: 44 MW in Manipur.
Category as per CEA Standards: GD-I
Analysis of events:
It is suspected that there may be fault in MSPCL system in these cases. DR output
at both ends of all lines tripped required for proper analysis of the events.
NHPC, MSPCL, & NERTS, POWERGRID may elaborate.
iv. Disturbance in Arunachal Pradesh and Gohpur area of Assam
a. At 1138 Hrs on 18.05.15, due to tripping of 400 kV Balipara - Ranganadi I
(Balipara (PG) – DP, Z-II, Y-B-E & Ranganadi (NEEPCO) – DP, Z-I, Y-B-E),
power supply to Ziro & Capital area of Arunachal Pradesh and Gohpur area
of Assam interrupted. There was also generation loss in Ranganadi HEP.
Power was extended to these areas through 400 kV Balipara- Ranganadi II
at 1210 Hrs on 18.05.15. 400 kV Balipara- Ranganadi II was kept open
w.e.f 0006 Hrs on 18.05.15 due to control bus voltage at Ranganadi.
Load loss: 60 MW in Arunachal Pradesh & Assam
Generation Loss: 110 MW at Ranganadi (NEEPCO)
Category as per CEA Standards: GD-II
b.
At 0008 Hrs on 25.05.15, due to tripping of 400 kV Balipara- Ranganadi I
& II lines ( Line 1: Balipara(PG) – Overvoltage & Ranganadi (NEEPCO) –
Overvoltage & Line 2 : Balipara (PG) – Overvoltage & Ranganadi
(NEEPCO) – Overvoltage) lines, power supply to Ziro & Capital area of
Arunachal Pradesh and Gohpur area of Assam interrupted.
Load loss: 60 MW in Arunachal Pradesh & Assam
Category as per CEA Standards: GD-I
15
Agenda for 34th PCC Meeting held on 16.06.2015
Analysis of Events:
DR outputs have been received from Ranganadi of above events. DR output from
Balipara (PG) has been received for the tripping of 400 kV Balipara – Ranganadi I
on 18th May 2015. DR output from Balipara (PG) in respect of tripping of lines on
25-May-2015 was not received.
Information from DR pertaining to 18th May 2015 tripping:
From the DR of Main-I at Balipara pertaining to 18th May 2015 case, a maximum
L-L voltage of 407 kV (RMS) can be observed while the extremism was at 575 kV.
From the DR of Main-II at Balipara pertaining to 18th May 2015 incident, a
maximum L-L voltage at around 407 kV (RMS) for duration of 287 milli-seconds
could be observed and the maximum instantaneous extremism was 575 kV.
From the DR of Main-I at Ranganadi pertaining to the 18th May 2015 incident, a
maximum L-L voltage of around 417 kV (RMS) for duration of 888 milli-seconds
could be observed and the maximum instantaneous extremism was 592 kV. Also,
from the DR, Main-2 operated signal is high (Main-II DR was, however, not
furnished to NERLDC).
Information from DR pertaining to 25th May 2015 tripping:
From the DR of Main-I at Ranganadi pertaining to the 25th May 2015 incident, a
maximum L-L voltage of around 445 kV (RMS) for a prolonged duration could be
observed and the maximum instantaneous extremism was 630 kV. However, from
the DR there is no operation of Circuit Breaker / Line opening that could be
observed.
DR files before or after the incident would be required, and from both ends
of the line for proper analysis. It is not clear when CB opening took place.
Any other item:
Date and Venue of next PCC
It is proposed to hold the 35th PCC meeting of NERPC on second week of July,
2015. The exact venue will be intimated in due course.
*******
16
Annexure – A.6
Format for intimating the failure of Transmission line Towers
1. Name of Transmission line with voltage level:
2. Length of line (km):
3. Type of configuration:
[(S/C, D/C, S/C strung on D/C towers,
narrow base etc.)]
4. Number of Towers and Type of Towers failed:
[suspension/ tension/ dead end/ special tower/
river crossing tower/ Powerline crossing/ Railway crossing etc.,
with/ without extension
(indicate the type & length of extension)]
5. Tower location no. with reference to nearest substation (indicate name):
6. Name and size of conductor:
7. No. of sub-conductors per bundle and bundle spacing:
8. Number and size of Ground wire/ OPGW (if provided):
9. Type of insulators in use (Porcelain/ Glass/ Polymer):
10. Configuration of insulators (I/ V/ Y/ tension):
11. No. of insulators per string and No. of strings per phase:
12. Year of construction/ commissioning:
13. Executing Agency:
14. Weather condition on the date of failure:
15. Terrain Category
16. Wind Zone (1/2/3/4/5/6) and velocity of wind:
17. Details of earthing of tower (pipe type/ Counter poise):
18. Line designed as per IS: 802 (1977/1995/ any other code):
19. The agency who designed the line:
20. Any special consideration in design:
21. Date and time of occurrence/ discovery of failure:
22. Power flow in the line prior to failure:
23. Any missing member found before/ after failure of towers:
24. Condition of foundation after failure:
25. Brief description of failure:
[alongwith photographs( if available), other
related information like tower schedule,
newspaper clipping for cyclone/ wind storm etc.]
26. Probable cause of failure:
27. Details of previous failure of the line/ tower:
28. Whether line will be restored on ERS or Space tower will be used:
29. Likely date of restoration:
30. Present Status:
31. Details of any Test carried out after failure:
32. Any other relevant information:
Profoma for details of equipment failure
(Information should be in detail and test reports should be furnished)
1. Name of Substation
:
2. Utility/ Owner of substation
:
3. Faulty Equipment
:
4. Rating
:
5. Make
:
6. Sr. No.
:
7. Year of manufacturing
:
8. Year of commissioning
:
9. Date and time of occurrence/ discovery of fault :
10. Fault discovered during
(Operation/ maintenance)
:
11. Present condition of equipment
:
12. Details of previous maintenance
:
13. Details of previous failure
:
14. Sequence of events/ Description of fault
:
15. Details of Tests done after failure
:
16. Conclusion/ recommendation
:
Annexure – A.7
Rs. In Crore.
Funding Sought
by Entity
Quantum of funding
approved by Appraisal
Committee (AC)
Quantum of funding
approved by Monitoring
Committee (MC)
DoP, AP
DPR submitted to CEA/NLDCunder examination of CEA – now
it will be taken up in next meeting
of the techno-economic sub-group
33.45
-
-
Assam
AEGCL
Scheme already approved by
Monitoring Committee – MoP
sanctioned awaited
382.48
299.37
299.37
Manipur
MSPCL
DPR to be submitted
-
-
-
Me. PTCL
Scheme already approved by
Appraisal Committee & approval
by Monitoring Committee is
awaited
102.8
69.19 and
recommended to MC
-
Me. PGCL
DPR submitted to CEA/NLDCunder examination of CEA – now
it will be taken up in next meeting
of the techno-economic sub-group
48.16
-
-
Mizoram
DoP, Mizoram
Revised DPR submitted to
CEA/NLDC- under examination of
CEA – now it will be taken up in
next meeting of the technoeconomic sub-group
31.38
-
-
Nagaland
DoP, Nagaland
Scheme already approved by
Monitoring Committee – MoP
sanctioned awaited
39.96
39.96
39.96
TSECL
Revised DPR submitted to
CEA/NLDC- under examination of
CEA – now it will be taken up in
next meeting of the technoeconomic sub-group
-
State
Name of Entity
Status
Ar. Pradesh
Meghalaya
Tripura
Annexure I
132 kV Transmission Line Protection Details
Protection Details
Sl.
No.
Name of Line
Main I
Charged End specified Protection
Voltage
for
exists (Type
in kV
Protection of Relay and
Make)
(Yes/No)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
1. Owner of Line : POWERGRID
Note :1) Main-I Protection indicates Distance Protection
2) Type of Relay indicates it's operational mechanism - Numerical / Static / Electro-mechanical
3) List of inbuilt features of Numerical Relays are also to be furnished alongwith this format
Fault
Locator
exists
(Yes / No)
Annexure I
220 kV Transmission Line Protection Details
Protection Details
Sl.
No.
Name of Line
Data Recording System Details
Directional
Auto
Main
II
Instantaneous
Event
End
Main I
Two stage Reclosing Carrier
Power
Charged
Definite
Number of Number of
Logger /
specified Protection Protection
Over(Single
aided
Swing
Pole
Disturbance
Fault
Voltage
exists
Minimum
Core used Core used
Sequential
for
exists (Type
Voltage
Phase /
InterBlocking Discrepancy
Recorder
Locator
in kV
(Type of Time(IDMT)
for CT & for CT &
Event
Protection
of Relay
Protection
Three
tripping Feature Relay exists
exists
exists
Relay and type Earth
VT, used VT, used for
Recorder
and Make)
exists
Phase)
exists
exists
(Yes/No)
(Yes/No)
(Yes/No)
Make)
Fault Relay
for Main I
Main II
exists
(Yes/No)
(Yes/No)
exists
(Yes/No) (Yes/No)
(Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
1. Owner of Line :
Note :1) Main-I Protection indicates Distance Protection
2) Main-II Protection indicates one of Distance Protection / Directional Comparison Protection / Phase Segregated Line Differential protection
3) Type of Relay indicates it's operational mechanism - Numerical / Static / Electro-mechanical
4) List of inbuilt features of Numerical Relays are also to be furnished alongwith
Annexure I
400 kV Transmission Line Protection Details
Protection Details
Sl.
No.
Name of Line
Directional
Auto
Main II
Main I
Instantaneous Two stage Reclosing
End
Protection
Carrier
Charged
Protection
Definite
Over(Single
specified
exists
aided
InterVoltage
exists (Type
Minimum
Voltage
Phase /
for
(Type of
tripping
in kV
Three
Protection of Relay and Relay and Time(IDMT) Protection
exists
Make)
type Earth
exists
Phase)
Make)
(Yes/No)
(Yes/No)
Fault Relay
(Yes/No)
exists
(Yes/No)
exists (Yes/No)
(Yes/No)
Data Recording System Details
Power
Number
Swing
Pole
of Core
Blocking Discrepancy used for
Feature Relay exists CT & VT,
exists
(Yes / No)
used for
(Yes/No)
Main I
1. Owner of Line : POWERGRID
Note :1) Main-I Protection indicates Distance Protection
2) Main-II Protection indicates one of Distance Protection / Directional Comparison Protection / Phase Segregated Line Differential protection
3) Type of Relay indicates it's operational mechanism - Numerical / Static / Electro-mechanical
4) List of inbuilt features of Numerical Relays are also to be furnished alongwith
Event
Number of
Logger /
Core used Disturbance
Fault
Sequential
for CT & Recorder
Locator
Event
VT, used
exists
exists
Recorder
for Main
(Yes/No)
(Yes/No)
exists
II
(Yes/No)
Annexure I
Transformer Protection Details
Sl.
No.
Name of
Transformer
Directional
MOG
Over
Tertiary
Differential
REF
Over
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
Fluxing
PRD
Winding
LV side/ Protection
Protection Current Protection Operation Protection Protection oil level OLTC
SA exists
Alarm
Protection
exists
Protection
HV side
exits
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
exits
(Yes/No)
exists
(Yes/No)
(Yes/No)
exits
(Yes/No) (Yes/No) (Yes/No) (Yes/No)
exists (Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
1. Owner of Transformer :
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
Note : 1. REF : Restricted Earth Fault, 2. WTI : Winding Temperature Indicator., 3. OTI : Oil Temperature Indicator)
4. MOG : Magnetic Oil Gauge, 5. OSR : Oil Surge Relay, 6. OLTC : On Load Tap Changer
7. PRD : Pressure Relieve Device, 8. SA : Surge Arrestor
9. List of inbuilt features of Numerical Relays are also to be furnished
Annexure I
Reactor Protection Details
Sl.
No.
Name of Line Reactor/
Bus Reactor/ Tertiary
Reactor
Differential
Protection
exists
(Yes/No)
REF
Definite Time Earth Fault Buchholz
WTI
OTI
MOG with
Protection Over Current
Protection Operation Protection Protection low oil level SA exists
exists
Protection exists
exists
exists
exists
exists
alarm exists (Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
1. Owner of Reactor :
Note : 1. REF : Restricted Earth Fault, 2. WTI : Winding Temperature Indicator., 3. OTI : Oil Temperature Indicator)
4. MOG : Magnetic Oil Gauge, 5. SA : Surge Arrestor
6. List of inbuilt features of Numerical Relays are also to be furnished alongwith this format
Annexure I
Bus Bar & Local Breaker Backup(LBB) Protection Details
Sl.No.
Name of Bus Bar
Bus Bar Protection LBB Protection exists
exists (Yes/No)
(Yes/No)
1. Owner of Bus Bar/LBB
Note : 1. List of inbuilt features of Numerical Relays are also to be furnished alongwith this
Annexure -A.9 (I)
Bus Coupler Protection Details
Sl.No.
Name of Bus Coupler
Non directional O/C Non directional E/F
Protection exists
Protection exists
(Yes/No)
(Yes/No)
1. Owner of Bus Coupler
Note : 1. List of inbuilt features of Numerical Relays are also to be furnished alongwith this
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
End specified for
Protection
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
1. Owner of Line/End: Assam, AEGCL
Balipara
1
Balipara-Depota
132
Depota
Balipara
2
Balipara-Ghoramari
132
Ghoramari
Depota
3
Depota-Ghoramari
132
Ghoramari
Balipara
4
Balipara- Gohpur
132
Gohpur
Barnagar
5
Barnagar-Dhaligaon
132
Dhaligaon
Barnagar
6
Barnagar-Rangia
132
Rangia
B.Chariali
7
B.Chariali-Depota
132
Depota
B.Chariali
8
B.Chariali-Gohpur
132
Gohpur
Yes (7SA
SIEMENS)
Yes (7SA
SIEMENS)
Yes (7SA
SIEMENS)
Yes (7SA61
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA61
SIEMENS)
Yes (7SA
SIEMENS)
Yes (REL670
ABB)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(SEL321)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
9
Depota-Rowta I
End specified for
Protection
Depota
132
Rowta I
Depota
10
Depota-Rowta II
132
Rowta II
Dhaligaon
11
Dhaligaon-APM
132
APM
12
Dhaligaon-BRPL
132
Dhaligaon
BRPL
Dhaligaon
13
Dhaligaon-Gosaigaon
132
Gossaigaon
Dhaligaon
14
Dhaligaon-Nailbari
132
Nalbari
15
16
17
BTPS (Salakati)
BTPS (Salakati)Dhaligaon I
132
BTPS (Salakati)Dhaligaon II
132
Dhaligaon-Salakati I
132
Dhaligaon I
BTPS (Salakati)
Dhaligaon II
Dhaligaon
Salakati I
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
NoT KNoWN
Yes (7SA52
SIEMENS)
Yes (7SA61
SIEMENS)
Yes (7SA61
SIEMENS)
Yes (REL 670
ABB)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
18
Dhaligaon-Salakati II
132
19
Dibrugarh-Moran
132
End specified for
Protection
Dibrugarh-Behiating
132
Behiating
Moran
21
Moran-Behiating
132
Behiating
Dibrugarh
22
Dibrugarh-Tinsukia
132
Tinsukia
Garmur
23
Garmur-Bokakhat
132
Bokakhat
24
Gohpur-North Lakhimpur
I
132
25
Gohpur-North Lakhimpur
II
132
26
Dimapur (PG) - Bokajan
132
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Dhaligaon
Salakati II
Dibrugarh
Moran
Dibrugarh
20
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Yes (7SA52
SIEMENS)
Yes (7SA61
SIEMENS)
Yes (GRZ-100
TOSHIBA)
Yes (7SA61
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA61
SIEMENS)
Yes (GRZ-100
TOSHIBA)
Yes (7SA52
SIEMENS)
North Lakhimpur I Yes (D60 GE)
Gohpur
Yes (D60 GE)
North Lakhimpur II Yes (D60 GE)
Gohpur
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
Yes (IDMTL)
Yes (IDMTL)
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
1
1
1
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Dimapur (PG)
PGCIL
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Bokajan
Yes (P442
MICOM)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
End specified for
Protection
1. Owner of Line/End: Assam, AEGCL
27
28
Golaghat-Mariani
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Mariani
Yes (7SA52
SIEMENS)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132
Golaghat
Yes (GRZ-100
TOSHIBA)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132
Bokajan
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
Yes (IDMTL)
No
No
No
No
Yes
Yes
Yes
Yes
1
1
Yes
Yes
Yes
Yes
Yes
Yes
Yes(D60 GE)
Yes (7SA
SIEMENS)
Yes (7SA
SIEMENS)
NoT KNoWN
Yes (7SA
SIEMENS)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes(D60 GE)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132
132
Gauripur
30
Haflong - Lower Haflong
132
31
Kahilipara-Chandrapur
132
32
CTPS - Jagiroad
(Bagjhap)
132
33
Jagiroad (Bagjhap) HPC, Jagiroad
132
Nazira - Jorhat
132
Haflong
Lower Haflong
Kahilipara
Chandrapur
CTPS
Jagiroad (Bagjhap)
Jagiroad (Bagjhap)
HPC, Jagiroad
Nazira
34
Jorhat
Kahilipara
35
Kahilipara-Narengi
Fault
Locator
exists
(Yes / No)
Yes (GRZ-100
TOSHIBA)
Golaghat-Bokajan
Gossaingaon-Gauripur
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Golaghat
Gossaigaon
29
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
132
Narengi
Yes (7SA52
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(REL670
ABB)
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
36
Kahilipara-Rangia
End specified for
Protection
Kahilipara
132
Rangia
Kahilipara
37
Kahilipara-Sarusajai I
132
Sarusajai I
Kahilipara
38
Kahilipara-Sarusajai II
132
Sarusajai II
Kahilipara
39
Kahilipara-Sarusajai III
132
Sarusajai III
Kahilipara
40
Kahilipara-Sarusajai IV
132
Sarusajai IV
Kahilipara
41
Kahilipara-Sisugram
132
Sisugram
42
Dullavcherra Dharmanagar
132
Lakwa-Mariani
132
Dullavcherra
Dharmanagar
Lakwa
43
Mariani
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Yes (7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(RAZOA
ABB)
Yes (7SA
SIEMENS)
NoT KNoWN
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
44
Lakwa-Moran
End specified for
Protection
Lakwa
132
Moran
45
46
Srikona
Srikona Panchgram(Old)
132
Panchgram Panchgram(Old)
132
NTPS - LTPS (Maidela)
132
Panchgram(Old)
Panchgram
Panchgram(Old)
NTPS
47
LTPS (Maidela)
NTPS
48
NTPS - Sonari
132
Sonari
Sonari
49
Sonari- LTPS (Maidela)
132
LTPS (Maidela)
Lakwa
50
Lakwa-Namrup I
132
Namrup I
Lakwa
51
Lakwa-Namrup II
132
Namrup II
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Yes(7SA
SIEMENS)
Yes(GRZ-100
TOSHIBA)
Yes(REL670
ABB)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
52
Lakwa-Nazira
End specified for
Protection
Lakwa
132
Nazira
Mariani
53
Mariani-Garmur I
132
Garmur I
Mariani
54
Mariani-Garmur II
132
Garmur II
Nalbari
55
Nalbari-Rangia
132
Rangia
Namrup
56
Namrup-Tinsukia
132
Tinsukia
Nazira
57
Nazira-Betbari
132
Betbari
58
North Lakhimpur
North LakhimpurDhemaji
132
North Lakhimpur- Majuli
132
Dhemaji
North Lakhimpur
59
Majuli
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(REL670
ABB)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(GRZ-100
TOSHIBA)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
60
Narengi- Chandrapur
132
61
62
Pailapool-Srikona
Panchgram-Dullavchera
132
132
63
Panchgram-HPL
132
64
Panchgram-Srikona
132
65
66
Rangia (Chirakhundi) Nalbari (Sariahatali)
132
Rangia-Rowta
132
End specified for
Protection
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Yes(REL670
ABB)
Chandrapur
Yes(D60 GE)
Yes(7SA
Pailapool
SIEMENS)
Yes(REL670
Srikona
ABB)
Yes(7SA
Panchgram
SIEMENS)
Yes(7SA
Dullavcherra
SIEMENS)
Yes(7SA
Panchgram
SIEMENS)
HPL
NoT KNoWN
Yes(7SA
Panchgram
SIEMENS)
Yes(REL670
Srikona
ABB)
Rangia
Yes(7SA
(Chirakhundi)
SIEMENS)
Yes(REL670
Nalbari (Sariahatali)
ABB)
Yes(7SA
Rangia
SIEMENS)
Yes(7SA
Rowta
SIEMENS)
Narengi
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
67
Rangia-Sipajhar
End specified for
Protection
Rangia
132
Sipajhar
Rangia
68
Rangia-Sisugram
132
Sisugram
Samaguri
69
Samaguri- B.Chariali
132
B.Chariali
Samaguri
70
Samaguri- Khalaigaon
132
Khalaigaon
Samaguri
71
Samaguri-S.Dev Nagar I
132
S.Dev Nagar I
Diphu
72
Diphu-S.DevNagar
132
S.Dev Nagar
Sipajahar
73
Sipajhar-Rowta
132
Rowta
Tinsukia
74
Tinsukia-Margherita I
132
Margherita I
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Yes(7SA
SIEMENS)
Yes(REL670
ABB)
Yes(7SA
SIEMENS)
Yes(RAZOA
ABB)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(P442
MICOM)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(GRZ-100
TOSHIBA)
Yes(P442
MICOM)
Yes(REL670
ABB)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
75
Tinsukia-Margherita II
End specified for
Protection
Tinsukia
132
Margherita II
76
Nalkata-Gohpur I
132
77
Nalkata-Gohpur II
132
Dispur-KHP
132
KHP
79
Dispur-Chandrapur
132
80
Bokajan-Dimapur
132
81
Chandrapur-Bagjap
132
82
LTPS (Maidela) - Nazira
I
132
LTPS (Maidela) - Nazira
II
132
83
84
85
Dispur
Chandrapur
Bokajan
Dimapur
Chandrapur
Bagjap
LTPS (Maidela)
Nazira I
LTPS (Maidela)
Nazira II
Sankardev Nagar (Lanka)
- Diphu
132
Sankardev Nagar (Lanka)
- TELCOM
132
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Nalkata
Gohpur I
Nalkata
Gohpur II
Dispur
78
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Sankardev Nagar
(Lanka)
Yes(P442
MICOM)
Yes(7SA
SIEMENS)
Yes(P442
MICOM)
Yes(D60 GE)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes(P442
MICOM)
Diphu
Yes(GRZ-100
TOSHIBA)
Sankardev Nagar
(Lanka)
TELCOM
Yes(P442
MICOM)
Not KNown
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
End specified for
Protection
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
1. Owner of Line/End: MSPCL
Assam, AEGCL
2.
(Manipur)
1
2
3
4
5
6
7
8
Ningthoukhong Churanchandpur I
132
Ningthoukhong Churanchandpur II
132
Rengpang - Jiribam
132
Imphal(Manipur) Karong
Imphal(Manipur) Yaingangpokpi
Yaingangpokpi - Kongba
Kongba - Kakching
Kakching Churanchandpur
132
132
132
132
132
Ningthoukhong
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Churanchandpur
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Ningthoukhong
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Churanchandpur
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Rengpang
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Jiribam(Manipur)
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Imphal(Manipur)
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Karong
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Imphal(Manipur)
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Yaingangpokpi
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Yaingangpokpi
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Kongba
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Kongba
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Kakching
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Kakching
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
Churanchandpur
Yes
Yes
Yes
No
No
Yes
4&3
No
No
No
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
End specified for
Protection
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
1. Owner of Line/End: Meghalaya,
Assam, AEGCL
3.
MePTCL
1
Umiam St IV
(Nongkhyllem) - Umtru I
Umiam St IV
(Nongkhyllem)
132
Umtru
Umiam St IV
(Nongkhyllem)
2
Umiam St IV
(Nongkhyllem) - Umtru II
Umiam St III
(Kyrdemkulai) - Umtru I
Umiam St III
(Kyrdemkulai)
132
Umtru
4
Umiam St III
(Kyrdemkulai) - Umtru II
Umiam St III
(Kyrdemkulai)
132
Umtru
5
Umiam St III
(Kyrdemkulai) - Umiam
St I (Sumer) I
Yes,
Yes, REL670
REL670 &
& P127 Relay
P127 Relay
Yes,
REL670
Relay
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, ABB
Yes, Directional
make REL670,
P127, Areva make
Numerical
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes,
Yes, REL670
REL670 &
& P127 Relay
P127 Relay
Yes, Toshiba
make GRZ100,
Numerical
No
Yes, GRZ100
Relay
Yes, GRZ100
Relay
No
1
Yes, GRZ100
Relay
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes,
Yes, REL670
REL670 &
& P127 Relay
P127 Relay
Yes, Directional
JNP096, JVS make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, Toshiba
Yes, Directional
make GRZ100,
P127, Areva make
Numerical
No
Yes, GRZ100
Relay
Yes, GRZ100
Relay
No
1
Yes, Directional
JNP096, JVS make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, ABB
Yes, Directional
make REL670,
P127, Areva make
Numerical
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes,
Yes, REL670
REL670 &
& P127 Relay
P127 Relay
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
Yes, Areva
make P442,
Numerical
Yes, Directional
CDD, EE make
Yes, P442
Relay
Yes, P442
Relay
Yes, P442
Relay
Yes,
REL670
Relay
132
Umtru
3
Yes, ABB
Yes, Directional
make REL670,
P127, Areva make
Numerical
Umiam St III
(Kyrdemkulai)
132
Umiam St I (Sumer)
Yes, Directional
CDD, EE make
Yes, ABB
Yes, Directional
make REL670,
P127, Areva make
Numerical
Yes, Areva
make P442,
Numerical
Yes, Areva
make P442,
Numerical
Yes, Areva
make P442,
Numerical
Yes, Directional
P141, Areva make
Yes, P442
Relay
Yes,
GRZ100
Relay
Yes, P442
Relay
Yes,
Yes, GRZ100
GRZ100 &
& P127 Relay
P127 Relay
Yes, P442
Relay
Yes, P442
Relay
Yes,
GRZ100
Relay
Yes,
REL670
Relay
Yes, P442
Relay
Yes,
GRZ100
Relay
Yes, P442
Relay
Yes,
REL670
Relay
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
End specified for
Protection
1. Owner of Line/End: Assam, AEGCL
6
Umiam St III
(Kyrdemkulai) - Umiam
St I (Sumer) II
Umiam St III
(Kyrdemkulai)
132
8
EPIP II - Umtru I
EPIP II - Umtru II
132
EPIP II - EPIP I (I)
132
10
EPIP II - EPIP I (II)
132
11
12
Khliehriat - Myntdu
Leshka I
Khliehriat - Myntdu
Leshka II
Yes, ABB
Yes, Directional
make REL670,
P127, Areva make
Numerical
Fault
Locator
exists
(Yes / No)
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes,
Yes, REL670
REL670 &
& P127 Relay
P127 Relay
Yes,
REL670
Relay
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
No
No
No
No
0
No
No
No
No
No
No
No
0
No
No
No
No
No
No
No
0
No
No
No
EPIP II
Umtru
No
EPIP II
No
Umtru
No
Yes, Directional
JNP060, JVS make
No
No
No
No
0
No
No
No
EPIP II
EPIP I
EPIP II
EPIP I
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
0
0
0
0
No
No
No
No
No
No
No
No
Khliehriat
Yes, ABB
make REL670,
Numerical
Yes, Directional
REX521,ABB
make
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes, REL670
& REX521
Relay
Myntdu Leshka
Yes, ABB
make REL670,
Numerical
Yes, Directional
REX521,ABB
make
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes, REL670
& REX521
Relay
Khliehriat
Yes, ABB
make REL670,
Numerical
Yes, Directional
REX521,ABB
make
No
Yes
Yes
No
1
Yes, REL670
& REX521
Relay
Myntdu Leshka
Yes, ABB
make REL670,
Numerical
Yes, Directional
REX521,ABB
make
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes, REL670
& REX521
Relay
No
No
No
No
Yes,
REL670 &
REX521
Relay
Yes,
REL670 &
REX521
Relay
Yes,
REL670 &
REX521
Relay
Yes,
REL670 &
REX521
Relay
132
9
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Yes, Areva
make P442,
Numerical
No
Umiam St I (Sumer)
7
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Yes, Directional
P141, Areva make
No
Yes, Directional
IDMTL, ER make
Yes, Directional
CDD, ER make
132
132
Yes,
REL670
Relay
Yes,
REL670
Relay
Yes
Yes,
REL670
Relay
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
End specified for
Protection
1. Owner of Line/End: Assam, AEGCL
13
14
Killing - EPIP II (I)
Killing - EPIP II (II)
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Killing
Yes, ABB
make REL670,
Numerical
Yes, Areva make
P442, Numerical
No
Yes, REL670,
P442 Relay
Yes, REL670,
P442 Relay
No
1
Yes, REL670,
P442 Relay
EPIP II
Yes, Areva
make P442,
Numerical
Yes, Directional
P127, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P127 Relay P127 Relay
Relay
Killing
Yes, ABB
make REL670,
Numerical
Yes, Areva make
P442, Numerical
No
Yes, REL670,
P442 Relay
Yes, REL670,
P442 Relay
No
1
Yes, REL670,
P442 Relay
EPIP II
Yes, Areva
make P442,
Numerical
Yes, Directional
P127, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P127 Relay P127 Relay
Relay
Yes, Alstom
make P442,
Numerical
Yes, Directional
P141, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
Yes, Directional
P141, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
Yes, Directional
P127 Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P127 Relay P127 Relay
Relay
Yes, Directional
P141, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
132
132
Yes,
Yes,
REL670,
REL670,
P442 Relay P442 Relay
Yes,
Yes,
REL670,
REL670,
P442 Relay P442 Relay
Umiam St I (Sumer
15
Umiam St I (Sumer) Mawngap I
16
Umiam St I (Sumer) Mawngap II
132
Mawngap
Umiam St I (Sumer
132
Mawngap
Mawlai
17
Mawlai - Mawngap I
132
Mawngap
Yes, Alstom
make P442,
Numerical
Yes, Areva
make P442,
Numerical
Yes, Alstom
make P442,
Numerical
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
18
Nongstoin - Mawngap
132
End specified for
Protection
Nongstoin
Mawngap
Nongstoin
19
Nongstoin - Nangalbibra
132
Nangalbibra
Khliehriat
20
Khliehriat - NEHU
132
NEHU
21
22
Khliehriat NEIGRIHMS
NEIGRIHMS - NEHU
23
No
Yes, Alstom
make P442,
Numerical
Yes, Areva
make P442,
Numerical
Yes, Areva
make P442,
Numerical
Yes, Areva
make P442,
Numerical
Yes, Areva
make P442,
Numerical
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
No
No
No
0
No
No
No
Yes, Directional
P141, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
Yes, Directional
P127, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P127 Relay P127 Relay
Relay
Yes, Directional
P127, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P127 Relay P127 Relay
Relay
Yes, Directional
CDD, EE make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, Directional
P127 Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P127 Relay P127 Relay
Relay
Yes, P442
Relay
Yes, P442
Relay
Yes, P442
Relay
Khliehriat
Yes, ABB
make REL670,
Numerical
Yes, Directional
CDD, EE make
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes, REL670
Relay
Yes,
REL670
Relay
Yes,
REL670
Relay
NEIGRIHMS
Yes, Areva
make P442,
Numerical
Yes, Directional
CDD, EE make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442
Relay
Yes, P442
Relay
Yes, P442
Relay
NEIGRIHMS
No
No
No
No
No
0
No
No
No
No
No
No
No
1
Yes, P127
Relay
Yes, P127
Relay
No
Yes, Directional
P127, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, Directional
P127, Areva make
No
No
No
No
0
132
132
NEHU
Nangalbibra - Rongkhon
(Tura)
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Nangalbibra
132
Rongkhon (Tura)
Yes, EE make
RR3V, EM
Yes, Areva
make P442,
Numerical
No
Yes, Directional
CDD, EE make
Yes, Directional
P127 Areva make
Yes, P442 & Yes, P442 & Yes, P442
P127 Relay P127 Relay
Relay
Yes, P127
Relay
Yes, P127
Relay
No
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
24
25
Lumshnong - Khliehriat
Sohra (Cherrapunjee) Mawlai
End specified for
Protection
Umiam St I (Sumer) Umiam
Yes, Directional
IDMTL, ER make
No
No
No
No
0
No
No
No
Khliehriat
Yes, Areva
make P442,
Numerical
Yes, Directional
CDD, EE make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442
Relay
Yes, P442
Relay
Yes, P442
Relay
Yes, Directional
P127 Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P127 Relay P127 Relay
Relay
Yes, Directional
P141, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
Yes, Toshiba
Yes, Directional
make GRZ100,
JNP066, JVS make
numerical
No
Yes, GRZ100
Relay
Yes, GRZ100
Relay
No
1
Yes, Directional
JNP066, JVS make
No
No
No
No
0
No
No
No
Yes, Directional
P127 Areva make
No
No
No
No
1
Yes, P127
Relay
Yes, P127
Relay
No
Yes, Directional
P141, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
Yes, Directional
P127 Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P127 Relay P127 Relay
Relay
Umiam St III
(Kyrdemkulai)
Yes, ABB
Yes, Directional
make REL670,
P127, Areva make
Numerical
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes,
Yes, REL670
REL670 &
& P127 Relay
P127 Relay
Yes,
REL670
Relay
Umiam St IV
(Nongkhyllem)
Yes, ABB
Yes, Directional
make REL670,
P127, Areva make
Numerical
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes,
Yes, REL670
REL670 &
& P127 Relay
P127 Relay
Yes,
REL670
Relay
132
Sohra
(Cherrapunjee)
132
Mawlai
132
Umiam
Umiam - NEHU
29
Umiam St I (Sumer) Mawlai
Umiam St III
(Kyrdemkulai) - Umiam
St IV - I (Nongkhyllem)
Yes, Areva
make P442,
Numerical
Yes, Areva
make P442,
Numerical
No
132
Yes, EE make
RR3V, EM
Yes, Areva
Umiam St I (Sumer) make P442,
Numerical
Yes, Areva
Mawlai
make P442,
Numerical
NEHU
28
Fault
Locator
exists
(Yes / No)
No
Umiam
27
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Lumshnong
Umiam St I (Sumer)
26
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
132
Yes, GRZ 100 Yes, GRZ
Relay
100 Relay
Yes,
GRZ100
Relay
132
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
End specified for
Protection
1. Owner of Line/End: Assam, AEGCL
30
Umiam St III
(Kyrdemkulai) - Umiam
St IV - II (Nongkhyllem)
Mawlai - NEHU
33
Umiam St I (Sumer) Umiam St II (Umsumer)
EPIP II - Trishul
Fault
Locator
exists
(Yes / No)
Yes, Toshiba
Yes, Directional
make GRZ100,
JNP053, JVS make
Numerical
No
Yes, GRZ100
Relay
Yes, GRZ100
Relay
No
1
Yes,
Yes, GRZ100
GRZ100 &
& P127 Relay
P127 Relay
Yes,
GRZ100
Relay
Umiam St IV
(Nongkhyllem)
Yes, ABB
Yes, Directional
make REL670,
P127, Areva make
Numerical
No
Yes, REL670
Relay
Yes, REL670
Relay
No
1
Yes,
Yes, REL670
REL670 &
& P127 Relay
P127 Relay
Yes,
REL670
Relay
No
No
No
No
0
No
No
No
No
1
Yes, Directional
P141, Areva make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
132
132
No
Yes, EE make
RR3V, EM
Yes, Areva
Umiam St I (Sumer) make P442,
Numerical
NEHU
32
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Umiam St III
(Kyrdemkulai)
Mawlai
31
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
132
132
Yes, Directional
P127 Areva make
Yes, Directional
P127 Areva make
Yes, P127
Relay
Yes, P127
Relay
Yes, P127
Relay
Yes, P127
Relay
No
No
Umiam St II
(Umsumer)
No
Digital GRD 130,
No
No
No
No
0
Yes, Digital
GRD 130
Relay
Yes, Digital
GRD 130
Relay
No
EPIP II
No
Yes, Directional
CDD, ER make
No
No
No
No
0
No
No
No
No
Yes, Directional
CDD, ER make
No
No
No
No
0
No
No
No
No
Yes, Directional
CDD, ER make
No
No
No
No
0
No
No
No
No
Yes, Directional
CDD, ER make
No
No
No
No
0
No
No
No
No
Yes, Directional
CDD, ER make
No
No
No
No
0
No
No
No
No
Yes, Directional
CDD, ER make
No
No
No
No
0
No
No
No
Trishul
34
EPIP II - Nalari
132
EPIP II
Nalari
35
EPIP I - Shyam Century
132
EPIP I
Shyam Century
36
EPIP I - Maithan
132
EPIP I
Maithan
37
EPIP I - Sai Prakash
132
EPIP I
Sai Prakash
38
39
EPIP I Greystone/Nezone
132
EPIP I - Megha Carbides
132
EPIP I
Greystone/Nezone
EPIP I
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
39 EPIP I - Megha Carbides
132
1. Owner of Line/End: Assam, AEGCL
40
Lumshnong - CMCL
132
End specified for
Protection
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Megha Carbides
Lumshnong
No
Yes, Directional
CDD, ER make
No
No
No
No
0
No
No
No
No
Yes, Directional
JNC069, JVS make
No
No
No
No
0
No
No
No
No
Yes, Directional
JNC069, JVS make
No
No
No
No
0
No
No
No
No
Yes, Directional
JNC069, JVS make
No
No
No
No
0
No
No
No
No
Yes, Directional
JNC069, JVS make
No
No
No
No
0
No
No
No
No
No
No
No
0
No
No
No
No
No
No
No
0
Yes, P127
Relay
Yes, P127
Relay
No
No
Yes, P442
Relay
Yes, P442
Relay
No
1
CMCL
41
Lumshnong - MCL
132
Lumshnong
MCL
42
Lumshnong - Adhunik
Cement
132
Lumshnong
Adhunik Cement
43
Lumshnong - Hill
Cement
132
Lumshnong
Hill Cement
44
Lumshnong - JUD
Cement
45
Lumshnong - GVIL
Cement
132
46
MPL (Meghalaya Power
Limited) - Lumnsnong
132
47
Sohra (Cherrapunjee) Mawngap
132
Lumshnong
JUD Cement
Lumshnong
GVIL Cement
MPL (Meghalaya
Power Limited)
Lumshnong
No
Sohra
(Cherrapunjee)
No
Mawngap
Yes, Alstom
make P442,
Numerical
132
Yes, Directional
P127 Areva make
Yes, Directional
P127, Areva make
Yes, Directional
P141, Areva make
Yes, P442 & Yes, P442 & Yes, P442
P141Relay P141Relay
Relay
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
End specified for
Protection
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
1.
AEGCL
4. Owner of Line/End: Assam,
P&E, Mizoram
1
Bairabi - Kolasib
132
2
Zuangtui (Zemabawk) Bukpui (Serchhip)
132
3
Bukpui (Serchhip) Khawiva (Lunglei)
132
4
Zuangtui (Zemabawk) Saitual
132
Saitual - Khawzawl
132
5
Bairabi
Micom P430A
Kolasib
No
Zuangtui
No
(Zemabawk)
Bukpui (Serchhip)
No
Bukpui (Serchhip)
No
Khawiva (Lunglei)
No
Zuangtui
No
(Zemabawk)
Saitual
No
Saitual
No
Khawzawl
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes (EM)
No
Yes (EM)
Yes (EM)
No
4
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes, O/C & EF
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
5. Owner of Line/End: NEEPCO
1
2
Khandong - Kopili -I
Khandong - Kopili - II
132
132
Khandong
Kopili
Khandong
Kopili
Yes, REL 670
Yes, REL 670
6. Owner of Line/End: POWERGRID
1
Badarpur- Jiribam
132
Badarpur (PG)
Jiribam (PG)
Aizawl (PG)
2
Aizawl-Kumarghat
132
Kumarghat (PG)
Badarpur (PG)
3
Badarpur - Khliehriat
132
Khliehriat (PG)
4
Badarpur-Kumarghat
132
Badarpur (PG)
Kumarghat (PG)
Yes, MICOM
P442
Yes, 7SA513
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Yes, 7SA513
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
5
Dimapur - Imphal
132
End specified for
Protection
Dimapur (PG)
Imphal (PG)
Jiribam (PG)
6
Jiribam - Aizawl
132
Aizawl (PG)
Jiribam (PG)
7
Jiribam-Haflong
132
Haflong (PG)
Silchar (PG)
8
Silchar- Badarpur-1
132
Badarpur (PG)
Silchar (PG)
9
Silchar- Badarpur-2
132
Badarpur (PG)
10
Silchar- Imphal-1
132
Silchar (PG)
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Yes, MICOM
P442
Yes, 7SA513
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Yes, MICOM
P442
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Imphal (PG)
11
Silchar- Imphal-2
132
Silchar (PG)
Imphal (PG)
12
Silchar- Melriat-1
132
Silchar (PG)
Melriat (PG)
13
Silchar- Melriat-2
132
Silchar (PG)
Melriat (PG)
Fault
Locator
exists
(Yes / No)
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
End specified for
Protection
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
1. Owner of Line/End
Line/End::Assam,
7.
TSECLAEGCL
1
2
3
4
5
6
7
8
9
10
11
12
Grid-Rokhia-I
Grid-Rokhia-II
Grid-Dhalabil
Dhalabil-Garodtilla
Garodtilla-PKBari
Garodtilla-Ambassa
Grid-Bodhjungnagar
Bodhjungnagar-Jirania
Jirania-Baramura
Baramura-Gamaitilla
Gamaitilla-Ambassa
Ambassa-PKBari
132
132
132
132
132
132
132
132
132
132
132
132
Grid
No
Yes
No
No
No
No
No
No
No
No
Rokhia
No
Yes
No
No
No
No
No
No
No
No
Grid
No
No
No
No
No
No
No
No
No
No
Rokhia
No
No
No
No
No
No
No
No
No
No
Grid
No
No
No
No
No
No
No
No
No
No
Dhalabil
No
No
No
No
No
No
No
No
No
No
Dhalabil
No
No
No
No
No
No
No
No
No
No
Garodtilla
No
No
No
No
No
No
No
No
No
No
Garodtilla
No
No
No
No
No
No
No
No
No
No
PKBari
No
No
No
No
No
No
No
No
No
No
Garodtilla
No
No
No
No
No
No
No
No
No
No
Ambassa
No
No
No
No
No
No
No
No
No
No
Grid
No
No
No
No
No
No
No
No
No
No
Bodhjungnagar
Yes
Yes
No
No
Yes
No
3 & 2-Core
No
No
No
Bodhjungnagar
Yes
Yes
No
No
Yes
No
3 & 2-Core
No
No
No
Jirania
Yes
Yes
No
No
Yes
No
3 & 2-Core
No
No
No
Jirania
Yes
Yes
No
No
Yes
No
3 & 2-Core
No
No
No
Baramura
No
No
No
No
No
No
No
No
No
No
Baramura
No
No
No
No
No
No
No
No
No
No
Gamaitilla
Yes
Yes
No
No
Yes
No
3 & 2-Core
No
No
No
Gamaitilla
No
No
No
No
No
No
No
No
No
No
Ambassa
No
No
No
No
No
No
No
No
No
No
Ambassa
No
No
No
No
No
No
No
No
No
No
PKBari
No
No
No
No
No
No
No
No
No
No
132 kV Transmission Line Protection Details
Annexure-A.8 (II)
Protection Details
Sl.
No.
Name of Line
Charged
Voltage
in kV
1. Owner of Line/End: Assam, AEGCL
13 Bodhjungnagar-SMNagar
132
14
15
16
SMNagar-Grid
PKBari-Gournagar
PKBari-Missiontilla
132
132
132
End specified for
Protection
Main I
Protection
exists (Type of
Relay and
Make)
(Yes/No)
Data Recording System Details
Directional
Auto
Event
Instantaneous
Reclosing
Number of
Logger /
Carrier aided Power Swing
Pole
Disturbance
Definite Minimum
(Single
Core used
Sequential
Inter-tripping
Blocking
Discrepancy
Recorder
Time(IDMT) Over- Phase /
for CT &
Event
exists
Feature exists Relay exists
exists
Current & Earth Three Phase)
VT, used
Recorder
(Yes / No)
(Yes / No)
(Yes / No)
(Yes / No)
Fault Relay exists
exists
for Main I
exists
(Yes/No)
(Yes / No)
(Yes / No)
Fault
Locator
exists
(Yes / No)
Bodhjungnagar
Yes
Yes
No
No
Yes
No
3 & 2-Core
No
No
No
SMNagar
Yes
Yes
No
No
Yes
No
3 & 2-Core
No
No
No
SMNagar
Yes
Yes
No
No
Yes
No
3 & 2-Core
No
No
No
Grid
No
No
No
No
No
No
No
No
No
No
PKBari
No
No
No
No
No
No
No
No
No
No
Gournagar
No
No
No
No
No
No
No
No
No
No
PKBari
No
No
No
No
No
No
No
No
No
No
Missiontilla
Yes
Yes
No
No
Yes
No
3 & 2-Core
No
No
No
Note : 1) Main-I Protection indicates Distance Protection
2) Main-II Protection indicates one of Distance Protection / Directional Comparison Protection / Phase Segregated Line Differential protection
3) Type of Relay indicates it's operational mechanism - Numerical / Static / Electro-mechanical
4) List of inbuilt features of Numerical Relays are also to be furnished alongwith this format
132 kV Transmission Line Protection Details
Annexure-II
Protection Details
Sl. No.
Name of Line
Data Recording System Details
Directional
Event
Main I
Auto
Power
Number
Instantaneous
Carrier
Logger
/
Charged
Protection
Reclosing
Swing
Pole
of Core Disturbance
Fault
Sequential
Voltage End specified for Protection exists (Type Definite Minimum (Single Phase / aided Inter- Blocking Discrepancy used for
Recorder
Locator
Time(IDMT) Overtripping
Event
in kV
of Relay and
Three Phase)
Feature Relay exists CT & VT,
exists
exists
Current & Earth
exists
Recorder
Make)
exists
exists (Yes (Yes / No)
used for
(Yes / No)
(Yes / No)
Fault Relay exists
(Yes / No)
exists
(Yes/No)
(Yes / No)
/ No)
Main I
(Yes/No)
(Yes / No)
1. Owner of End : Assam & Meghalaya
Kahilipara
1
Kahilipara-Umtru I
132
Umtru
Kahilipara
2
Kahilipara-Umtru II
132
Umtru
Panchgram
3
Panchgram-Khliehriat
132
Khliehriat
Panchgram
4
PanchgramLumshnong
132
Sarusajai-Umtru
132
Lumshnong
Sarusajai
5
Umtru
Sarusajai
6
Sarusajai-Umiam Stg
IV
132
Agia - Nangalbibra
132
Umiam Stg IV
Yes (7SA
SIEMENS)
Yes,
Directional
JNP096, JVS
make
Yes (7SA
SIEMENS)
Yes,
Directional
JNP096, JVS
make
Yes(7SA
SIEMENS)
NoT
KNoWN
Yes(7SA
SIEMENS)
Yes, Areva
make P442,
Numerical
Yes(THR
ER)
Yes, Areva
make P442,
Numerical
Yes(THR
ER)
Yes, Areva
make P442,
Numerical
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
No
Yes, GRZ100
Relay
Yes,
GRZ100
Relay
No
1
Yes (IDMTL)
No
No
Yes
Yes
No
Yes, GRZ100
Relay
Yes,
GRZ100
Relay
No
1
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Non directional
CDG, EE make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442
Relay
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes, Directional
CDD, EE make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442
Relay
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes, Directional
CDD, EE make
No
Yes, P442
Relay
Yes, P442
Relay
No
1
Yes, P442
Relay
Yes, Directional
P127, Areva make
No
No
No
No
Yes,
Yes, GRZ100
GRZ100
Relay
Relay
1
Yes
Yes,
Yes, GRZ100
GRZ100
Relay
Relay
Yes
Yes
Yes,
GRZ100
Relay
Yes
Yes
Yes,
GRZ100
Relay
Yes, P442 Yes, P442
Relay
Relay
Yes
Yes
Yes, P442 Yes, P442
Relay
Relay
Yes
Yes
Yes, P442 Yes, P442
Relay
Relay
Agia
7
Nangalbibra
No
0
Yes, P127
Relay
Yes P127
Relay
No
132 kV Transmission Line Protection Details
Annexure-II
Protection Details
Sl. No.
Name of Line
Data Recording System Details
Directional
Event
Main I
Auto
Power
Number
Instantaneous
Carrier
Logger /
Charged
Protection
Reclosing
Swing
Pole
of Core Disturbance
Fault
Sequential
Voltage End specified for Protection exists (Type Definite Minimum (Single Phase / aided Inter- Blocking Discrepancy used for
Recorder
Locator
Time(IDMT) Overtripping
Event
in kV
of Relay and
Three Phase)
Feature Relay exists CT & VT,
exists
exists
Current & Earth
exists
Recorder
Make)
exists
exists (Yes (Yes / No)
used for
(Yes / No)
(Yes / No)
Fault Relay exists
(Yes / No)
exists
(Yes/No)
(Yes / No)
/ No)
Main I
(Yes/No)
(Yes / No)
1.
2. Owner of End : Assam & Meghalaya
POWERGRID
Mokokchung (PG)
1
Mokokchung-Mariani
132
Mariani
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
1
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes (IDMTL)
No
No
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, 7SA522
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Nirjuli (PG)
Yes,
MICOM
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Haflong (PG)Haflong
Haflong (PG)
Yes, P442
Yes, P141
Yes
Yes
Yes
Yes
Yes
Silchar (PG)Hailakandi I
Silchar (PG)
Yes,
MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes,
MICOM
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes,
MICOM
P543
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Pailapool
2
Pailapool-Jiribam(PG)
132
Jiribam(PG)
3
Dimapur (PG) Bokajan
Dimapur(PG)
132
Bokajan
4
Badarpur (PG) Badarpur
Badarpur (PG)
Badarpur
5
Not KNown
Yes(7SA
SIEMENS)
Yes(7SA
SIEMENS)
Yes,
MICOM
P442
Yes,
MICOM
P442
Yes(THR
ER)
Yes,
MICOM
P442
Yes,
MICOM
Balipara (PG)Gohpur
Balipara (PG)
Yes
Yes
1
Gohpur
Gohpur
6
7
8
Gohpur - Nirjuli
Haflong
Hailakandi
9
10
Silchar (PG)Hailakandi II
Silchar (PG)
Silchar (PG)- Srikona
I
Silchar (PG)
Hailakandi
Yes
132 kV Transmission Line Protection Details
Annexure-II
Protection Details
Sl. No.
Name of Line
Directional
Event
Main I
Auto
Power
Number
Instantaneous
Carrier
Logger /
Charged
Protection
Reclosing
Swing
Pole
of Core Disturbance
Fault
Sequential
Voltage End specified for Protection exists (Type Definite Minimum (Single Phase / aided Inter- Blocking Discrepancy used for
Recorder
Locator
Time(IDMT) Overtripping
Event
in kV
of Relay and
Three Phase)
Feature Relay exists CT & VT,
exists
exists
Current & Earth
exists
Recorder
Make)
exists
exists (Yes (Yes / No)
used for
(Yes / No)
(Yes / No)
Fault Relay exists
(Yes / No)
exists
(Yes/No)
(Yes / No)
/ No)
Main I
(Yes/No)
(Yes / No)
1. Owner of End : Assam & Meghalaya
11
Data Recording System Details
Silchar (PG)- Srikona
II
Srikona
Silchar (PG)
Yes,
MICOM
P543
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Srikona
3. Owner of End : Manipur & POWERGRID
1
Imphal(Manipur) Imphal(PG) I
132
2
Imphal(Manipur) Imphal(PG) II
132
3
Imphal(PG) Ningthoukhong
132
4
5
Jiribam (PG) - Jiribam
(Manipur)
Jiribam (PG) Rengpang
Imphal (Manipur)
Yes
Yes
Yes
No
Imphal(PG)
Yes, O/C
Yes, O/C & EF
Yes
Yes
Imphal (Manipur)
Yes
Yes, P543
(Differencial)
Yes
Yes
No
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Jiribam (Manipur)
Yes
Yes
Yes
No
No
Yes
Jiribam (PG)
Yes,
MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes,
Numerical
MICOM
P442
Yes, (EM relay in
addition to
Numerical Relay)
Feature exists
in SF6 breaker
& Numerical
Relay
No
Yes
Yes
Rengpang
Yes
Yes
Yes
No
No
Loktak
Yes,
Numerical
MICOM
P442
Yes, (EM relay in
addition to
Numerical Relay)
Feature exists
in SF6 breaker
& Numerical
Relay
No
Ningthoukhong
Yes
Yes
Yes
No
Imphal(PG)
132
Yes
4&3
No
No
Yes
Yes
No
No
Yes
Yes
4&3
No
No
No
4&3
No
No
No
Yes
Yes
1 core
each
Yes
Yes
Yes
Yes
4&3
No
No
No
Yes
Yes
1 core
each
Yes
Yes
Yes
No
Yes
4&3
No
No
No
Yes
No
Yes
4&3
Yes
No
No
Imphal(PG)
Ningthoukhong
132
No
Jiribam (PG)
Yes
Rengpang
4. Owner of End : Manipur & NHPC
1
2
Loktak - Rengpang
Loktak Ningthoukhong
132
132
Loktak
132 kV Transmission Line Protection Details
Annexure-II
Protection Details
Sl. No.
Name of Line
Data Recording System Details
Directional
Event
Main I
Auto
Power
Number
Instantaneous
Carrier
Logger /
Charged
Protection
Reclosing
Swing
Pole
of Core Disturbance
Fault
Sequential
Voltage End specified for Protection exists (Type Definite Minimum (Single Phase / aided Inter- Blocking Discrepancy used for
Recorder
Locator
Time(IDMT) Overtripping
Event
in kV
of Relay and
Three Phase)
Feature Relay exists CT & VT,
exists
exists
Current & Earth
exists
Recorder
Make)
exists
exists (Yes (Yes / No)
used for
(Yes / No)
(Yes / No)
Fault Relay exists
(Yes / No)
exists
(Yes/No)
(Yes / No)
/ No)
Main I
(Yes/No)
(Yes / No)
1.
& Meghalaya
5. Owner of End : Assam
MePTCL
& POWERGRID
1
Khliehriat - Khliehriat
(Meghalaya) I
No
Yes, P442
Relay
Yes, O/C & EF
Yes
Yes
No
Yes, Directional
P127 Areva make
No
No
Badarpur (PG)
Yes,
MICOM
P442
Yes, O/C & E/F
Yes
Yes
Kolasib
Yes, 7SA513
Yes, O/C & E/F
Yes
Kolasib
Yes, 7SA513
Yes, O/C & E/F
Aizwal (PG)
Yes, 7SA513
Yes, O/C & E/F
132
Khliehriat (PG)
2
Khliehriat - Khliehriat
(Meghalaya) II
132
Yes, Areva
make P442,
Numerical
Yes,
MICOM
P442
Yes, Directional
CDD, EE make
Khliehriat (Meghalaya)
Khliehriat (Meghalaya)
Yes, P442
Relay
No
1
Yes
Yes, P442
Relay
Yes, P442 Yes, P442
Relay
Relay
Yes
Yes
Yes, P127
Relay
Yes, P127
Relay
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
0
No
Khliehriat (PG)
6. Owner of End: P&E, Mizoram & POWERGRID
1
2
Badarpur - Kolasib
Kolasib - Aizwal
132
132
3
Aizwal - Luangmual
132
4
Zuangtui (Zemabawk)
- Aizwal I
132
5
Zuangtui (Zemabawk)
- Aizwal II
132
Aizwal (PG)
Luangmual
Zuangtui (Zemabawk)
No
No
No
No
Aizwal (PG)
Yes, 7SA513
Yes, O/C & E/F
Yes
Yes
Zuangtui (Zemabawk)
No
Yes, REL
670
No
No
No
Yes, O/C & E/F
Yes
Yes
Aizwal (PG)
No
No
No
No
No
Yes
Yes
Yes
No
No
No
Yes
Yes
Yes
No
No
132 kV Transmission Line Protection Details
Annexure-II
Protection Details
Sl. No.
Name of Line
Data Recording System Details
Directional
Event
Main I
Auto
Power
Number
Instantaneous
Carrier
Logger
/
Charged
Protection
Reclosing
Swing
Pole
of Core Disturbance
Fault
Sequential
Voltage End specified for Protection exists (Type Definite Minimum (Single Phase / aided Inter- Blocking Discrepancy used for
Recorder
Locator
Time(IDMT) Overtripping
Event
in kV
of Relay and
Three Phase)
Feature Relay exists CT & VT,
exists
exists
Current & Earth
exists
Recorder
Make)
exists
exists (Yes (Yes / No)
used for
(Yes / No)
(Yes / No)
Fault Relay exists
(Yes / No)
exists
(Yes/No)
(Yes / No)
/ No)
Main I
(Yes/No)
(Yes / No)
1. Owner of End:
End :NEEPCO
Assam & Meghalaya
7.
& POWERGRID
Rangandi
1
Ranganadi-Nirjuli
132
Nirjuli (PG)
Rangandi
2
Ranganadi-Ziro
132
Ziro (PG)
AGTPP
3
4
AGTPP- Kumarghat
Balipara-Khupi
132
132
Semi
Numerical,
EPAC 3000,
Yes
MakeAlstom
Yes,
Yes, O/C & EF
MICOM
Semi
Numerical,
EPAC 3000,
Yes
MakeAlstom
Yes,
MICOM
Yes, O/C & EF
P442
OPTIMHO
(LFZP111S1
No, Directional
0053E)
Inverse type –CDD
Make: GEC
relay exists
ALSTOM
Yes (Three
Phase)
No
Yes
Yes
Yes (Three
Phase)
No
Yes
Yes
Facility exists
but not in
service
Yes
Yes
No
Core-1 of
CT &
CVT are
used for
Main-1
Yes
Yes
No
Core-1 of
CT &
CVT are
used for
Main-1
Yes
Yes
Yes
Core-1 of
CT &
CVT are
used for
Main-1
No
No
Yes
Yes
No
No
Yes
Yes
No
No
Kumarghat (PG)
Yes, 7SA513
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Balipara (PG)
Yes,
SEL311C
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Khupi
Doyang
5
Doyang - Dimapur-I
132
Dimapur(PG)
Static relayREL-100,
ABB Make
Yes,
MICOM
P442
Relay-2TJM-12
(Easun Reyrole)
Yes, O/C & EF
Yes
Yes
Yes
No
Yes
No
No
No
132 kV Transmission Line Protection Details
Annexure-II
Protection Details
Sl. No.
Name of Line
Directional
Event
Main I
Auto
Power
Number
Instantaneous
Carrier
Logger
/
Charged
Protection
Reclosing
Swing
Pole
of Core Disturbance
Fault
Sequential
Voltage End specified for Protection exists (Type Definite Minimum (Single Phase / aided Inter- Blocking Discrepancy used for
Recorder
Locator
Time(IDMT) Overtripping
Event
in kV
of Relay and
Three Phase)
Feature Relay exists CT & VT,
exists
exists
Current & Earth
exists
Recorder
Make)
exists
exists (Yes (Yes / No)
used for
(Yes / No)
(Yes / No)
Fault Relay exists
(Yes / No)
exists
(Yes/No)
(Yes / No)
/ No)
Main I
(Yes/No)
(Yes / No)
1. Owner of End : Assam & Meghalaya
Doyang
6
Doyang - Dimapur-II
Data Recording System Details
132
Dimapur(PG)
Static relayREL-100,
ABB Make
Yes,
MICOM
P442
Relay-2TJM-12
(Easun Reyrole)
Yes
No
Yes
Yes
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes,
MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Khliehriat (PG)
Yes,
MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Khandong
Yes, 7SA513
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Khliehriat (PG)
Yes,
MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
Khandong
7
Khandong - Haflong
8
Khandong - KhliehriatI
9
Khandong - KhliehriatII
132
Haflong (PG)
Khandong
132
132
8. Owner of End: NEEPCO & TSECL
1
132 kV AGTPPAgartala I
132 kV
AGTPP
Agartala
2
132 kV AGTPPAgartala II
132 kV
AGTPP
Agartala
OPTIMHO
(LFZP111S1
No, Directional
0053E)
Inverse type –CDD
Make: GEC
relay exists
ALSTOM
OPTIMHO
OPTIMHO
(LFZP111S1
No, Directional
0053E)
Inverse type –CDD
Make: GEC
relay exists
ALSTOM
OPTIMHO
Facility exists
but not in
service
Yes
Yes
Yes
Facility exists
but not in
service
Yes
Yes
Yes
Yes
Yes
Core-1 of
CT &
CVT are
used for
Main-1
Yes
Yes
Yes
Core-1 of
CT &
CVT are
used for
Main-1
No
No
132 kV Transmission Line Protection Details
Annexure-II
Protection Details
Sl. No.
Name of Line
Data Recording System Details
Directional
Event
Main I
Auto
Power
Number
Instantaneous
Carrier
Logger /
Charged
Protection
Reclosing
Swing
Pole
of Core Disturbance
Fault
Sequential
Voltage End specified for Protection exists (Type Definite Minimum (Single Phase / aided Inter- Blocking Discrepancy used for
Recorder
Locator
Time(IDMT) Overtripping
Event
in kV
of Relay and
Three Phase)
Feature Relay exists CT & VT,
exists
exists
Current & Earth
exists
Recorder
Make)
exists
exists (Yes (Yes / No)
used for
(Yes / No)
(Yes / No)
Fault Relay exists
(Yes / No)
exists
(Yes/No)
(Yes / No)
/ No)
Main I
(Yes/No)
(Yes / No)
1. Owner of End : POWERGRID
Assam & Meghalaya
9.
& NHPC
1
2
Loktak - Imphal II
Loktak - Jiribam II
Yes, (EM relay in
addition to
Numerical Relay)
Feature exists
in SF6 breaker
& Numerical
Relay will be
implemented
by Jan'15
Yes
Yes, O/C & EF
Yes
Yes
Loktak
Yes,
Numerical
MICOM
P442
Imphal (PG)
Yes,
MICOM
P442
Loktak
Yes,
Numerical
MICOM
P442
Yes, (EM relay in
addition to
Numerical Relay)
Jiribam (PG)
Yes,
MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes,
MICOM
P442
Yes, O/C & EF
Yes
Yes,
MICOM
P442
Yes, O/C & EF
Yes,
MICOM
P442
Yes, O/C & EF
132
132
Yes
1 core
each
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Feature exists
Feature
in SF6 breaker
exists and
& Numerical
can be
Relay will be
added when
implemented
required
by Jan'15
Yes
Yes
Yes
Yes
1 core
each
10. Owner of End : POWERGRID & DoP, Nagaland
1
Dimapur (PG)Kohima
132
Dimapur(PG)
Kohima
2
Dimapur (PG)Dimapur (State)
132
Dimapur(PG)
Dimapur
11. Owner of End : POWERGRID & Gov. of Bhutan
1
Salakti-Gelephu
132
Salakati (PG)
Gelephu
Yes
Yes
132 kV Transmission Line Protection Details
Annexure-II
Protection Details
Sl. No.
Name of Line
Data Recording System Details
Directional
Event
Main I
Auto
Power
Number
Instantaneous
Carrier
Logger /
Charged
Protection
Reclosing
Swing
Pole
of Core Disturbance
Fault
Sequential
Voltage End specified for Protection exists (Type Definite Minimum (Single Phase / aided Inter- Blocking Discrepancy used for
Recorder
Locator
Time(IDMT) Overtripping
Event
in kV
of Relay and
Three Phase)
Feature Relay exists CT & VT,
exists
exists
Current & Earth
exists
Recorder
Make)
exists
exists (Yes (Yes / No)
used for
(Yes / No)
(Yes / No)
Fault Relay exists
(Yes / No)
exists
(Yes/No)
(Yes / No)
/ No)
Main I
(Yes/No)
(Yes / No)
1. Owner
& Meghalaya
12.
OwnerofofEnd
End: :Assam
POWERGRID
& TSECL
1
Silchar-P.K.Bari-1
132
Yes,
MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes,
MICOM
P442
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Yes, SEL
311C
Yes, O/C & EF
Yes
Yes
Yes
Yes
Yes
Static relayREL-100,
ABB Make
Relay-2TJM-12
(Easun Reyrole)
Yes
No
Yes
Yes
Static relayREL-100,
ABB Make
Relay-2TJM-12
(Easun Reyrole)
Yes
No
Yes
Yes
Missiontilla
ASEB
No
No
No
No
No
No
No
No
No
No
Banduar
Yes
Yes
No
No
Yes
No
3 & 2Core
No
No
No
Yes
Yes
No
No
Yes
No
3 & 2Core
No
No
No
Yes
Yes
No
No
Yes
No
3 & 2Core
No
No
No
Silchar (PG)
P.K. Bari
2
Silchar- P.K.Bari-2
132
Silchar (PG)
P.K. Bari
13. Owner of End : POWERGRID & DoP, Arunachal Pradesh
1
Ziro-Daporijo
132
Ziro (PG)
Daporijo
14. Owner of End : NEEPCO & DoP, Nagaland
1
Doyang- Mokokchung
132
Doyang
Mokokchung
2
Doyang- Kohima
132
Doyang
Kohima
15. Owner of End : NEEPCO & TSECL
1
Missiontilla-ASEB
132
2
Banduar- Palatana
132
Palatana
3
Banduar- Monarchak
132
Banduar
Monarchak
4
Rokhia-Monarchak
132
Rokhia
Monarchak
Note : 1) Main-I Protection indicates Distance Protection
2) Main-II Protection indicates one of Distance Protection / Directional Comparison Protection / Phase Segregated Line Differential protection
3) Type of Relay indicates it's operational mechanism - Numerical / Static / Electro-mechanical
4) List of inbuilt features of Numerical Relays are also to be furnished alongwith this format
220 kV Transmission Line Protection Details
Annexure II
Protection Details
Sl.
No.
Name of Line
Directional
Main I
Main II
Instantaneous Two stage
Charged End specified
Protection
Protection
Definite
OverVoltage in
for
Minimum
Voltage
kV
Protection exists (Type of exists (Type
Relay and
of Relay and Time(IDMT) Protection
Make)
Make)
type Earth
exists
(Yes/No)
(Yes/No)
Fault Relay
(Yes/No)
exists (Yes/No)
Data Recording System Details
Auto
Reclosing
(Single
Phase /
Three
Phase)
exists
(Yes/No)
Carrier
aided
Intertripping
exists
(Yes/No)
Event
Power
Number of Number of
Logger /
Swing
Pole
Disturbance
Core used Core used
Sequential
Blocking Discrepancy
Recorder
for CT & for CT &
Event
Feature Relay exists
exists
VT, used VT, used for
Recorder
exists
(Yes/No)
(Yes/No)
for Main I
Main II
exists
(Yes/No)
(Yes/No)
Fault
Locator
exists
(Yes/No)
1. Owner of Line : Assam, AEGCL
1
Agia- BTPS I
220
Agia
BTPS I
2
Agia- BTPS II
220
Agia
BTPS II
Azara
3
Azara-Sarusajai I
220
Sarusajai I
Azara
4
Azara-Sarusajai II
220
Sarusajai II
Boko
5
Boko-Azara
220
Azara
Agia
6
Agia-Azara
220
Azara
7
Agia- Salakati I
220
8
Agia- Salakati II
220
9
Agia-Sarusajai
220
10
Boko-Agia
220
Agia
Boko-Sarusajai
220
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(REL650
ABB)
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
Yes(IDMT)
Yes
Yes(1-PH)
Yes
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
Yes
Yes
Yes
1
1
Yes
Yes
Yes
Yes(REL650
ABB)
Yes(IDMT)
Yes
Yes(1-PH)
Yes
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
Yes
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
Yes
Yes
Yes
1
1
Yes
Yes
Yes
Yes(REL650
ABB)
Yes(IDMT)
Yes
Yes(1-PH)
Yes
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
Yes
Yes
Yes
1
1
Yes
Yes
Yes
Yes(REL650
ABB)
Yes(IDMT)
Yes
Yes(1-PH)
Yes
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
Agia
Salakati I
Agia
Salakati II
Agia
Sarusajai
Boko
11
Yes(SEL321
SEL)
Yes(D60 GE)
Yes(7SA52
SIEMENS)
Yes(D60 GE)
Yes(REL670
ABB)
Yes(7SA52
SIEMENS)
Yes(REL670
ABB)
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
Yes(REL670
ABB)
Yes(7SA52
SIEMENS)
Yes(REL670
ABB)
Boko
Sarusajai
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
No
No
220 kV Transmission Line Protection Details
Annexure II
Protection Details
Sl.
No.
Name of Line
Directional
Main I
Main II
Instantaneous Two stage
Charged End specified
Protection
Protection
Definite
OverVoltage in
for
Minimum
Voltage
kV
Protection exists (Type of exists (Type
Relay and
of Relay and Time(IDMT) Protection
Make)
Make)
type Earth
exists
(Yes/No)
(Yes/No)
Fault Relay
(Yes/No)
exists (Yes/No)
1. Owner of Line : Assam, AEGCL
12
Langpi- Sarusajai I
Langpi
220
Sarusajai I
Langpi
Langpi- Sarusajai
II
220
14
CMCL - Karbi
Langpi
220
15
Sarusajai - CMCL
220
13
16 Mariani-Samaguri I
Sarusajai II
CMCL
220
Sarusajai
CMCL
Mariani
Samaguri I
Mariani
Mariani-Samaguri
II
220
18 Salakati-Harigaon I
220
17
Karbi Langpi
Samaguri II
Salakari
Harigaon I
19
20
Salakati-Harigaon
II
220
Samaguri-Balipara
220
Samaguri-Sarusajai
21
I
22
Samaguri Jawahar Nagar
Salakari
Harigaon II
220
Samaguri
Balipara
Samaguri
Sarusajai I
Samaguri
220
Jawahar
Nagar
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
Not KNown
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
Not KNown
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
Not KNown
Yes(7SA52
SIEMENS)
Not KNown
Yes(7SA52
SIEMENS)
PGCIL
Yes(7SA52
SIEMENS)
Yes(L-PRO
ER)
Data Recording System Details
Auto
Reclosing
(Single
Phase /
Three
Phase)
exists
(Yes/No)
Carrier
aided
Intertripping
exists
(Yes/No)
Event
Power
Number of Number of
Logger /
Swing
Pole
Disturbance
Core used Core used
Sequential
Blocking Discrepancy
Recorder
for CT & for CT &
Event
Feature Relay exists
exists
VT, used VT, used for
Recorder
exists
(Yes/No)
(Yes/No)
for Main I
Main II
exists
(Yes/No)
(Yes/No)
Fault
Locator
exists
(Yes/No)
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
Yes
Yes
Yes
1
1
Yes
Yes
Yes
Yes(L-PRO
ER)
Yes(IDMT)
No
Yes(1-PH)
Yes
Yes
Yes
1
1
Yes
Yes
Yes
Yes(P442
MICOM)
PGCIL
220 kV Transmission Line Protection Details
Annexure II
Protection Details
Sl.
No.
Name of Line
Directional
Main I
Main II
Instantaneous Two stage
Charged End specified
Protection
Protection
Definite
OverVoltage in
for
Minimum
Voltage
kV
Protection exists (Type of exists (Type
Relay and
of Relay and Time(IDMT) Protection
Make)
Make)
type Earth
exists
(Yes/No)
(Yes/No)
Fault Relay
(Yes/No)
exists (Yes/No)
1. Owner of Line : Assam, AEGCL
Jawahar Nagar 23
220
Sarusajai
24
Jawahar
Nagar
Sarusajai
Samaguri
Samaguri-Sarusajai
II
220
Tinsukia-AGBPP I
220
Sarusajai II
Tinsukia
25
AGBPP I
26
Tinsukia
Tinsukia-AGBPP
II
220
Tinsukia-Namrup I
220
AGBPP II
Tinsukia
27
Namrup I
28
Tinsukia-Namrup
II
Tinsukia
220
Namrup II
Data Recording System Details
Auto
Reclosing
(Single
Phase /
Three
Phase)
exists
(Yes/No)
Carrier
aided
Intertripping
exists
(Yes/No)
Event
Power
Number of Number of
Logger /
Swing
Pole
Disturbance
Core used Core used
Sequential
Blocking Discrepancy
Recorder
for CT & for CT &
Event
Feature Relay exists
exists
VT, used VT, used for
Recorder
exists
(Yes/No)
(Yes/No)
for Main I
Main II
exists
(Yes/No)
(Yes/No)
Fault
Locator
exists
(Yes/No)
Yes(L-PRO
ER)
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
Yes(7SA52
SIEMENS)
Yes(7SA
SIEMENS)
Yes(SEL-321
SWITZER)
Yes(SEL-321
SWITZER)
Yes(SEL-321
SWITZER)
Yes(7SA52
SIEMENS)
Yes(7SA61
SIEMENS)
Yes(7SA52
SIEMENS)
Yes(7SA61
SIEMENS)
Yes(L-PRO
ER)
Yes(IDMT)
No
Yes(1-PH)
Yes
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
Yes
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
Yes(7SA
SIEMENS)
Yes(IDMT)
No
Yes(1-PH)
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
Yes(7SA
SIEMENS)
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes, ABB make
REL670,
Numerical
Yes, Areva
make P442,
Numerical
Yes
Yes
Yes,
Yes,
Yes,
REL670 &
REL670 & REL670 &
P442
P442 Relay P442 Relay
Relay
Yes
1
1
Yes,
Yes,
Yes, REL670
REL670 & REL670 &
& P442 Relay
P442 Relay P442 Relay
Yes, ABB make
REL670,
Numerical
Yes, Areva
make P442,
Numerical
Yes
Yes
Yes,
Yes,
Yes,
REL670 &
REL670 & REL670 &
P442
P442 Relay P442 Relay
Relay
Yes
1
1
Yes,
Yes,
Yes, REL670
REL670 & REL670 &
& P442 Relay
P442 Relay P442 Relay
Yes
2. Owner of Line/End: Meghalaya, MePTCL
Misa
1
Misa - Killing
(Byrnihat) I
220
Killing
(Byrnihat)
Misa
2
Misa - Killing
(Byrnihat) II
220
Killing
(Byrnihat)
220 kV Transmission Line Protection Details
Annexure II
Protection Details
Sl.
No.
Name of Line
Directional
Main I
Main II
Instantaneous Two stage
Charged End specified
Protection
Protection
Definite
OverVoltage in
for
Minimum
Voltage
kV
Protection exists (Type of exists (Type
Relay and
of Relay and Time(IDMT) Protection
Make)
Make)
type Earth
exists
(Yes/No)
(Yes/No)
Fault Relay
(Yes/No)
exists (Yes/No)
Data Recording System Details
Auto
Reclosing
(Single
Phase /
Three
Phase)
exists
(Yes/No)
Carrier
aided
Intertripping
exists
(Yes/No)
Yes, 7SA513
Yes
Yes
Yes
Yes
Yes
Yes, 7SA513
Yes
Yes
Yes
Yes
Yes
Yes, 7SA513
Yes
Yes
Yes
Yes
Yes
Yes, 7SA513
Yes
Yes
Yes
Yes
Yes
Yes, 7SA522
Yes
Yes
Yes
Yes
Yes
Yes, 7SA522
Yes
Yes
Yes
Yes
Yes
Yes, SIEMENS Yes, MICOM
7SA522
P442
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Event
Power
Number of Number of
Logger /
Swing
Pole
Disturbance
Core used Core used
Sequential
Blocking Discrepancy
Recorder
for CT & for CT &
Event
Feature Relay exists
exists
VT, used VT, used for
Recorder
exists
(Yes/No)
(Yes/No)
for Main I
Main II
exists
(Yes/No)
(Yes/No)
1. Owner of Line/End:
Line : Assam,
AEGCL
3.
POWERGRID
Yes, MICOM
P442
Yes, MICOM
Dimapur (PG)
P442
Yes, MICOM
Misa (PG)
P442
Yes, MICOM
Dimapur (PG)
P442
Yes, MICOM
Salakati (PG)
P442
Birpara (PG)
Yes, MICOM
Salakati (PG)
P442
Birpara (PG)
Misa (PG)
1
2
Misa - Dimapur I
Misa - Dimapur II
220
220
3
Salakti - Birpara I
220
4
Salakti - Birpara II
220
5
Misa - Mariani
(PG)
220
Misa (PG)
Mariani (PG)
Yes, MICOM
P444
Yes, REL 670
Note :1) Main-I Protection indicates Distance Protection
2) Main-II Protection indicates one of Distance Protection / Directional Comparison Protection / Phase Segregated Line Differential protection
3) Type of Relay indicates it's operational mechanism - Numerical / Static / Electro-mechanical
4) List of inbuilt features of Numerical Relays are also to be furnished alongwith this
Fault
Locator
exists
(Yes/No)
220 kV Transmission Line Protection Details
Annexure II
Protection Details
Sl.
No.
Name of Line
Directional
Main II
Instantaneous Two stage
Charged End specified
Main I Protection Protection
Definite
OverVoltage in
for
exists (Type of
exists (Type
Minimum
Voltage
kV
Protection
Relay and Make) of Relay and Time(IDMT) Protection
(Yes/No)
Make)
type Earth
exists
(Yes/No)
Fault Relay
(Yes/No)
exists (Yes/No)
Data Recording System Details
Auto
Reclosing
(Single
Phase /
Three
Phase)
exists
(Yes/No)
Carrier
aided
Intertripping
exists
(Yes/No)
Event
Power
Number of Number of
Logger /
Swing
Pole
Disturbance
Core used Core used
Sequential
Blocking Discrepancy
Recorder
for CT & for CT &
Event
Feature Relay exists
exists
VT, used VT, used for
Recorder
exists
(Yes/No)
(Yes/No)
for Main I
Main II
exists
(Yes/No)
(Yes/No)
Fault
Locator
exists
(Yes/No)
1. Owner of End : Assam, AEGCL & POWERGRID
Mariani (PG)
1 Mariani-Samaguri I
220
Samaguri
2
Mariani-Samaguri
II
Mariani (PG)
No
Yes (IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
No
Yes (IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
Yes(P442
MICOM)
Yes (IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
Balipara (PG) Yes, MICOM P442 Yes, 7SA513
Yes
Yes
Yes
Yes
Yes
Yes, SIMENS
7SA522
Yes
Yes
Yes
Yes
Yes
220
Samaguri
Samaguri
3
4
5
6
Samaguri-Balipara
Misa-Samaguri I
Misa-Samaguri II
Salakti - BTPS I
220
220
220
220
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Yes (7SA52
SIEMENS)
Misa (PG)
Yes, MICOM
Samaguri
Yes, MICOM
Yes, 7SA522
Yes
Yes
Yes
Yes
Yes
Misa (PG)
Yes, MICOM
Yes, SIMENS
7SA522
Yes
Yes
Yes
Yes
Yes
Samaguri
Yes, MICOM
Yes, 7SA522
Yes
Yes
Yes
Yes
Yes
Salakati (PG) Yes, MICOM P442 Yes, 7SA522
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
BTPS
7
Salakti - BTPS II
220
Salakati (PG) Yes, MICOM P442 Yes, 7SA522
BTPS
8
Misa - Mariani
220
Misa (PG)
Yes, SIEMENS
7SA522
Yes, MICOM
P442
Mariani
2. Owner of End : Assam, AEGCL & NEEPCO
Tinsukia
1
Tinsukia-AGBPP I
220
AGBPP I
2
3
Tinsukia-AGBPP
II
220 kV AGBPP Mariani
Tinsukia
220
AGBPP II
220
AGBPP
Mariani
Yes(7SA
SIEMENS)
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
Yes(SEL-321
EASUN REY)
Yes(SI
PROTECH
SIEMENS)
Yes(IDMT)
No
Yes(1-PH)
Yes
Yes
Yes
2
3
Yes
Yes
Yes
No
Yes(IDMT)
No
No
No
Yes
Yes
1
1
Yes
Yes
Yes
-
Yes(IDMT)
No
Yes
Yes
Yes
Yes
2
-
Yes
Yes
Yes
Yes (P443
ALSTOM)
Yes
No
Yes
Yes
Yes
Yes
1
2
Yes
Yes
Yes
Yes(SEL-321
SWITZER)
Yes(SEL-321
EASUN)
Yes (P442
ALSTOM)
220 kV Transmission Line Protection Details
Annexure II
Protection Details
Sl.
No.
Name of Line
Directional
Main II
Instantaneous Two stage
Charged End specified
Main I Protection Protection
Definite
OverVoltage in
for
exists (Type of
exists (Type
Minimum
Voltage
kV
Protection
Relay and Make) of Relay and Time(IDMT) Protection
(Yes/No)
Make)
type Earth
exists
(Yes/No)
Fault Relay
(Yes/No)
exists (Yes/No)
Auto
Reclosing
(Single
Phase /
Three
Phase)
exists
(Yes/No)
Data Recording System Details
Carrier
aided
Intertripping
exists
(Yes/No)
Event
Power
Number of Number of
Logger /
Swing
Pole
Disturbance
Core used Core used
Sequential
Blocking Discrepancy
Recorder
for CT & for CT &
Event
Feature Relay exists
exists
VT, used VT, used for
Recorder
exists
(Yes/No)
(Yes/No)
for Main I
Main II
exists
(Yes/No)
(Yes/No)
Fault
Locator
exists
(Yes/No)
1. Owner of End:
End :Meghalaya,
Assam, AEGCL
& POWERGRID
3.
MePTCL
& POWERGRID
Misa (PG)
1
Misa - Killing
(Byrnihat) I
220
Killing
(Byrnihat)
Yes
Yes,
Yes,
Yes,
REL670 &
REL670 & REL670 &
P442
P442 Relay P442 Relay
Relay
Yes
1
1
Yes,
Yes,
Yes, REL670
REL670 & REL670 &
& P442 Relay
P442 Relay P442 Relay
Yes
Yes
Yes,
Yes,
Yes,
REL670 &
REL670 & REL670 &
P442
P442 Relay P442 Relay
Relay
Yes
1
1
Yes,
Yes,
Yes, REL670
REL670 & REL670 &
& P442 Relay
P442 Relay P442 Relay
Yes
Yes
Yes
Yes
Yes
1
2
Yes
Yes
Yes
No
No
No
Yes, MICOM
P442
Yes
Yes
Yes, MICOM
P442
Yes
Yes, MICOM
P442
Yes
Yes, ABB make
REL670,
Numerical
Yes, Areva
make P442,
Numerical
Yes, ABB make
REL670,
Numerical
Yes, Areva
make P442,
Numerical
Yes
Misa (PG)
2
Misa - Killing
(Byrnihat) II
220
Killing
(Byrnihat)
4. Owner of End: POWERGRID & NEEPCO
AGBPP
Yes
Yes
220 kV AGBPP 1
220
Mariani(PG)
Mariani (PG) Yes, MICOM P444 Yes, REL 670
5. Owner of End: DoP,Arunachal Pradesh & NEEPCO
EPAC 3000
220 kV AGBPP AGBPP
1
220
ALSTOM
Deoamli
Deomali
6. Owner of End: POWERGRID & NEEPCO
Yes, SIMENS
Misa (PG)
1
Misa - Kopili I
220
7SA522
Kopili
Yes, SIMENS
Misa (PG)
2
Misa - Kopili II
220
7SA522
Kopili
3
Misa - Kopili III
220
Misa (PG)
Yes, 7SA513
SHPM 101
ALSTOM
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Kopili
Note :1) Main-I Protection indicates Distance Protection
2) Main-II Protection indicates one of Distance Protection / Directional Comparison Protection / Phase Segregated Line Differential protection
3) Type of Relay indicates it's operational mechanism - Numerical / Static / Electro-mechanical
4) List of inbuilt features of Numerical Relays are also to be furnished alongwith this format
Yes
1
2
Yes
Yes
400 kV Transmission Line Protection Details
Annexure II
Protection Details
Sl.
No.
Name of Line
Directional
Auto
Main
I
Main
II
Instantaneous
Two
stage
Reclosing
End
Carrier
Charged
Protection
Definite
Over(Single
specified Protection
aided InterVoltage
exists (Type exists (Type
Minimum
Voltage
Phase /
for
tripping
in kV
of Relay and of Relay and Time(IDMT) Protection
Three
Protection
exists
Make)
Make)
type Earth
exists
Phase)
(Yes/No)
(Yes/No)
(Yes/No)
Fault Relay
(Yes/No)
exists
exists (Yes/No)
(Yes/No)
Data Recording System Details
Power
Number
Swing
Pole
of Core
Blocking Discrepancy used for
Feature Relay exists CT & VT,
exists
(Yes / No)
used for
(Yes/No)
Main I
Event
Number of
Logger /
Core used Disturbance
Fault
Sequential
for CT & Recorder
Locator
Event
VT, used
exists
exists
Recorder
for Main
(Yes/No)
(Yes/No)
exists
II
(Yes/No)
1. Owner of Line : NETC
Azara
1
Silchar - Azara
400
Silchar
(PG)
2
Silchar - Killing
(Byrnihat)
400
Palatana- Silchar I
400
Silchar
(PG)
Yes (REL670 Yes (REL670
ABB)
ABB)
Yes
Yes
Yes
Yes, REL670
Yes
Yes
Yes
Yes, REL670
Yes
Yes
Yes,
MICOM
P444
Yes, REL670
Yes
Yes,
MICOM
P444
Yes, REL670
Yes,
MICOM
P444
Yes,
MICOM
P444
Yes,
MICOM
P444
Yes,
MICOM
P444
Yes
Yes
Yes
1
1
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes, REL670
Yes
Yes
Yes
Yes
Yes
Yes
Yes, REL670
Yes
Yes
Yes
Yes
Yes
Yes
Killing
(Byrnihat)
Palatana
3
Silchar
(PG)
Palatana
4
Palatana- Silchar II
400
Silchar
(PG)
Killing
(Byrnihat)
5
Killing- Bongaigaon
400
Bongaigaon
(PG)
Azara
6
Azara- Bongaigaon
400
Bongaigaon
(PG)
Yes
400 kV Transmission Line Protection Details
Annexure II
Protection Details
Sl.
No.
Name of Line
Directional
Auto
Main I
Main II
Instantaneous Two stage Reclosing
End
Carrier
Charged
Protection
Definite
Over(Single
specified Protection
aided
InterVoltage
exists (Type exists (Type
Minimum
Voltage
Phase /
for
tripping
in kV
of
Relay
and
of
Relay
and
Time(IDMT)
Protection
Three
Protection
exists
Make)
Make)
type Earth
exists
Phase)
(Yes/No)
(Yes/No)
(Yes/No)
Fault Relay
(Yes/No)
exists
exists (Yes/No)
(Yes/No)
Data Recording System Details
Power
Number
Swing
Pole
of Core
Blocking Discrepancy used for
Feature Relay exists CT & VT,
exists
(Yes / No)
used for
(Yes/No)
Main I
Event
Number of
Logger /
Core used Disturbance
Fault
Sequential
for CT & Recorder
Locator
Event
VT, used
exists
exists
Recorder
for Main
(Yes/No)
(Yes/No)
exists
II
(Yes/No)
1. Owner of Line : POWERGRID
NETC
2.
1
2
3
4
5
6
Bongaigaon- Binaguri
I
Bongaigaon- Binaguri
II
Bongaigaon- Binaguri
III
Bongaigaon- Binaguri
IV
Bongaigaon- Balipara
I
Bongaigaon- Balipara
II
400
Bongaigaon
(PG)
Yes,
MICOM
P442
Yes,
SIEMENS
7SA522
Yes
Yes
Yes
Yes
Yes
Yes
Yes,
MICOM
P442
Yes,
SIEMENS
7SA522
Yes
Yes
Yes
Yes
Yes
Yes
Yes,
MICOM
P444
Yes, REL670
Yes
Yes
Yes
Yes
Yes
Yes
Yes,
MICOM
P444
Yes, REL670
Yes
Yes
Yes
Yes
Yes
Yes
Yes, 7SA513
Yes
Yes
Yes
Yes
Yes
Yes
Yes,
SIEMENS
7SA522
Yes
Yes
Yes
Yes
Yes
Yes
Yes, 7SA513
Yes
Yes
Yes
Yes
Yes
Yes
Yes,
SIEMENS
7SA522
Yes
Yes
Yes
Yes
Yes
Yes
Binaguri
(PG)
400
Bongaigaon
(PG)
Binaguri
(PG)
400
Bongaigaon
(PG)
Binaguri
(PG)
400
Bongaigaon
(PG)
Binaguri
(PG)
Bongaigaon
(PG)
400
Balipara
(PG)
Bongaigaon
(PG)
400
Balipara
(PG)
Yes,
MICOM
P444
Yes,
MICOM
P442
Yes,
MICOM
P444
Yes,
MICOM
P442
400 kV Transmission Line Protection Details
Annexure II
Protection Details
Sl.
No.
Name of Line
1. Owner of Line : NETC
Directional
Auto
Main I
Main II
Instantaneous Two stage Reclosing
End
Carrier
Charged
Protection
Definite
Over(Single
specified Protection
aided InterVoltage
exists (Type exists (Type
Minimum
Voltage
Phase /
for
tripping
in kV
Three
Protection of Relay and of Relay and Time(IDMT) Protection
exists
Make)
Make)
type Earth
exists
Phase)
(Yes/No)
(Yes/No)
(Yes/No)
Fault Relay
(Yes/No)
exists
exists (Yes/No)
(Yes/No)
Data Recording System Details
Power
Number
Swing
Pole
of Core
Blocking Discrepancy used for
Feature Relay exists CT & VT,
exists
(Yes / No)
used for
(Yes/No)
Main I
Yes,
MICOM Yes, REL670
Yes
Yes
Yes
Yes
P444
Bongaigaon- Balipara
7
400
III
Yes,
Balipara
MICOM Yes, REL670
Yes
Yes
Yes
Yes
(PG)
P442
Yes,
Bongaigaon
MICOM Yes, REL670
Yes
Yes
Yes
Yes
(PG)
P444
Bongaigaon- Balipara
8
400
IV
Yes,
Balipara
MICOM Yes, REL670
Yes
Yes
Yes
Yes
(PG)
P442
Yes,
Balipara
MICOM Yes, REL670
Yes
Yes
Yes
Yes
(PG)
P444
9 Balipara- Ranganadi I
400
Yes,
Yes
MICOM
Yes, PD571,
Ranganadi
No
Yes
(Single
Yes
Yes
Yes
P442,
ALSTOM
Phase)
ALSTOM
Yes,
Balipara
MICOM Yes, REL670
Yes
Yes
Yes
Yes
(PG)
P444
10 Balipara- Ranganadi II
400
Yes,
Yes
MICOM
Yes, PD571,
Ranganadi
No
Yes
(Single
Yes
Yes
Yes
P442,
ALSTOM
Phase)
ALSTOM
Yes,
Balipara
MICOM Yes, REL670
Yes
Yes
Yes
Yes
(PG)
P444
11
Balipara- Misa I
400
Yes,
Yes, MICOM
Misa (PG) SIEMENS
Yes
Yes
Yes
Yes
P442
7SA522
Yes,
Balipara
MICOM Yes, REL670
Yes
Yes
Yes
Yes
(PG)
P444
12
Balipara- MIsa II
400
Yes,
Yes, MICOM
Misa (PG) SIEMENS
Yes
Yes
Yes
Yes
P442
7SA522
Note :1) Main-I Protection indicates Distance Protection
2) Main-II Protection indicates one of Distance Protection / Directional Comparison Protection / Phase Segregated Line Differential protection
3) Type of Relay indicates it's operational mechanism - Numerical / Static / Electro-mechanical
4) List of inbuilt features of Numerical Relays are also to be furnished alongwith this
Event
Number of
Logger /
Core used Disturbance
Fault
Sequential
for CT & Recorder
Locator
Event
VT, used
exists
exists
Recorder
for Main
(Yes/No)
(Yes/No)
exists
II
(Yes/No)
Bongaigaon
(PG)
1
1
1&2
1&2
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1. Owner of Transformer : Assam, AEGCL
400/220 kV Azara (Mirza)
LV side
1
2x315 MVA ICTs I & II
HV side
220/132 kV 1x100 MVA
LV side
Agia ICT
HV side
2
220/132 kV 1x50 MVA Agia LV side
ICT
HV side
220/132 kV 1x150 MVA
LV side
3
Balipara ICT
HV side
220/132 kV 1x50 MVA Boko LV side
4
ICT
HV side
220/132 kV 2x80 MVA
LV side
BTPS ICTs
HV side
5
220/132 kV 1x160 MVA
LV side
BTPS ICT
HV side
220/132 kV 2x100 MVA
LV side
6
Mariani ICTs
HV side
220/132 kV 2x50 NTPS
LV side
7
ICTs
HV side
220/132 kV 3x50 MVA
LV side
8
Samaguri ICTs
HV side
220/132 kV 3x100 MVA
LV side
9
Sarusajai ICTs
HV side
220/132 kV 2x50 MVA
LV side
10
Tinsukia ICT
HV side
220/33 kV 2x50 MVA GIS
LV side
11
(Jawaharnagar) ICT
HV side
132/33 kV 1x40 MVA Agia
LV side
ICT
HV side
12
132/33 kV 1X12.5 MVA Agia LV side
ICT
HV side
132/33 kV 1X12.5 MVA
LV side
APM (Ashok Paper Mill)
HV side
13
132/33 kV 1X16 MVA APM
LV side
(Ashok Paper Mill) ICT
HV side
132/33 kV 2X25 MVA
LV side
14
Barnagar ICTs
HV side
132/33 kV 2X16 MVA
LV side
15
Biswanath Chariali ICTs
HV side
132/33 kV 2X16 MVA
LV side
16
Bokakhat ICTs
HV side
132/33 kV 1X16 MVA
LV side
17
Bokajan ICT
HV side
132/33 kV 2X40 MVA Boko
LV side
18
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
18
1. Owner of Transformer
: Assam, AEGCL
ICTs
HV side
132/33 kV 1X16 MVA BTPS LV side
19
ICT
HV side
132/33 kV 1X16 MVA
LV side
Chandrapur (CTPS) ICT
HV side
20
132/33 kV 1X30 MVA
LV side
Chandrapur (CTPS) ICT
HV side
132/33 kV 2X31.5 MVA
LV side
21
Depota ICTs
HV side
132/33 kV 2X25 MVA
LV side
22
Dhaligaon ICTs
HV side
132/33 kV 2X16 MVA
LV side
23
Dhemaji ICTs
HV side
132/33 kV 2X31.5 MVA
LV side
24
Dibrugarh ICTs
HV side
132/33 kV 2X16 MVA Diphu LV side
25
ICTs
HV side
132/33 kV 3X3.5 MVA
LV side
26
Dullavcherra ICTs
HV side
132/33 kV 1X25 MVA
LV side
27
Garmur ICT
HV side
132/33 kV 2X16 MVA
LV side
28
Gauripur ICTs
HV side
132/33 kV 1X16 MVA
LV side
29
Ghoramari ICT
HV side
132/33 kV 1X16 MVA
LV side
30
Gohpur ICT
HV side
132/33 kV 1X10 MVA
LV side
31
Gohpur ICT
HV side
132/33 kV 2X25 MVA
LV side
32
Golaghat ICTs
HV side
132/33 kV 2X16 MVA
LV side
33
Gossaigaon (Joyma) ICTs
HV side
132/33 kV 2X10 MVA
LV side
34
Haflong ICTs
HV side
132/33 kV 2X16 MVA
LV side
35
Jagiroad (Baghjap) ICTs
HV side
132/33 kV 2X25 MVA Jorhat LV side
36
(Garmur) ICTs
HV side
132/33 kV 1X16 MVA Jorhat LV side
37
(Garmur) ICT
HV side
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1. Owner
of Transformer
: Assam, AEGCL
132/33
kV 1X31.5 MVA
LV side
38
Kahilipara ICT
HV side
132/33 kV 2X30 MVA
LV side
39
Kahilipara ICTs
HV side
132/33 kV 2X10 MVA Ledo
LV side
40
(Margherita) ICTs
HV side
132/33 kV 2X7.5 MVA LTPS LV side
41
ICTs
HV side
132/33 kV 4X5.5 MVA
LV side
42
Majuli (Single Phase) ICTs
HV side
132/33 kV 2X16 MVA Moran LV side
43
ICTs
HV side
132/33 kV 2X16 MVA
LV side
44
Nalbari ICTs
HV side
132/33 kV 2X25 MVA
LV side
45
Narengi ICTs
HV side
132/33 kV 2X25 MVA Nazira LV side
46
(Gargaon) ICTs
HV side
132/33 kV 2X10 MVA North
LV side
47
Lakhimpur (Nalkata) ICTs
HV side
132/33 kV 1X31.5 MVA
LV side
48
NTPS ICT
HV side
132/33 kV 3X10 MVA
LV side
49
Pailapool ICTs
HV side
132/33 kV 2X25 MVA
LV side
50
Panchgram New ICTs
HV side
132/33 kV 2X10 MVA
LV side
51
Panchgram Old ICTs
HV side
132/33 kV 2X25 MVA
LV side
52
Rangia ICTs
HV side
132/33 kV 2X25 MVA Rowta LV side
53
ICTs
HV side
132/33 kV 2X25 MVA
LV side
54
Samaguri ICTs
HV side
132/33 kV 1X16 MVA
LV side
55
Sankar Dev Nagar (Lanka)
HV side
132/33 kV 3X31.5 MVA
LV side
56
Sarusajai ICTs
HV side
132/33 kV 2X16 MVA
LV side
57
Sibsagar ICTs
HV side
132/33 kV 2X16 MVA
LV side
58
Sipajhar ICTs
HV side
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
No
No
No
No
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1. Owner
of Transformer
: Assam, AEGCL
132/33
kV 2X31.5 MVA
LV side
59
Sishugram (Amingaon) ICTs HV side
132/33 kV 1x40 MVA
LV side
60
Sishugram (Amingaon) ICT HV side
132/33 kV 2X25 MVA
LV side
61
Srikona ICTs
HV side
132/33 kV 2X25 MVA
LV side
62
Khaloigaon ICTs
HV side
132/33 kV 2X25 MVA Sonari LV side
63
ICTs
HV side
132/33 kV 2X40 MVA
LV side
64
Behaiting ICTs
HV side
132/66 kV 2X20 MVA
LV side
65
Mariani ICTs
HV side
132/66 kV 2X25 MVA NTPS LV side
66
ICTs
HV side
132/66 kV 1X20 MVA NTPS LV side
67
ICT
HV side
132/66 kV 3X20 MVA
LV side
68
Tinsukia ICTs
HV side
132/11 kV 2X16 MVA Dispur LV side
69
ICTs
HV side
132/11 kV 2X10 MVA
LV side
70
Kahilipara ICTs
HV side
66/33 kV 3X5 MVA Bokajan
LV side
71
ICTs
HV side
66/33 kV 2X5 MVA Diphu
LV side
72
ICTs
HV side
66/33 kV 2X10 MVA
LV side
73
Golaghat ICTs
HV side
66/33 kV 1X6.3 MVA
LV side
74
Golaghat ICT
HV side
66/33 kV 2X16 MVA Mariani LV side
75
ICTs
HV side
66/33 kV 2X16 MVA Nazira
LV side
76
(Gargaon) ICTs
HV side
66/33 kV 3X10 MVA NTPS
LV side
77
ICTs
HV side
66/33 kV 3X10 MVA Rupai
LV side
78
(Doomdooma) ICTs
HV side
66/33 kV 3x20 MVA
LV side
79
Tinsukia ICTS
HV side
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1. Owner of Transformer : MSPCL,
Assam, AEGCL
2.
Manipur
132/33 kV Churachandpur
LV side
(Kheljang) 1x20 MVA
HV side
1
132/33 kV Churachandpur
LV side
(Kheljang) 1x20 MVA
HV side
132/33 kV Jiribam 1x20
LV side
2
MVA Transformer
HV side
132/33 kV Kakching 1x20
LV side
MVA Transformer I
HV side
3
132/33 kV Kakching 1x20
LV side
MVA Transformer II
HV side
132/33 kV Karong 1x20
LV side
MVA Transformer I
HV side
4
132/33 kV Karong 1x20
LV side
MVA Transformer II
HV side
132/33 kV Ningthoukong
LV side
1x20 MVA Transformer I
HV side
5
132/33 kV Ningthoukong
LV side
1x12.5 MVA Transformer II
HV side
132/33 kV Rengpang 1x12.5
LV side
6
MVA Transformer
HV side
132/33 kV
LV side
Yaingangpokpi1x20 MVA
HV side
7
132/33 kV Yaingangpokpi
LV side
1x20 MVA Transformer-II
HV side
132/33 kV Yurembam 1x20
LV side
MVA Transformer I
HV side
132/33 kV Yurembam 1x20
LV side
8
MVA Transformer II
HV side
132/33 kV Yurembam 1x20
LV side
MVA Transformer III
HV side
132/33 kV Kongba1x20 MVA LV side
Transformer-I
HV side
9
132/33 kV Kongba1x20 MVA LV side
Transformer-II
HV side
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
NA
NA
NA
NA
NA
NA
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
NA
NA
NA
NA
NA
NA
NA
NA
NA
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Yes
Yes
Directional Over
Current Protection
exits (Yes/No)
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
1. Owner of Transformer : Meghalaya,
Assam, AEGCL
3.
MePTCL
400/220 kV Killing(Byrnihat) LV side
1x315 MVA Transformer I
HV side
400/220 kV Killing(Byrnihat) LV side
1x315 MVA Transformer II
HV side
1
220/132 kV Killing(Byrnihat)
1x160 MVA Transformer I
220/132 kV Killing(Byrnihat)
1x160 MVA Transformer II
2
132/33 kV Cherrapunjee
(Sohra) 1x12.5 MVA
Transformer
132/33 kV EPIP I 1x20 MVA
Transformer I
LV side
HV side
LV side
HV side
132/33 kV EPIP II 1x50
MVA Transformer
No
132/33 kV Khliehriat 1x20
MVA Transformer I
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
5
132/33 kV Khliehriat 1x20
MVA Transformer II
Yes
No
No
HV side
4
132/33 kV EPIP II 1x20
MVA Transformer
Yes
LV side
3
132/33 kV EPIP I 1x20 MVA
Transformer II
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
LV side
HV side
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes, Toshiba
make,
GRT100,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes
Yes
No
Yes
Yes
Yes
No
No
No
No
No
No
Non directional REX
ABB make
Non directional REX
ABB make
Non directional REX
ABB make
Non directional REX
ABB make
Non directional CDG,
EE make
Non directional CDG,
EE make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional CDG,
EE make
Non directional P122
Areva make
Non directional P122
Areva make
No
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
No
No
Yes
No
Yes
Yes
Yes
No
No
No
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
No
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1. Owner of Transformer : Assam, AEGCL
LV side 11
kV
132/33/11 kV Lumshnong
LV side 33
6
1x10 MVA Transformer
kV
Differential
Protection
exits
(Yes/No)
No
Over
Fluxing
Protection
exits
(Yes/No)
No
REF
Protection
exists
(Yes/No)
No
HV side
132/33 kV Mawlai 1x20
MVA Transformer I
7
132/33 kV Mawlai 1x20
MVA Transformer II
132/33 kV Mawlai 1x20
MVA Transformer III
132/33 kV Nangalbibra
1x12.5 MVA Transformer I
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Yes, EE
make, Static
type
No
Yes, Areva
make, P632,
Numerical
Yes
Yes, ABB
make,
RET670,
Numerical
Yes
Yes, EE
make, Static
type
Yes
Yes, Areva
make, P632,
Numerical
Yes
No
No
No
No
8
132/33 kV Nangalbibra
1x12.5 MVA Transformer II
132/33 kV NEHU 1x20
MVA Transformer I
LV side
HV side
LV side
HV side
9
132/33 kV NEHU 1x20
MVA Transformer II
10
132/33 kV Nongstoin 1x12.5
MVA Transformer
LV side
HV side
LV side
HV side
No
No
No
Yes
Directional Over
Current Protection
exits (Yes/No)
Non directional CDG,
EE make
Non directional JRC
059,JVS make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional CDG,
EE make
Non directional P122
Areva make
Non directional P122
Areva make
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
No
No
Yes
Yes
No
Yes
Yes
No
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
No
Yes
No
No
No
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Transformer Protection Details
Over
Fluxing
Protection
exits
(Yes/No)
LV side/
HV side
Differential
Protection
exits
(Yes/No)
1. Owner of Transformer : Assam, AEGCL
LV side
132/33 kV Rongkhon (Tura)
1x20 MVA Transformer I
HV side
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Yes, EE
make, Static
type
Yes
Yes, EE
make, Static
type
Yes
Yes, EE
make, Static
type
Yes
Yes, Toshiba
make,
GRT100,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Sl.
No.
Name of Transformer
132/33 kV Rongkhon (Tura)
1x20 MVA Transformer II
11
132/33 kV Rongkhon (Tura)
1x5 MVA Transformer I
132/33 kV Rongkhon (Tura)
1x5 MVA Transformer II
132/33 kV Rongkhon (Tura)
1x5 MVA Transformer III
132/33 kV Umiam 1x20
MVA Transformer I
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
12
132/33 kV Umiam 1x20
MVA Transformer II
132/33/11 kV NEIGRIHMS
1x10 MVA Transformer I
LV side
HV side
LV side
HV side
REF
Protection
exists
(Yes/No)
No
No
No
No
No
No
No
No
13
132/33/11 kV NEIGRIHMS
1x10 MVA Transformer II
LV side
HV side
No
Directional Over
Current Protection
exits (Yes/No)
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional CDG,
EE make
Non directional, CDG
EE make
Non directional
JNC066, JVS make
Non directional
JNC066, JVS make
Non directional P141
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
No
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Np
No
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1. Owner of Transformer : Assam, AEGCL
LV side
132/33 kV Mawngap 1x20
MVA Transformer I
HV side
14
LV side
132/33 kV Mawngap 1x20
MVA Transformer II
HV side
132/33 kV Umiam Stg I
1x10.6 MVA Transformer I
132/33 kV Umiam Stg I
1x10.6 MVA Transformer II
LV side
HV side
LV side
HV side
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
Yes, Areva
make, P632,
Numerical
Yes
REF
Protection
exists
(Yes/No)
No
No
No
No
15
132/33 kV Umiam Stg I
1x10.6 MVA Transformer III
132/33 kV Umiam Stg I
1x10.6 MVA Transformer IV
132/33 kV Umiam Stg II
1x10.5 MVA Transformer I
LV side
HV side
LV side
HV side
LV side
HV side
16
132/33 kV Umiam Stg II
1x10.5 MVA Transformer II
132/33 kV Umiam Stg III
1x37.5 MVA Transformer I
LV side
HV side
LV side
HV side
17
132/33 kV Umiam Stg III
1x37.5 MVA Transformer II
LV side
HV side
Digital M3311,
Beckwith
Electric Co.
Digital M3311,
Beckwith
Electric Co.
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
No
No
Directional Over
Current Protection
exits (Yes/No)
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Yes, Directional P141,
Areva make
Beckwith Electric Co.
Yes
Yes
Yes
No
No
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Non directional CDG,
EE make
Non directional CDG,
EE make
Non directional CDG,
EE make
Non directional CDG,
EE make
Yes
Yes
No
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Beckwith Electric Co.
Yes
Yes
No
No
Yes
Yes
Yes
Beckwith Electric Co.
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
Beckwith Electric Co.
Yes
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
Yes
No
Yes
Yes
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1. Owner of Transformer : Assam, AEGCL
LV side
132/33 kV Umiam Stg IV
1x37.5 MVA Transformer I
HV side
18
LV side
132/33 kV Umiam Stg IV
1x37.5 MVA Transformer II
HV side
132/33 kV Umtru 1x7.5 MVA
Transformer I
LV side
HV side
19
132/33 kV Umtru 1x7.5 MVA
Transformer II
132/33 kV Leshka 1x45 MVA
Transformer I
132/33 kV Leshka 1x45 MVA
Transformer II
20
132/33 kV Leshka 1x45 MVA
Transformer III
132/33 kV Leshka 1x45 MVA
Transformer I
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
4. Owner of Transformer : P&E, Mizoram
132/33 kV Bairabi, 3.15 MVA LV side
Transformer
HV side
132/11 kV Bairabi, 15 MVA
LV side
1
Transformer 1
HV side
132/11 kV Bairabi, 15 MVA
LV side
Transformer 2
HV side
Differential
Protection
exits
(Yes/No)
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Yes, ABB
make,
RET670,
Numerical
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Directional Over
Current Protection
exits (Yes/No)
Non directional CDG,
EE make
Non directional CDG,
EE make
Non directional CDG,
EE make
Non directional CDG,
EE make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional P122
Areva make
Non directional REX
ABB make
Non directional REX
ABB make
Non directional REX
ABB make
Non directional REX
ABB make
Non directional REX
Non directional REX
ABB make
Non directional REX
ABB make
Non directional REX
ABB make
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
No
No
No
Yes
No
No
No
Yes
No
No
No
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1. Owner of132/66
Transformer
: Assam, AEGCL
kV Kolasib
LV side
(Bawktlang) 12.5 MVA
HV side
132/33 kV Kolasib
LV side
2
(Bawktlang) 12.5 MVA
HV side
66/33 kV Kolasib
LV side
(Bawktlang) 6.3 MVA
HV side
132/33 kV Serchip (Bukpui)
LV side
12.5 MVA Transformer I
HV side
3
132/33 kV Serchip (Bukpui)
LV side
6.3 MVA Transformer II
HV side
132/33 kV Lunglei (Khawiva) LV side
12.5 MVA Transformers I
HV side
4
132/33 kV Lunglei (Khawiva) LV side
12.5 MVA Transformers II
HV side
132/33 kV Khawzawl 12.5
LV side
5
MVA Transformers I
HV side
132/33 kV Luangmual, 12.5
LV side
MVA Transformers I
HV side
132/33 kV Luangmual, 12.5
LV side
6
MVA Transformers II
HV side
132/33 kV Luangmual, 12.5
LV side
MVA Transformers III
HV side
132/33 kV Saitual 1x6.3
LV side
7
MVA Transformer
HV side
132/33 kV Zemabawk
LV side
(Zuangtui) 12.5 MVA
HV side
8
132/33 kV Zemabawk
LV side
(Zuangtui) 12.5 MVA
HV side
5. Owner of Transformer : NEEPCO
53 MVA, 11 kV/132 kV
LV side
1 Generator Transformer at
HV side
Ranganadi
2
3
400 kV/132 kV, 120 MVA
ICT-I at Ranganadi
400 kV/132 kV, 120 MVA
ICT-II at Ranganadi
11/220 kV, 50 MVA
4 Generator Transformer 1 at
AGBPP
11/220 kV, 50 MVA
5 Generator Transformer 2 at
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
No
No
No
No
Yes
Yes
No
No
No
No
Yes
Yes
No
No
No
No
Yes
Yes
No
No
No
No
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
LV side
Yes
Yes
HV side
No
LV side
Yes
Yes
HV side
No
LV side
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
LV side
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes (
Neutral
Displacemen
t Protection)
Yes (
Neutral
Displacemen
t Protection)
No
No
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
5 Generator Transformer 2 at
1. Owner of Transformer : Assam, AEGCL
HV side
AGBPP
11/220 kV, 50 MVA
LV side
6 Generator Transformer 3 at
HV
side
AGBPP
11/220 kV, 50 MVA
LV side
7 Generator Transformer 4 at
HV side
AGBPP
8
9
10
11
12
13
14
11/220 kV, 50 MVA
Generator Transformer 5 at
AGBPP
11/220 kV, 50 MVA
Generator Transformer 6 at
AGBPP
11/220 kV, 50 MVA
Generator Transformer 7 at
AGBPP
11/220 kV, 50 MVA
Generator Transformer 8 at
AGBPP
11/220 kV, 50 MVA
Generator Transformer 9 at
AGBPP
11/132 kV, 3x12.5(37.5)
MVA Generator Transformer
1 at AGTPP
11/132 kV, 3x12.5(37.5)
MVA Generator Transformer
2 at AGTPP
11/132 kV, 3x12.5(37.5)
15 MVA Generator Transformer
3 at AGTPP
11/132 kV, 3x12.5(37.5)
16 MVA Generator Transformer
4 at AGTPP
6. Owner of Transformer : NHPC
1
11/132 kV, Generator
Transformer at Loktak
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
LV side
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
LV side
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
LV side
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
LV side
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
LV side
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
LV side
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
LV side
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
LV side
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
LV side
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
HV side
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
No
No
Yes
No
Yes
LV side
HV side
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1.
AEGCL
7. Owner of Transformer : Assam,
POWERGRID
400/220kV, 315 MVA ICT at
LV side
1
Bongaigaon
HV side
400/220kV, 315 MVA ICT at
LV side
2
Balipara
HV side
220/132, 50 MVA ICT 1 at
LV side
3
Balipara (NEEPCO asset)
HV side
220/132, 50 MVA ICT2 at
LV side
4
Balipara (AEGCL asset)
HV side
400/220kV, 315 MVA ICT 1
LV side
5
at Misa
HV side
400/220kV, 315 MVA ICT 2
LV side
6
at Misa
HV side
400/220kV, 200 MVA ICT 1
LV side
5
at Silchar
HV side
400/220kV, 200 MVA ICT 2
LV side
6
at Silchar
HV side
220/132kV, 50 MVA ICT 1
LV side
7
at Salakati
HV side
8
9
10
11
12
13
14
15
16
17
LV side
220/132kV, 50 MVA ICT 2
at Salakati
HV side
220/132kV, 100 MVA ICT 1
at Dimapur
220/132kV, 100 MVA ICT 2
at Dimapur
132/33 kV, 15 MVA ICT at
Ziro
132/33 kV, 5 MVA ICT at
Kumarghat
132/33 kV, 16 MVA ICT at
Nirjuli
132/33 kV, 10 MVA ICT at
Nirjuli
220/132 kV, 160 MVA ICT at
Kopili
132/33 kV, 50 MVA ICT 1 at
Imphal
132/33 kV, 50 MVA ICT 2 at
Imphal
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
Yes, P643
Yes
Yes, P643
Yes
Yes, DuoBias-M
Yes, DuoBias-M
Yes
Yes
Yes, P643
Yes
Yes, P633
P127
Yes, P633
Yes
Yes, P633
P127
Yes, P643
Yes
Yes, DuoBias-M/PC
05770
Yes
Yes, DTH-31
Yes
Yes, RET670
Yes
Yes, P643
Yes
Yes, DTH
Yes
Yes, P643
Yes
Yes, P643
Yes
Yes, RET670
Yes
Yes, P632
P127
Yes, P632
P127
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
1. Owner of Transformer : TSECL
Assam, AEGCL
8.
25 MVA
132/33 KV
1
Budhjungnagar
25 MVA
132/33 KV
15 MVA
132/33 KV
2
Jirania
15 MVA
132/11 KV
15 MVA
3
Gamaitila
132/11 KV
25 MVA
132/33 KV
4
Ambassa
7.5/2.5/5
MVA
15 MVA
132/33 KV
5
P K Bari
15 MVA
132/11 KV
15 MVA
132/33 KV
7.5/2.5/5
6
Kailashahar
MVA
7.5/2.5/5
MVA
7.5/2.5/5
MVA
7.5/2.5/5
MVA
7
Missiontilla
7.5/2.5/5
MVA
25 MVA
132/33 KV
10 MVA
132/11
KV
8
Kamalpur
10 MVA
132/11 KV
15 MVA
132/11 KV
9
Dhalabil
7.5 MVA
132/33 KV
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
LV side
HV side
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
Yes
No
Yes
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
Yes at
tertiary
No
No
No
No
No
No
Yes at
tertiary
Yes at
tertiary
Yes at
tertiary
Yes at
tertiary
Yes at
tertiary
No
No
No
No
No
No
No
No
No
No
Transformer Protection Details
Sl.
No.
Name of Transformer
LV side/
HV side
Differential
Protection
exits
(Yes/No)
Over
Fluxing
Protection
exits
(Yes/No)
REF
Protection
exists
(Yes/No)
Directional Over
Current Protection
exits (Yes/No)
Annexure II
MOG
Tertiary
Impedance Buchholz
WTI
OTI
with low OSR for
Overload
PRD
Winding
Protection Operation Protection Protection oil level
OLTC
SA exists
Alarm
exists
Protection
exists
exits
exists
exists
alarm
exists
(Yes/No)
exists
(Yes/No)
exists
(Yes/No)
(Yes/No) (Yes/No) (Yes/No)
exists
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
1. Owner of Transformer : Assam, AEGCL
15 MVA
LV side
Yes
No
No
No
No
No
No
132/11 KV
HV side
Yes
No
Yes
No
No
Yes
Yes
10
Udaipur
15 MVA
LV side
Yes
No
No
No
No
No
No
132/11 KV
HV side
Yes
No
Yes
No
No
Yes
Yes
50 MVA
LV side
Yes
No
Yes
No
No
No
No
132/33 KV
HV side
Yes
No
No
No
No
Yes
Yes
11
Surjyamaninagar
50 MVA
LV side
Yes
No
Yes
No
No
No
No
132/33 KV
HV side
Yes
No
No
No
No
Yes
Yes
25 MVA
LV side
Yes
No
No
No
No
No
No
132/33 KV
HV side
Yes
No
Yes
No
No
Yes
Yes
15 MVA
LV side
Yes
No
No
No
No
No
No
132/11 KV
HV side
Yes
No
Yes
No
No
Yes
Yes
15 MVA
LV side
Yes
No
No
No
No
No
No
132/33 KV
HV side
Yes
No
Yes
No
No
Yes
Yes
12
Grid, 79 Tilla
15 MVA
LV side
Yes
No
No
No
No
No
No
132/33 KV
HV side
Yes
No
Yes
No
No
Yes
Yes
15 MVA
LV side
Yes
No
No
No
No
No
No
132/33 KV
HV side
Yes
No
Yes
No
No
Yes
Yes
25 MVA
LV side
Yes
No
No
No
No
No
No
132/33 KV
HV side
Yes
No
Yes
No
No
Yes
Yes
Note : 1. REF : Restricted Earth Fault, 2. WTI : Winding Temperature Indicator., 3. OTI : Oil Temperature Indicator)
4. MOG : Magnetic Oil Gauge, 5. OSR : Oil Surge Relay, 6. OLTC : On Load Tap Changer
7. PRD : Pressure Relieve Device, 8. SA : Surge Arrestor 9. List of inbuilt features of Numerical Relays are also to be furnished alongwith this format
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Reactor Protection Details
Sl.
No.
Name of Line Reactor/ Bus
Reactor/ Tertiary Reactor
Differential
Protection
exists
(Yes/No)
Annexure II
REF
Definite Time Earth Fault Buchholz
WTI
OTI
MOG with
Protection Over Current
Protection Operation Protection Protection low oil level SA exists
exists
Protection exists
exists
exists
exists
exists
alarm exists (Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
1. Owner of Reactor : Assam, AEGCL
400 kV Silchar - Azara (Mirza)
1 line reactor of 63 MVAR at
Yes
Yes
Azara (Mirza) end
Bus Reactor of 63 MVAR at
2
Yes
Yes
Azara (Mirza)
Bus Reactor I & II of 12.5
3
MVAR at Mariani
Bus Reactor I & II of 12.5
4
MVAR at Samaguri
Bus Reactor I & II of 12.5
5
MVAR at Mariani
2. Owner of Reactor/ Capacitor Bank : Meghalaya, MePTCL
63 MVAR Bus Reactor at
1
Killing (Byrnihat)
132KV Capacitor Bank at
2
No
No
Mawlai
132KV Capacitor Bank at EPIP
3
No
No
I
132KV Capacitor Bank at EPIP
4
No
No
II
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
REACTOR NOT IN OPERATION
REACTOR NOT IN OPERATION
REACTOR NOT IN OPERATION
Yes
Yes
No
No
No
No
Yes
Yes
Yes
No
No
No
No
Yes
Yes
Yes
No
No
No
No
Yes
Reactor Protection Details
Sl.
No.
Name of Line Reactor/ Bus
Reactor/ Tertiary Reactor
Differential
Protection
exists
(Yes/No)
1. Owner of Reactor :NEEPCO
: Assam, AEGCL
3.
50 MVAR line Reactor -I in
1 400 kV Balipara-RHEP I at
Yes
Ranganadi end
50 MVAR line Reactor -II in
2 400 kV Balipara-RHEP II at
Yes
Ranganadi end
4. Owner of BUS Reactors :POWERGRID
Yes,
50 MVAR 400 kV Bus Reactor1
Differential
I at Bongaigaon SS
(CAG)
Yes,
50 MVAR 400kV Bus Reactor2
Differential
II at Bongaigaon SS
(CAG)
Yes,
80 MVAR 400 kV Bus Reactor3
Differential
3 at Bongaigaon SS
(CAG)
Yes,
80 MVAR 400kV Bus Reactor4
Differential
4 at Bongaigaon SS
(CAG)
Yes,
50 MVAR 400kV Bus Reactor5
Differential
1 Balipara SS
(CAG)
Yes,
80 MVAR 400kV Bus Reactor6
Differential
2 Balipara SS
(CAG)
Yes,
50 MVAR 400kV Bus Reactor
7
Differential
Misa SS
(CAG)
Annexure II
REF
Definite Time Earth Fault Buchholz
WTI
OTI
MOG with
Protection Over Current
Protection Operation Protection Protection low oil level SA exists
exists
Protection exists
exists
exists
exists
exists
alarm exists (Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Reactor Protection Details
Sl.
No.
Name of Line Reactor/ Bus
Reactor/ Tertiary Reactor
Differential
Protection
exists
(Yes/No)
1. Owner of Reactor : Assam, AEGCL Yes,
63 MVAR 400kV Bus Reactor8
Differential
1 Sichar SS
(CAG)
Yes,
63 MVAR 400kV Bus Reactor9
Differential
2 Sichar SS
(P633)
Yes,
20 MVAR 220 kV Bus Reactor
10
Differential
at Mariani SS
(P632)
Yes,
20 MVAR 132kV Bus Reactor
11
Differential
Kumarghat SS
(CAG)
Yes,
20 MVAR 132kV Bus Reactor
12
Differential
Aizwal SS
(CAG)
Yes,
20 MVAR 132kV Bus Reactor
13
Differential
Imphal SS
(P633)
Yes,
20 MVAR 132kV Bus Reactor
14
Differential
Ziro SS
(P633)
Yes,
15 25 MVAR 33kV Reactor-Misa Differential
(CAG)
Yes,
25 MVAR 33kV Reactor16
Differential
Balipara
(CAG)
Annexure II
REF
Definite Time Earth Fault Buchholz
WTI
OTI
MOG with
Protection Over Current
Protection Operation Protection Protection low oil level SA exists
exists
Protection exists
exists
exists
exists
exists
alarm exists (Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
Reactor Protection Details
Sl.
No.
Name of Line Reactor/ Bus
Reactor/ Tertiary Reactor
Differential
Protection
exists
(Yes/No)
1. Owner of Reactor : Assam, AEGCL Yes,
25 MVAR 33kV Reactor17
Differential
Bongaiagaon
(CAG)
5. Owner of Line Reactors: POWERGRID
Yes ,
Differential
(CAG)
Yes,
50 MVAR 400 KV D/C MisaDifferential
Mariani
(CAG)
Yes,
63/50 MVAR 400 KV D/C
Differential
Balipara-Bongaigaon-I
(CAG34AF71
A)
Yes,
63/50 MVAR 400 KV D/C
Differential
Balipara-Bongaigaon-II
(CAG34AF71
A)
Yes,
63 MVAR 400 KV D/C
Differential
Balipara-Bongaigaon-3
(CAG34AF71
A)
Yes,
63 MVAR 400 KV D/C
Differential
Balipara-Bongaigaon-4
(CAG34AF71
A)
Yes,
50 MVAR 400KV D/C
Differential
Balipara-Ranganadi-I
(DTH31)
50 MVAR 400 KV D/C Misa1
Kathalguri
2
3
4
5
6
7
Annexure II
REF
Definite Time Earth Fault Buchholz
WTI
OTI
MOG with
Protection Over Current
Protection Operation Protection Protection low oil level SA exists
exists
Protection exists
exists
exists
exists
exists
alarm exists (Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
Reactor Protection Details
Sl.
No.
Name of Line Reactor/ Bus
Reactor/ Tertiary Reactor
Differential
Protection
exists
(Yes/No)
1. Owner of Reactor : Assam, AEGCL Yes,
50 MVAR 400KV D/C
8
Differential
Balipara-Ranganadi-II
(DTH31)
Yes,
63 MVAR 400kV Bongaigaon9
Differential
Siliguri - I
(CAG3471)
Yes,
63 MVAR 400kV Bongaigaon10
Differential
Siliguri - II
(CAG3471)
Yes,
63 MVAR 400kV Bongaigaon11
Differential
Azara
(CAG3471)
Yes,
63 MVAR 400kV Bongaigaon12
Differential
Byrnihat
(CAG3471)
Yes,
50 MVAR 400kV SilChar13
Differential
Azara
(CAG3471)
Yes,
50 MVAR 400kV Sichar14
Differential
Byrnihat
(CAG3471)
Yes,
50 MVAR 400kV SilChar13
Differential
Pallatana-1
(P633)
Yes,
50 MVAR 400kV SilChar14
Differential
Pallatana-1
(P633)
Annexure II
REF
Definite Time Earth Fault Buchholz
WTI
OTI
MOG with
Protection Over Current
Protection Operation Protection Protection low oil level SA exists
exists
Protection exists
exists
exists
exists
exists
alarm exists (Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
Reactor Protection Details
Sl.
No.
Name of Line Reactor/ Bus
Reactor/ Tertiary Reactor
Differential
Protection
exists
(Yes/No)
Annexure II
REF
Definite Time Earth Fault Buchholz
WTI
OTI
MOG with
Protection Over Current
Protection Operation Protection Protection low oil level SA exists
exists
Protection exists
exists
exists
exists
exists
alarm exists (Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
(Yes/No)
1. Owner of Reactor : Assam, AEGCL
Note : 1. REF : Restricted Earth Fault, 2. WTI : Winding Temperature Indicator., 3. OTI : Oil Temperature Indicator)
4. MOG : Magnetic Oil Gauge, 5. SA : Surge Arrestor
6. List of inbuilt features of Numerical Relays are also to be furnished alongwith this format
Annexure II
Bus Bar & Local Breaker Backup(LBB) Protection Details
Sl.No. Name of Substation
Voltage level
1. Owner of Bus Bar: MSPCL, Manipur
132 kV Bus Bar
1
Churachandpur
33 kV Bus Bar
132 kV Bus Bar
2
Jiribam
33 kV Bus Bar
132 kV Bus Bar
3
Kakching
33 kV Bus Bar
132 kV Bus Bar
4
Karong
33 kV Bus Bar
132 kV Bus Bar
5
Ningthoukong
33 kV Bus Bar
132 kV Bus Bar
6
Rengpang
33 kV Bus Bar
132 kV Bus Bar
7
Yaingangpokpi
33 kV Bus Bar
132 kV Bus Bar
8
Yurembam.
33 kV Bus Bar
132 kV Bus Bar
9
Kongba
33 kV Bus Bar
2. Owner of Bus Bar: MePTCL, Meghalaya
1
Mawlai
132 kV Bus Bar
Bus Bar Protection
exists (Yes/No)
LBB Protection exists
(Yes/No)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
2
NEHU
132 kV Bus Bar
No
No
3
NEIGRIHMS
132 kV Bus Bar
No
No
4
Khliehriat
132 kV Bus Bar
No
No
5
Lumshnong
132 kV Bus Bar
No
No
6
Umiam
132 kV Bus Bar
No
No
7
Mawphlang
132 kV Bus Bar
No
No
8
Cherra
132 kV Bus Bar
No
No
9
Nongstoin
132 kV Bus Bar
No
No
10
Nangal
132 kV Bus Bar
No
No
11
Rongkhon
132 kV Bus Bar
No
No
12
EPIP-I
132 kV Bus Bar
No
No
13
EPIP-II
132 kV Bus Bar
No
No
14
Stage-I PH
132 kV Bus Bar
No
No
15
Stage-II PH
132 kV Bus Bar
No
No
16
Stage-III PH
132 kV Bus Bar
No
No
17
Stage-IV PH
132 kV Bus Bar
No
No
18
Umtru PH
132 kV Bus Bar
No
No
19
Leshka PH
132 kV Bus Bar
No
No
Bus Bar & Local Breaker Backup(LBB) Protection Details
Sl.No. Name of Substation
Voltage level
1. Owner of Bus Bar: MSPCL,
132Manipur
kV Bus Bar
20 Killing
220 kV Bus Bar
3. Owner of Bus Bar: P&E, Mizoram
132 kV Bus Bar
1
Kolasib
66 kV Bus Bar
33 kV Bus Bar
132 kV Bus Bar
2
Luangmual
33 kV Bus Bar
132 kV Bus Bar
3
Lunglei
33 kV Bus Bar
132 kV Bus Bar
4
Serchip
33 kV Bus Bar
132 kV Bus Bar
5
Saitul
33 kV Bus Bar
132 kV Bus Bar
6
Zemabawk
33 kV Bus Bar
132 kV Bus Bar
7
Bairabi
33 kV Bus Bar
132 kV Bus Bar
8
Khawzawl
33 kV Bus Bar
4. Owner of Bus Bar: NEEPCO
400 kV Bus Bar
1
Ranganadi
132 kV Bus Bar
2
AGBPP
220 kV Bus Bar
3
AGTPP
132 kV Bus Bar
5. Owner of Bus Bar: NHPC
1
Loktak
132 kV Bus Bar
6. Owner of Bus Bar: POWEWRGRID
1
Aizawl
132 kV Bus Bar
2
Badarpur
132 kV Bus Bar
400 kV Bus Bar
3
Balipara
220 kV Bus Bar
4
Bongaigaon
400 kV Bus Bar
5
Biswanath Chariali
6
Dimapur
7
8
9
10
11
12
13
Haflong
Imphal
Jiribam
Khliehriat
Kumarghat
Mariani
Melriat
220 kV Bus Bar
132 kV Bus Bar
132 kV Bus Bar
132 kV Bus Bar
132 kV Bus Bar
132 kV Bus Bar
132 kV Bus Bar
220 kV Bus Bar
132 kV Bus Bar
Bus Bar Protection
exists (Yes/No)
LBB Protection exists
(Yes/No)
Yes
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes (EM)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Bus Bar & Local Breaker Backup(LBB) Protection Details
Sl.No. Name of Substation
Voltage level
1. Owner of Bus Bar: MSPCL,
400Manipur
kV Bus Bar
14
Misa
220 kV Bus Bar
220 kV Bus Bar
15
Mokokchung
132 kV Bus Bar
16
Namsai
132 kV Bus Bar
17
Nirjuli
132 kV Bus Bar
18
Roing
132 kV Bus Bar
19
Salakati
220 kV Bus Bar
400 kV Bus Bar
20
Silchar
132 kV Bus Bar
21
Tezu
132 kV Bus Bar
22
Ziro
132kV Bus Bar
Bus Bar Protection
exists (Yes/No)
LBB Protection exists
(Yes/No)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Annexure -A.9 (II)
Bus Coupler Protection Details
Sl.No. Name of Substation
Voltage level
1. Owner of Bus Coupler: MSPCL, Manipur
132 kV Bus Coupler
1
Churachandpur
33 kV Bus Coupler
132 kV Bus Coupler
2
Jiribam
33 kV Bus Coupler
132 kV Bus Coupler
3
Kakching
33 kV Bus Coupler
132 kV Bus Coupler
4
Karong
33 kV Bus Coupler
132 kV Bus Coupler
5
Ningthoukong
33 kV Bus Coupler
132 kV Bus Coupler
6
Rengpang
33 kV Bus Coupler
132 kV Bus Coupler
7
Yaingangpokpi
33 kV Bus Coupler
132 kV Bus Coupler
8
Yurembam.
33 kV Bus Coupler
132 kV Bus Coupler
9
Kongba
33 kV Bus Coupler
2. Owner of Bus Coupler: MePTCL, Meghalaya
1
Mawlai
132 kV Bus Coupler
Non directional
O/C Protection
exists (Yes/No)
Non directional E/F
Protection exists
(Yes/No)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
2
NEHU
132 kV Bus Coupler
Yes
Yes
3
NEIGRIHMS
132 kV Bus Coupler
No
No
4
Khliehriat
132 kV Bus Coupler
No
No
5
Lumshnong
132 kV Bus Coupler
No
No
6
Umiam
132 kV Bus Coupler
No
No
7
Mawphlang
132 kV Bus Coupler
Yes
Yes
8
Cherra
132 kV Bus Coupler
No
No
9
Nongstoin
132 kV Bus Coupler
No
No
10
Nangal
132 kV Bus Coupler
No
No
11
Rongkhon
132 kV Bus Coupler
No
No
12
EPIP-I
132 kV Bus Coupler
No
No
13
EPIP-II
132 kV Bus Coupler
No
No
14
Stage-I PH
132 kV Bus Coupler
Yes
Yes
15
Stage-II PH
132 kV Bus Coupler
Yes
Yes
16
Stage-III PH
132 kV Bus Coupler
Yes
Yes
17
Stage-IV PH
132 kV Bus Coupler
Yes
Yes
18
Umtru PH
132 kV Bus Coupler
No
No
Bus Coupler Protection Details
Non directional
O/C Protection
exists (Yes/No)
Non directional E/F
Protection exists
(Yes/No)
1. Owner
of BusPH
Coupler: MSPCL,
19 Leshka
132 kVManipur
Bus Coupler
Yes
Yes
132 kV Bus Coupler
Yes
Yes
220 kV Bus Coupler
Yes
Yes
3. Owner of Bus Coupler: P&E, Mizoram
132 kV Bus Coupler
1
Kolasib
66 kV Bus Coupler
33 kV Bus Coupler
132 kV Bus Coupler
2
Luangmual
33 kV Bus Coupler
132 kV Bus Coupler
3
Lunglei
33 kV Bus Coupler
132 kV Bus Coupler
4
Serchip
33 kV Bus Coupler
132 kV Bus Coupler
5
Saitul
33 kV Bus Coupler
132 kV Bus Coupler
6
Zemabawk
33 kV Bus Coupler
132 kV Bus Coupler
7
Bairabi
33 kV Bus Coupler
132 kV Bus Coupler
8
Khawzawl
33 kV Bus Coupler
4. Owner of Bus Coupler: NEEPCO
Yes
No
No
No
No
Yes
No
Yes
No
No
No
No
No
No
No
No
No
Yes
No
No
No
No
Yes
No
Yes
No
No
No
No
No
No
No
No
No
Buscoupler Backup
Protection
(50/51A,B,C)
Directional O/C
Protection
Yes
Yes
Buscoupler Backup
Protection
(50/51N)
Directional E/F
Protection
Yes
Yes
Yes
Yes
Sl.No. Name of Substation
20
Killing
Voltage level
400 kV Bus Coupler
1
Ranganadi
132 kV Bus Coupler
2
3
AGBPP
AGTPP
220 kV Bus Bar
132 kV Bus Bar
5. Owner of Bus Coupler: NHPC
1
Loktak
132 kV Bus Coupler