Monitoring Devices SENTRON Answers for infrastructure and cities. Configu-
© Siemens AG 2014
Monitoring Devices
SENTRON
Configuration
Manual
Edition
2014
Answers for infrastructure and cities.
© Siemens AG 2014
© Siemens AG 2014
Monitoring Devices
2
Introduction
5
Transfer control devices
3KC ATC5300 transfer control
devices
40
Monitoring devices for
electrical values
5SV8 residual current monitors
5TT3 voltage relays
5TT3 voltage and frequency relays
5TT6 current relays
5TT3 reverse power relays
5TT3 fuse monitors
5TT3 phase and phase sequence
monitors
5TT3 insulation monitors for industrial
applications
7LQ3 monitors for medical premises
59
61
63
65
66
68
Monitoring devices for plants and
equipment
5TT3 fault signaling units
5TT5 EMERGENCY STOP modules
5TT3 level relays
5TT3 line circuit relays
5TT3 p.f. monitors
5TT3 motor protection relays
11
17
25
28
33
34
35
37
For further technical
product information:
Service & Support Portal:
www.siemens.com/lowvoltage/productsupport
Product List:
Technical specifications
Entry List:
Certificates / Characteristics /
Download / FAQ / Manuals /
Updates
Siemens · 2014
© Siemens AG 2014
Monitoring Devices
Introduction
■ Overview
Page
Application
Standards
Used in
5
The 3KC ATC5300 transfer control
IEC 60947-6-1;
device, equipped with two motor-driven DIN VDE 0660-114
circuit breakers, serves as a transfer
UL 508; C22.2 No. 14
system that automatically or manually
switches between two power supply
systems in low-voltage power distribution applications.
✓
✓
✓
5SV8 residual current monitors
11
To increase system availability and
IEC 62020; EN 62020
operating safety through continuous
monitoring of residual current in electrical systems and signaling if a defined
threshold is exceeded.
✓
--
✓
5TT3 voltage relays
17
Monitoring the voltage of emergency
IEC 60255; EN 62020
lighting in public buildings, short-time
failures of 20 ms, for ensuring operational parameters for devices or system
components or monitoring the neutral
conductor for breaks.
✓
--
✓
5TT3 voltage and frequency relays
17
The voltage and frequency relay moni- IEC/EN 60255-1;
tors the status of the grid in the case of IEC/EN 61000;
in-plant generation systems. Violation of VDE-AR-N-4105
an upper or lower limit results in shutdown and disconnection of the generation system from the grid. This ensures
a stable incoming supply system.
✓
✓
✓
5TT6 current relays
28
Monitoring of emergency and signal
lighting and motors.
✓
--
✓
✓
✓
✓
Non-residential
buildings
Residential
buildings
Industry
Devices
Transfer control devices
3KC ATC5300
transfer control devices
Monitoring devices for electrical values
IEC 60255
All current relays can be short-time
overloaded and connected either with
direct measurement or through
transformers.
5TT3 reverse power relays
2
Siemens · 2014
12/33
Reverse power relays are used in power IEC 50255;
supply systems, e.g. photovoltaic, wind DIN VDE 0435-303
power, water power and unit-type
cogenerating stations, to control the
reverse power. They prevent voltage
being returned from the grid and
causing damage if the infeed system
itself fails or is damaged.
© Siemens AG 2014
Monitoring Devices
Introduction
Page
Application
Standards
Used in
34
Monitoring of all types of low-voltage
fuses.
IEC 60255
✓
--
✓
For the visual signaling of phase failures IEC 60255
or phase sequences in three-phase
systems.
--
--
✓
Non-residential
buildings
Residential
buildings
Industry
Devices
5TT3 fuse monitors
Can be used in asymmetric systems
afflicted with harmonics and regenerative feedback motors.
5TT3 phase and phase sequence
monitors
35
The phase sequence is arbitrary. The
device is also suitable for 1, 2 or
3-phase operation.
5TT3 insulation monitors
for industrial applications
37
To increase system availability and
IEC 60255;
operating safety through continuous
IEC 61557
monitoring of the isolation resistance in
non-grounded direct voltage or
AC voltage systems.
--
--
✓
7LQ3 monitors for
medical premises
40
For the insulation monitoring of a
medical IT system or the load current
monitoring of an IT system transformer
for a non-permissible temperature rise.
EN 61557-8;
IEC 61557-8;
DIN VDE 0100-710;
IEC 60364-7-710
✓
--
--
IEC 60255
✓
--
✓
✓
--
✓
Monitoring of the voltage supply with
automatic switchover.
Monitoring devices for plants and equipment
5TT3 fault signaling units
59
Evaluation and display of fault alarms
and alarm signals for monitoring
industrial plants and control systems.
With 4 inputs and connections for
39 expansion fault signaling units.
5TT5 EMERGENCY STOP modules
61
For EMERGENCY-OFF switching in
According to the
accordance with the Directive 98/37/EC Machinery Directive
on Safety of Machines. Safe types of
98/37/EC; EN 954-1
circuits for machines, plants or test stations in industrial, commercial and private enterprise applications.
Siemens · 2014
3
© Siemens AG 2014
Monitoring Devices
Introduction
Page
Application
Standards
Used in
5TT3 level relays
63
Control of liquid levels in containers with IEC 60255,
3 electrode connections for 1-step and DIN VDE 0435
2-step level control. High immunity to
interference of the measuring circuit
isolated from the system.
✓
--
✓
5TT3 line circuit relays
65
For disconnecting the voltage of
unused lines when loads are disabled.
IEC 60255,
DIN VDE 0435
--
✓
--
5TT3 p.f. monitors
66
For the monitoring of asynchronous
motors for underload and no-load
operation, e.g. fan monitoring in the
case of V-belt breakage, filter
blockages, pump monitoring in the
event of valve closure or dry runs.
IEC 60255,
IEC 61557
--
--
✓
5TT3 motor protection relays
68
For the prevention of thermal motor
IEC 60255,
overloads, e.g. due to high switching
DIN VDE 0435
frequency, single-phasing, disabled
cooling or excessive ambient temperatures.
With detection of wire breaks in the
sensor circuit.
--
--
✓
Non-residential
buildings
Residential
buildings
Industry
Devices
4
Siemens · 2014
© Siemens AG 2014
Monitoring Devices
Transfer Switches
3KC ATC5300 transfer control devices
■ Overview
Mode of operation
The 3KC ATC5300 transfer control device controls the transfer
between the main and standby power supplies fully automatically, while incorporating set limit values and delay times. It detects fluctuations occurring in the main power supply quickly
and switches to the standby power supply. The control device
only switches to the standby power supply after it has ensured
that the standby supply is delivering the required power supply
quality. The devices switches back to the main power supply taking into consideration the set parameters once the required
power supply quality is available again. If the standby power
supply and/or the main power supply is fed by a generator, the
control device also offers a wide range of settings, such as a
generator lead time, generator delay time, and generator start
test at specified times.
The 3KC ATC5300 transfer control device can control air circuit
breakers, molded case circuit breakers, switch disconnectors
and contactors. The circuit breakers are controlled via the related motorized operating mechanisms.
Parameterizing and monitoring using
3KC ATC5300 software
3KC ATC5300 transfer control devices
Automatic transfer control via the 3KC ATC5300 transfer
control device
The 3KC ATC5300 transfer control device, equipped with two
motor-driven circuit breakers, serves as a transfer system that
automatically or manually switches between two power supply
systems in low-voltage power distribution applications.
In particular, the 3KC ATC5300 transfer control device is deployed everywhere where a power failure is especially critical,
e.g. distributed power supply systems with UPS supply (e.g. airconditioning of control cabinets), in industrial processes and the
emergency power supply of public buildings, such as hotels.
Measured quantity
Rated system voltage Un
V AC
In addition to operation and parameterization on-site, you can
also monitor and set the parameters of the controller using the
SENTRON ATC software. The software offers a high level of convenience and quick access to all device settings, e.g. complex
settings which occur when connecting generators.
Measured quantities
The 3KC ATC5300 records and monitors the following measured
quantities:
Basic setting
Limit value setting
Delay time
Can be
deactivated
100 ... 690
70 % ... 98 % (75 % ... 100 %) 1)
0.1 s ... 900 s
--
102 % ... 120 % (100 % ... 115 %) 1) 0.1 s ... 900 s
✓
Voltage asymmetry
%
1 % ... 20 %
0.1 s ... 900 s
✓
Phase failure
%
60 % ... 85 %
0.1 s ... 30 s
✓
Left, right
--
--
✓
50/60
80 % ... 100 %
0.1 s ... 900 s
✓
101 % ... 120 %
0.1 s ... 900 s
✓
70 % ... 100 %2)
0 ... 60 s
✓
Phase sequence
Frequency
Battery voltage Ub
Hz
V DC
12/24/48
110 % ... 140 %2)
1)
Hysteresis value for enabling back-transfer
2)
Warning only, no switching
✓
✔ yes
-- no
Siemens · 2014
5
© Siemens AG 2014
Monitoring Devices
Transfer Switches
3KC ATC5300 transfer control devices
■ Application
Applications
LV main distribution board
G
x
or
{
x x x x
x
x
Applications in low-voltage power supplies
The 3KC ATC5300 is ideally suited for low-voltage power supplies thanks to its wide voltage range covering up to 690 V UL-L.
Sub-distribution board
Two separate power supplies are required to maintain a continuous power supply to loads in the event of a power failure. Loads
can be supplied with power through the following configurations
system to system, system to generator, or generator to generator. The 3KC ATC5300 can be deployed throughout the entire
range of low-voltage power distribution applications.
G
Beispiel 2
Normalnetz
x
Ersatznetz
Un
Un
Q2
Q1
ATC5300
G
Q2
0
0
1
0
0
1
0
1
0
{
Ur
Q1 Q2
ATC5300
0
1
0
Beispiel 4
Normalnetz
Beispiel 3
Normalnetz
Ersatznetz
Ersatznetz
G
Un
G
Un
Ur
Q1
Q2
Ur
ATC5300
Q1 Q2
Q1 Q2
0
0
1
0
0
1
0
1
0
0: ausgeschaltet (Kontakt offen)
1: eingeschaltet (Kontakt geschlossen)
Examples of switching options with truth table
Siemens · 2014
G
Q2
ATC5300
6
x x x
or
G
Q1 Q2
Q1
x
Switchboard
Ersatznetz
Ur
Q1
or
{
{
or
It can be integrated as a control panel instrument in low-voltage
main distribution units, sub-distribution units, and distribution
boards.
Beispiel 1
Normalnetz
G
0
1
0
NSG0_00249a
x x x x x
Applications in low-voltage power distribution
x
x
I202_01379
The 3KC ATC5300 transfer control device can be used for the
following applications:
• Supplying power to UPS systems
• Hospital power supplies
• Public building, hotel and airport emergency power supplies
• Data center and communication system power supplies
• Supplying power to industrial processes that require a high
level of operational continuity
© Siemens AG 2014
Monitoring Devices
Transfer Switches
3KC ATC5300 transfer control devices
Supplying power to UPS systems
The 3KC ATC5300 ensures a high level of reliability and operational continuity. It can be used in all areas such as industry,
infrastructure and buildings. Emergency power supplies are
needed in public buildings, high-rise buildings, hospitals and
other areas where people work.
G Diesel generator
x
UPS systems are essential for areas with high demands regarding supply safety, such as in hospitals and IT systems. Using the
3KC ATC5300 in conjunction with USP systems ensures the
maximum level of continuous power distribution. In case of a
power failure, the end loads are immediately supplied by the
UPS system until the control device has successfully switched to
the standby system.
x
x
x
I202_01382
x
Automatic
bypass
Industries
The 3KC ATC5300 is used independently where a high level of
supply safety is required.
x
UPS system
x
x
Feeding UPS systems with the 3KC ATC5300 transfer control device
■ Design
Front and rear of the 3KC ATC5300
A) Switchover between measured data
(voltage, frequency),
when in the parameter setting
programming mode
B) Manual switchover
A
C
A
C) In Test mode, the generator start-up
can be tested, without
switching over to the standby power supply.
D
B
D) Automatic switchover to the
standby power supply in case of fault
B
E
E) Manual switchover possible
F) Switch off, access for programming
F
I202_01381
Front
C
A
A) Ausgang zum Ansteuern von:
Motorantrieben, Schütze 250 VAC 12 A
B) Programmierbare Ein- und Ausgänge z.B. für
elektrische Verriegelung, Generator-Startsignal,
Alarmausgabe usw.
A
D
C) Spannungsversorgung: 220-240 VAC
oder 12-24-48 VDC
D) Messleitung, Hauptnetz
G
E
E) Messleitung, Ersatznetz
F) Kommunikation RS485 (Modbus RTU)
G) Kommunikation RS232
(Verbindung zum PC mit SENTRON
Software ATC)
F
Rear
B
I202_01384
Siemens · 2014
7
© Siemens AG 2014
Monitoring Devices
Transfer Switches
3KC ATC5300 transfer control devices
■ Function
The control device is equipped with four selectable modes:
• Automatic
• Manual
• Test
• Off
In Manual mode, the system can be switched manually on the
3KC ATC5300 transfer control device. The test mode allows the
generator to be started or tested in the system-generator configuration, without switching to the standby power supply. This ensures that the power flow to the load is not interrupted.
The control device is also equipped with programmable inputs
and outputs. They enable the implementation of the following
functions, among other things:
• Load shedding (unauthorized loads are disconnected from
the system)
• Load shedding preparation (machines can be switched into
safe mode)
• Generator start and stop signal
• Collective fault message (e.g. message to PLC, light)
• An external signal initiates the transfer to the standby system
• An external signal can communicate to the control device that
switching is not permitted, even if the limit value is not maintained
The 3KC ATC5300 transfer control device can be connected to
a higher-level power management system using the Modbus interface (RTU or ASCII). Modbus enables the transfer of all data,
parameter sets, and status messages of the device.
3KC ATC5300 transfer control device in a Modbus RTU network
The 3KC ATC5300 transfer control device supports the
MODBUS communication protocol (RTU or ASCII) via the
RS485 interface.
I202_01383
Modbus master,
e.g. PC
wyvmpi|zGkw
Modbus/ Profibus converter
Modbus RTU system
ATC5300
COM 21
COM 16
COM 21
3VL
with ETU
10 / 12
20 / 22
3VL
with ETU
10M / 20M
3VL
Easy system integration through integrated MODBUS interface, e.g. for integrating into a power management system
(ETU: Electronic Trip Unit)
8
Siemens · 2014
3WL
© Siemens AG 2014
Monitoring Devices
Transfer Switches
3KC ATC5300 transfer control devices
■ Programming
Parameterizing and monitoring using
3KC ATC5300 SOFTWARE
In addition to operation and setting parameters on-site, you can
also monitor and set the parameters of the control device using
the 3KC ATC5300 SOFTWARE. The software offers a high level
of convenience and quick access to all device settings.
Various time settings required when connecting generators can
be easily programmed using the software. If parameters for
several devices must be set, the data sets can be very easily
duplicated.
The 3KC ATC5300 transfer control device features internal
memory that logs the occurring events. The software can read
out this data and compile it into statistics.
Setup
Main screen
Statistical analysis
Event display
Siemens · 2014
9
© Siemens AG 2014
Monitoring Devices
Transfer Switches
3KC ATC5300 transfer control devices
■ Technical specifications
ATC5300
ATC5300
Auxiliary supply
Reversing time of control device s
Rated voltage Un
• AC
• DC
Communication cables
V AC 220 ... 240
V DC 12/24/48
Operating range
• AC
• DC
V AC 187 ... 264
V DC 9 ... 70
Frequency
Hz
45 ... 65
Max. power consumption
at Un = 240 V AC
VA
9
W
W
6.3
4.1
Max. power loss
• At 240 V AC
• At 48 V DC
Max. power consumption
• At 12 V DC
• At 24 V DC
• At 48 V DC
Safety in the event of short
interruptions
1
RS 232 serial interface
bit/s
• Programmable transmission rate
• Connection through
RJ6/6 connector
1200 ... 38400
RS485 serial interface
bit/s
• Optically insulated
• With programmable transmission
rate
• Connection through
plug-in terminals
1200 … 38400
Real-time clock
Energy storage
mA
mA
mA
300
180
90
Operating time without feeding
voltage
ms
50
Rated insulation voltage Ui
Stored-energy capacitors
Days Approx. 12 ... 15
Insulation voltage
V
690
Ambient conditions
Measuring inputs
Operating temperature
°C
-20 … +60
Max. rated voltage Un
• Phase-phase
• Phase-neutral
V AC 690
V AC 400
Storage temperature
°C
-30 … +80
Relative humidity
%
< 90
Phase-phase measuring range
V AC 80 ... 800
Max. pollution degree
3
Frequency ranges
Hz
45 ... 65
Overvoltage category
3
RMS value (true RMS)
Measuring category
CAT III
Measuring method
Measuring input impedance
• Phase-phase
• Phase-neutral
Connections
M
M
Connection method
> 1.1
> 0.5
Terminal type
Single-phase, two-phase, or
three-phase system
Cable cross-section
mm2
0.2 ... 2.5 (24 ... 12 AWG)
Max. tightening torque
Nm
0.5 (4.5 lbf·in)
Enclosure
0.25 %,
value range 1 digit
Measuring errors
Digital inputs
Enclosure material
Thermoplastic LEXAN 3412R
Version
Door installation
Number of inputs
8, 6 of which are programmable
Degree of protection
Type of input
Negative
Weight
Certificates and conformity
Input current
mA
10
Input signal
• Logic state "0"
• Logic state "1"
V
V
1.5 (typical 2.9)
5.3 (typical 4.3)
Input signal delay
ms
50
Relay outputs
Number of outputs
7, 5 of which are programmable
Contact configuration
• 2 relays with 1 NO contact
• 3 relays with 1 NO contact
• 2 relays with 1 CO contact
12 A, at 250 V AC (AC1)
8 A, at 250 V AC (AC1)
8 A, at 250 V AC (AC1)
■ Dimensional drawings
102.3
94.6
144
79
,B
3KC ATC5300 transfer control device: front view and view from the right
10
Siemens · 2014
IP41 front, IP20 rear
g
950
ATS/ATSE standard
Complies with the ATS/ATSE
standard IEC 60947-6-1,
in combination with
3VL or 3WL1)
UL 508; C22.2 No. 14
Environment classification
3K6 acc. to IEC 60721-3-3
3B2 acc. to IEC 60721-3-3
3C3 acc. to IEC 60721-3-3
3S2 acc. to IEC 60721-3-3
3M6 acc. to IEC 60721-3-3
EMC
Acc. to IEC 60947-6-1
1)
144
Removable/pluggable
For more information see manual at:
www.siemens.com/lowvoltage/manual.
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5SV8 residual current monitors
■ Overview
100 % n
Disconnection
Residual current
n
Plant safety and operating safety are becoming increasingly important alongside the protection of personnel. Shutdowns due to
the unexpected tripping of protective devices cause high costs.
It is possible to detect residual currents in the electrical installation before the protective device responds.
Residual current monitors (RCM) monitor residual current in
electrical installations and issue a signal when the residual current exceeds a set value.
50 %
Alarm
The summation current transformer detects all conductors required to conduct the current, i.e. including the neutral conductor where applicable. In a fault-free system, the magnetizing effects of the conductors through which current is flowing cancel
each other out for the summation current transformer, i.e. the
sum of all currents is zero. If a residual current is flowing due to
an insulation fault, a residual magnetic field is left in the core of
the transformer and produces a voltage. This voltage is evaluated using the electronics of the RCM. The switched contact can
be used e.g. to operate an acoustic/optical signaling device,
a higher-level control system or a circuit breaker.
I202_16044
RCMs are used primarily in plants where a fault should result
in a signal but not in disconnection. This enables plant operators
to detect faults and eliminate their causes before the protective
devices disconnect the installation, which increases plant and
operating safety and cuts costs.
n
Time t
Time characteristic of the rated residual current n
■ Benefits
• Higher plant availability and operating safety through permanent monitoring of residual currents
• Adjustable limit values for residual current and response time
enable timely detection and signaling – plant shutdowns are
often avoidable
• Devices for every application:
The summation current transformers are available in various
sizes, the RCMs can be used optionally for signaling and/or
switching
• Additional fire protection can be implemented using the
monitoring system
■ Technical specifications
RCM analog
RCM digital
RCM digital, 4 channels
EN 62020, IEC 62020
Standards
Approvals
UL
Rated operational voltage Ue
• Frequency
V AC
Hz
230
50/60
Rated residual current n
• Type A
• Type AC
A
A
0.03 ... 3
>3
0.03 ... 3
5 ... 30
0.03 ... 3
5 ... 30
Response time t
s
0.02 ... 5
0.02 ... 10, INS, SEL1)
0.02 ... 10, INS, SEL1)
1 × alarm
1 × alarm,
1 × tripping operation
230
6
1 × alarm,
4 × tripping operation
230
6
--/Yes
Yes/Yes
Yes/Yes
2
3
3
Relay contacts
• Rated voltage
• Rated current
V AC
A
230
6
Summation current transformer
mm
20 ... 210
Maximum cable length RCM/CT (shielded cable)
m
10
Conductor cross-section
mm2
1.5
Yes/Yes
Test/Reset
External tripping operation/external reset
Mounting width
MW
Degree of protection
• Contacts
• Front
Operating temperature
1)
IP20
IP41
°C
-10 ... +50
INS: instantaneous, SEL: selective.
Siemens · 2014
11
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5SV8 residual current monitors
■ Dimensional drawings
I202_116027
45
67
85
45
67
85
I202_16028
Residual current monitor
44
36
6
44
54
68
6
RCM analog, 5SV8000-6KK
68
RCM digital, 5SV8001-6KK, 5SV8200-6KK
Summation current transformer
32
Ø59
Summation current transformer, 5SV8700-0KK
Summation current transformer, 5SV8701-0KK
A
33
Type
F
I202_16031
G
B
ØE
C
6,5
46
D
8
Summation current transformer, 5SV8702-0KK, 5SV8703-0KK, 5SV8704-0KK,
5SV8705-0KK, 5SV8706-0KK
12
Siemens · 2014
70
Ø30
24
Ø20
Ø46
I202_16030
60
I202_16029
30
32
Dimensions
A
B
C
D
E
F
G
5SV8702-0KK
100
79
26
49
35
35
43
5SV8703-0KK
130
110
32
66
70
52
57
5SV8704-0KK
170
146
38
94
105
72
73
5SV8705-0KK
230
196
49
123
140
97
98
5SV8706-0KK
299
284
69
161
210
141
142
Type
Rated current
Maximum current
5SV8700-0KK
40 A
240 A
5SV8701-0KK
63 A
380 A
5SV8702-0KK
80 A
480 A
5SV8703-0KK
200 A
1200 A
5SV8704-0KK
250 A
1500 A
5SV8705-0KK
500 A
3000 A
5SV8706-0KK
600 A
3600 A
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5SV8 residual current monitors
■ Circuit diagrams
Residual current monitor
5
6
L
N S1 S2
7 8
L1 L2 L3 N
ST
NO C NC
1
2
5
6
L
N S1 S2
1
2
ST
3 4
5
L
7 8
5
6
N S1 S2
L
N S1 S2
6
L1 L2 L3 N
UR
NO C NC
1
RCM analog, 5SV8000-6KK, shunt trip (ST), self-acknowledging
2
1
UR
2
3 4
I202_16033a
1S2
1S1 1S2 2S1 2S2
1S1
1S1 1S2 2S1 2S2
1S2
L1 L2 L3 N
NO C NC
3 4
1S1
7 8
I202_16035a
RCM analog, 5SV8000-6KK, shunt trip (ST)
I202_16034a
I202_16032a
1S2
1S1 1S2 2S12S2
1S1
1S1 1S2 2S1 2S2
1S2
L1 L2 L3 N
NO C NC
3 4
1S1
7 8
RCM analog, 5SV8000-6KK, undervoltage release (UR)
RCM analog, 5SV8000-6KK, undervoltage release (UR),
self-acknowledging
ST = shunt trip
UR = undervoltage release
Siemens · 2014
13
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5SV8 residual current monitors
L1 L2 L3 N
L1 L2 L3 N
T
T
ST
ST
1S2
Reset
C2
Reset
Test
Test
C1
C1
I202_16041a
1 2 3 4 5 6 7 89
S/R
1S1
1S2
1 2 3 4 5 6 7 89
I202_16042a
S/R
10 11 12 13 14 15
1S1 1S2 2S1 2S2
C2
1S1
1S1 1S2 2S1 2S2
10 11 12 13 14 15
RCM digital, 5SV8001-6KK, shunt trip (ST)
RCM digital, 5SV8001-6KK, shunt trip (ST), self-acknowledging
L1 L2 L3 N
T
UR
C2
Reset
1S1
1S2
1S1 1S2 2S1 2S2
10 11 12 13 14 15
Test
C1
1 2 3 4 5 6 7 89
I202_16043a
S/R
RCM digital, 5SV8001-6KK, undervoltage release (UR)
ST = shunt trip
UR = undervoltage release
S/R = set/reset
14
Siemens · 2014
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5SV8 residual current monitors
LN
L N
L1L2 L3N
S/R
230 V AC
L1L2 L3N
1S1 1S2
T1
1S1 1S2
10 11 12 13 14 15
T2
Reset
10 11 12 13 14 15
L N
Test
C2
Reset
I202_16040a
C1
L1L2 L3N
1 2 3 4 5 6 7 89
C
Test
C3 C4
1S1 1S2
T4
T3
T2
1S1
1S2
1S1
1S2
1S1
1S2
T4
1S2
L1L2 L3N
1S1
1S1 1S2
1 2 3 4 5 6 7 89
T1
I202_16036a
T3
RCM digital, 4 channels, 5SV8200-6KK, shunt trip (ST)
RCM digital, 4 channels, 5SV8200-6KK
ST = shunt trip
S/R = set/reset
■ More information
Switch positions
RCM digital, 5SV8001-6KK:
Setting
Alarm
Trip
Alarm
"Standard"
"Standard"
"+"
Without power supply
4
5
6
4
5
6
4
4
With power supply
Over limit
CT disconnection
Trip
"+"
15
14
13
4
5
6
15
14
13
15
14
13
4
5
6
5
6
4
5
6
15
14
13
5
6
4
5
6
15
14
13
Siemens · 2014
15
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5SV8 residual current monitors
RCM digital, 4 channels, 5SV8200-6KK:
Alarm
Trip
Setting
"Standard"
"Standard"
Without power supply
10
1
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
With power supply
10
1
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
Over limit
10
1
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
CT disconnection
10
1
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
C1: 14
C2: 14
C3: 8
C4: 8
C1: 13
C2: 15
C3: 7
C4: 9
16
Siemens · 2014
Trip
"+"
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
■ Overview
They are available as undervoltage, overvoltage and under/
overvoltage relays. The devices are equipped with different
functions, depending on their intended use, and comply with the
pertinent regulations.
Voltage relays are used for device and plant protection, supplying safety light devices and the detection of N-conductor breaks
and short-time voltage interruptions.
■ Technical specifications
5TT3400
5TT3401
5TT3402
5TT3403
Rated control voltage Uc
V AC
230/400
Operating range (overload capability)
×Uc
1.1
400
Hz
50/60
0.9/0.95
0.7/0.85
V; mA
10; 100
Setting accuracy
%
--
Approx. 5 ... 10
--
Repeat accuracy
%
--
1
--
At L1 or L2 or L3
ms
100
--
N-conductor monitoring
4 % hysteresis
0.7 ... 0.95
0.9 ... 1.3
Between coil/contact
kV
4
Contacts
contact (AC-11)
A
4
Electrical isolation
Creepage distances and
clearances
Actuator/contact
mm
3
5.5
Rated impulse withstand voltage Uimp
Actuator/contact
kV
> 2.5
>4
Terminals
screw (Pozidriv)
Conductor cross-sections
• Rigid, max.
• Flexible, with end sleeve, min.
Permissible ambient temperature
Approx.
5 ... 10
1
-Yes
Rated insulation voltage Ui
Resistance to climate
5TT3195
1.35
×Uc
Minimum contact load
Phase failure detection
5TT3194
ON-switching
OFF-switching
Rated frequency
Phase asymmetry
5TT3406
IEC 60255; IEC 61810
Standards
Response values
5TT3404
5TT3405
--
1
mm2
mm2
2 × 2.5
0.5
°C
-20 ... +60
20/60/4
Acc. to EN 60068-1
5TT3196
IEC 60255
Standards
Rated control voltage Uc
V DC
24
Rated power dissipation Pv
• Coil/drive
• Contact1) per pole
VA
VA
0.6
0.8
Hysteresis
%
4
Response values × Uc
• Undervoltage
• Overvoltage
Undervoltage
Overvoltage
Residual ripple tripping Uc
Infinitely variable
%
0 ... 15
Overload capability
33 V DC
35 V DC
45 V DC
ms
ms
Continuous
500
10
mm
4
Input/output
kV
> 2.5
V/mA
24/300
AC-11
AC-1
A
A
1
4
Creepage distances and clearances
Rated impulse withstand voltage Uimp
Minimum contact load
Rated operational current Ie
0.82
1.18
contact
Contacts
Electrical service life
In switching cycles at Ie
5 × 105
Terminals
+/- screw (Pozidriv)
1
Conductor cross-sections
• Rigid, max.
• Flexible, with end sleeve, min.
Permissible ambient temperature
Resistance to climate
1)
Acc. to EN 60068-1
mm2
mm2
2 × 2.5
1 × 0.5
°C
-20 ... +60
20/60/4
For rated operational current.
Siemens · 2014
17
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
5TT3407
5TT3408
5TT3410
1.35
1.2
IEC 60255; IEC 61810
Standards
Rated control voltage Uc
V AC
230/400
Operating range (overload capability)
×Uc
1.1
Rated frequency
Hz
50/60
Back-up fuse
Terminals L1/L2/L3
A
2
Response values
Overvoltage:
OFF-switching
ON-switching
×Uc
---
0.9 ... 1.3
4 % hysteresis
---
Undervoltage:
OFF-switching
ON-switching
× Uc
0.8
0.85
0.7 ... 1.1
4 % hysteresis
---
V; mA
10; 100
Setting accuracy
%
Approx. 5 ... 10
Repeat accuracy
%
1
At L1, L2 or L3
ms
20
100
--
OFF delay
s
--
0.1 ... 20
--
Automatic reclosing delay
s
0.2 ... 20
--
--
Between coil/contact
kV
4
Contacts
contact (AC-11)
A
3
1
4
Electrical isolation
Creepage distances and
clearances
Contact/contact
Actuator/contact
mm
mm
-4
4
-5.5
Rated impulse withstand voltage Uimp
Actuator/contact
kV
>4
Rated operational power Ps
AC operation:
230 V and p.f. = 1
230 V and p.f. = 0.4
VA
VA
2000
1250
---
---
DC operation:
Ue = 24 V and Ie = 6 A
Ue = 60 V and Ie = 1 A
Ue = 110 V and Ie = 0.6 A
Ue = 220 V and Ie = 0.5 A
W
W
W
W
max. 100
max. 100
max. 100
max. 100
-----
-----
Minimum contact load
Phase asymmetry
Phase failure detection
Rated insulation voltage Ui
screw (Pozidriv)
Terminals
Conductor cross-sections
• Rigid, max.
• Flexible, with end sleeve, min.
Permissible ambient temperature
Humidity class
1
mm2
mm2
2 × 2.5
0.5
°C
-20 ... +60
F
Acc. to IEC 60068-2-30
5TT3411
5TT3412
Rated control voltage Uc
V AC
230
230/400
Overload capability
× Uc
1.15
1.1
1.15
Rated frequency
Hz
50/60
Response values
Minimum contact load
Phase failure detection
2 % hysteresis
4 % hysteresis
5%
× Uc
0.9
0.9
0.85
V/mA
10/100
ms
--
100
500
--
Yes
--
ON-switching
OFF-switching
At L1, L2 or L3
5TT3414
N-conductor monitoring
Rated insulation voltage Ui
Between coil/contact
kV
Contacts
AC-15 NO contacts
3
2
--
AC-15 NC contacts
2
1
--
AC-15 CO contacts
--
1
1
Electrical service life in switching cycles
AC-15, 1 A, 230 V AC
5 × 105
1 × 105
Rated impulse withstand voltage
Acc. to IEC 60664-1
4
6
2
2
2
--
-3.5
mm2
mm2
2 × 2.5
2 × 1.5
1x4
1 x 2.5
°C
-20 … +60
-25 … +60
kV
Pollution degree
± screw (Pozidriv)
– screw (slot)
Terminals
4
--
Conductor cross-sections
• Rigid
• Flexible, with end sleeve
Permissible ambient temperature
Resistance to climate
18
Siemens · 2014
Acc. to EN 60068-1
20/060/04
5TT3415
2
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
■ Characteristic curves
Timing interval of
5TT3410
N-conductor monitors
Timing interval of
5TT3400... 5TT3406
undervoltage relays
L1, L2, L3
Uc
I201_07516b
C
Uab
I201_07033b
L3
L2
L1
11-14
11-12
N
Uab= Release value
11-14
11-12
PEN conductor
interruption
Timing interval of
5TT3408
under/overvoltage relays
Timing interval of
5TT3407
short-time relays
U
Without fault
storage
I201_07271c
I201_07270b
>U
Hysteresis
UH
Uc
0
Hysteresis
<U
11-14
11-12
Good-signal
Good-signal
L1, L2, L3
t
tv
Response time
tv
11-14
11-12
t
With fault
storage
"RESET"
"RESET"
T
0
11-14
11-12
Good-signal
tv
Response time
LED
green
On
LED <U
red
On
LED >U
red
On
t
Off
Off
Good-signa
tv
Off
tv: adjustable automatic reclosing delay 0.2 to 20 s
t: adjustable OFF delay 0.1 to 20 s
The undervoltage relay switches at a phase asymmetry
of approx. 6 to 8 %, regardless of the response values for undervoltage. The
above diagram shows the timing interval for undervoltage or asymmetry.
The undervoltage relay switches at a phase asymmetry of
approx. 6 to 8 %, regardless of the response values for undervoltage.
The above diagram shows the timing interval for undervoltage.
Siemens · 2014
19
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
5TT3415 undervoltage relays
5TT3411 and 5TT3412 voltage relays
Characteristic curves of the 5TT3411 and 5TT3412 voltage
relays see "Insulation monitors for medical premises" on
page 40.
U
Hysteresis
Us
L1, L2, L3
5TT3415
TEST
LED gn
LED ge
11-14
21-24
11-12
21-22 t=1min
I202_01419
t>0,5s
■ Dimensional drawings
5TT34, 5TT3194 and 5TT3195 voltage relays
L1 L2 L3
L1 N
L1 L2 L3 N
L1 L2 L3 N
12
12
12
14 11 24 21
14 11 24 21
14 11 24 21
18
36
36
36
5TT3402
5TT3403
5TT3404
5TT3405
5TT3407
5TT3408
5TT3194
5TT3195
5TT3406
5TT3400
5TT3401
22
22
12
14 11
22
I201_11515
45
90
L1 L2
5
43
64
5TT34 undervoltage relays
/
/
/
/
1
/
1
/
5TT3410 N-conductor monitors
12
45
90
e+ f
2324
18
20
5
43
55
Siemens · 2014
36
5
43
64
5TT3411 and 5TT3412 voltage relays
I201_06552
5TT3196 DC voltage monitors
1112
22
14 11 24 21
I201_11516
,B
45
90
L1 L2 L3 N
Dimensional drawings of the 5TT3411 and 5TT3412 voltage relays
see "Insulation monitors for medical premises".
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
■ Circuit diagrams
N
11
5TT3194
5TT3195
L1 L2 L3 14 12
e(+) 24 12
f
21
5TT3402
5TT3403
5TT3404
5TT3405
5TT3406
5TT3407
5TT3408
5TT3410
N
23 11
5TT3196
L1
L2
L3
11
12 14
11
5TT3400
5TT3401
L1
L2
L3
I202_01420
L1 L2 L3 14 12 24 22
N
N
5TT3414
5TT3415
12 14
22 24
11
21
I202_01421
Graphic symbols
5TT34 undervoltage relays
L1
L2
L1
L2
N
L3
N
L3
L1
L2
L3
N
N
12
11
12
11
14
14
22
21
24
I202_01415
L1
L2
L3
21 22 24
11 12 14
11 12 14
5TT3414
5TT3415
5TT3411 and 5TT3412 voltage relays
Circuit diagrams of the 5TT3411 and 5TT3412 voltage relays see "Insulation monitors for medical premises" on page 40.
Typical circuit for 5TT3195, 5TT340 voltage relays
1, 2, 3-phase operation against N
L1 L2 L3 N
L1
14 12 24 22
11
21
One-phase operation
L1 L2 L3 L4
L2
L1 L2 L3 N
14 12 24 22
11
Two-phase operation
21
I201_07596c
N
I201_07595c
I201_07594c
L1
L1 L2 L3 N
14 12 24 22
11
21
Three-phase operation
Typical circuit for 5TT3196 DC voltage monitors
L2
L1
1,18 x U c
5TT3 196
e+ 12 24
0,82 x U c
Load
f 11 23
24 V DC
I201_07274a
23-24
11-12
I2_07035a
L3
If 0.82 × Uc is fallen short of, or 1.18 × Uc exceeded, or if the residual ripple
is too high, the 11/12 contacts closes and the 23/24 contact opens.
Siemens · 2014
21
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
Typical circuit for 5TT3401, 5TT3403, 5TT3405
undervoltage relays
Emergency
power supply
L1' L2' L3' N'
Standard
power supply
L1 L2 L3 N
Typical circuit for 5TT3404, 5TT3405, 5TT3406, 5TT3408
undervoltage relays
PE
L1 L2 L3 N
Phase failure
3 AC 230 V
I201_07273d
L1 L2 L3 N
L1 L2 L3 L4
K2
14 12 24 22
11
K1
11
K1
21
21
K2
I201_07272d
K1
14 12 24 22
M
Emergency
lighting
Standard
lighting
One application of undervoltage relays is the switching to a safe power supply
after a fault.
Buildings are distinguished according to use, such as business premises, exhibition areas or guest houses. These are all covered generically as rooms/buildings
where "people meet".
There is a fault if the voltage of the general power supply drops for 0.5 seconds
> 15 % in relation to the rated voltage (i.e. 195 V at 230 V).
In this case the lighting must be switched to a safety power supply after 0.5 to
15 s depending on the type of use. A safety power supply may be: a battery
system, a generating set or a quick-starting standby generating set.
22
Siemens · 2014
These voltage relays can only be used for 3-phase operation. They
monitor not only under- and overvoltages in accordance with their
description, but also reverse voltage, asymmetry and N-conductor
breaks.
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
Typical circuit for
5TT3407 short-time relays
L1 L2 L3 N
Typical circuit for
5TT3407 short-time relays
3 AC 230 V
L1 L2 L3 N
230 V 3 AC
Reset
L1 L2 L3 N
14 12 24 22
Reset
K1
K1
L1 L2 L3 N
21
I201_07598d
11
14 12 24 22
11
1
2
3
4
21
5TT3407
7KT5883
I201_07597d
In the case of sensitive technical sequences, it is often not possible to tell
whether this interrupt has interfered with the process sequence. The circuit
disconnects the power supply, which can then be switched back by using
the reset pushbutton.
In simple cases, it may be sufficient for a short-time interruption to be registered without the need to disconnect the power supply. In the case of a
short-time interruption, this is counted by the pulse counter. The pulse counter can be reset if required.
Typical circuit for
5TT3410 N-conductor monitors
L1
F1
L2
F2
L3
N
PE
F3
K1
S1
Test and
service
switch
L1 L2 L3
11
N
14
I201_07517b
F4
F5
F6
5TT3410
K1
Siemens · 2014
23
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage relays
■ More information
5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3
194
195
196
400
401
402
403
404
405
406
407
408
410
411
412
Overvoltage
✓
✓
✓
--
--
--
--
--
--
--
--
✓
--
✓
✓
Undervoltage
--
--
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
--
--
--
Monitoring of safety light devices
--
--
--
--
✓
--
--
--
✓
--
--
--
--
--
--
Monitoring of medical premises
--
--
--
--
--
--
--
--
--
--
--
--
--
✓
✓
Monitoring of N-conductor
--
--
--
--
--
--
--
--
--
--
--
--
✓
--
✓
Monitoring of short-time interruptions
--
--
--
--
--
--
--
--
--
--
✓
--
--
--
--
1, 2, 3-phase to N
✓
--
--
✓
✓
✓
✓
--
--
--
✓
--
--
✓
✓
3 phases to N
--
✓
--
--
--
--
--
✓
✓
✓
--
✓
--
--
--
Asymmetry detection
--
✓
--
--
--
--
--
✓
✓
✓
--
✓
✓
--
✓
N-conductor monitoring
--
--
--
--
--
--
--
✓
✓
✓
✓
✓
✓
--
✓
Reverse voltage detection
--
✓
--
--
--
--
--
✓
✓
✓
--
✓
--
--
✓
Short-time failure detection
--
--
--
--
--
--
--
--
--
--
✓
--
--
--
--
Phase failure detection
--
--
--
✓
✓
✓
✓
✓
✓
✓
✓
✓
--
--
✓
Switching thresholds:
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
0.7/0.9 × Uc, not adjustable
--
--
--
✓
--
✓
--
✓
--
--
--
--
--
--
--
0.8/0, 85 × Uc, not adjustable
--
--
--
--
--
--
--
--
--
--
✓
--
--
--
--
0.85/0.95 × Uc, not adjustable
--
--
--
--
✓
--
✓
--
✓
--
--
--
--
--
--
0.7 ... 0.95 × Uc, 5 % hysteresis, adjustable
--
--
--
--
--
--
--
--
--
✓
--
--
--
--
--
0.7 ... 1.1 × Uc, 4 % hysteresis, adjustable
--
--
--
--
--
--
--
--
--
--
--
✓
--
--
--
0.9 ... 1.3 × Uc, 4 % hysteresis, adjustable
✓
✓
--
--
--
--
--
--
--
--
--
✓
--
--
--
Adjustable time delay
--
--
--
--
--
--
--
--
--
--
--
✓
--
--
--
Contact: 1 CO
--
--
--
✓
✓
--
--
--
--
--
--
--
--
--
--
Contact: 2 CO
✓
✓
--
--
--
✓
✓
✓
✓
✓
✓
✓
✓
--
--
Contact: 1 changeover contact, 1 NO contact, -1 NC contact
--
--
--
--
--
--
--
--
--
--
--
--
--
✓
Contact: 1 NO contact, 1 NC contact
--
--
✓
--
--
--
--
--
--
--
--
--
--
--
--
Contact: 2 NO contacts, 2 NC contacts
--
--
--
--
--
--
--
--
--
--
--
--
--
✓
--
General voltage monitoring
Reverse voltage detection
For general device and plant protection, voltage relays with
switching thresholds of 0.7 × Uc, i.e.161 V are used. If they have
fixed, non-changeable switching thresholds, they switch back to
normal operation at 0.85 × Uc, 195 V or at 0.9 × Uc, 207 V, depending on the version. If they have adjustable thresholds, they
switch back to normal operation with 4 % hysteresis, 9 V.
If a phase fails, the motors feed a reverse voltage to the missing
phase. However, voltage relays with reverse voltage detection
will disconnect in this case because they are monitoring the
phase angle.
1, 2 or 3 phases to N or 3 phases to N
If a phase fails completely, the voltage relays disconnect with a
delay as specified in the technical specifications.
All voltage relays require an N-conductor. Devices for 1, 2 or 3
phases to N can be used for 1-, 2-, or 3-phase operation. Devices for 3 phases to N require all three phases, whereby the sequence in which they are connected is irrelevant.
Asymmetry detection
If different voltages occur in a three-phase network, this is called
phase asymmetry. Some voltage relays detect an asymmetry of
approx. 6 to 8 % of the phase-to-neutral voltage, i.e. approx.
14 to 16 V and switch off. This type of operation is used for
example to protect motors against a "skew".
N-conductor monitoring
An N-conductor break causes a skew, depending on the phase
load. In extreme cases, this could cause 400 V to be applied to
a phase and destroy the connected devices. Each voltage relay
with asymmetry detection is tripped by an N-conductor break, if
the phase displacement is at least 14 to 18 V.
The 5TT3410 N-conductor monitor detects a phase displacement of 5 %, which is roughly 12 V. This provides earlier protection against overvoltage for connected devices. The N-conductor monitor does not react if the voltage drops or rises in all
phases simultaneously; or if a phase is swapped with the N-conductor.
24
Siemens · 2014
Phase failure detection
Short-time failure detection
Short-time failures upwards of 20 ms cannot be detected with
conventional voltage relays. However, they can occur in the case
of system transfers or lightning strikes and can lead to uncertainty for sensitive process sequences or measuring procedures. The 5TT3407 short-time voltage relay has a reset function
that allows a procedure to be permanently interrupted after a
fault.
Back-up fuse
The voltage relays do not require a back-up fuse as device protection. However, they are often installed in junctions, i.e. in main
supply systems with high fusing. In this case, the supply lead to
the voltage relay must be short-circuit resistant. The back-up
fuse only serves as line protection.
5TT3411 and 5TT3412 voltage relays
Control elements of the 5TT3411 and 5TT3412 voltage relays
see "Insulation monitors for medical premises" on page 40.
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage and frequency relays
■ Overview
■ Application
L1
L2
L3
N
Low-voltage
system
3-phase
Safe external
disconnection,
e.g. via ripple
control receiver
L1 L2 L3 N
X1
CG 1
B1
11
21
31
KA
CG 2
KE
B2
12 14
22 24 32 34
Coupling switch 1
Q1
Q2
The voltage and frequency relay monitors the status of the grid
in the case of in-plant generation systems. Violation of an upper
or lower limit results in shutdown and disconnection of the generation system from the grid. Connection or automatic re-connection of the generation system to the grid only takes place
when the grid frequency and the grid voltage have remained
within their respective tolerance ranges without interruption for
the duration of an adjustable time delay tW. Following shutdown
due to a brief interruption, re-connection takes place when the
grid frequency and grid voltage have remained within the tolerance range for 5 s without interruption.
I202_02440
X2
Coupling switch 2
Inverters
Generator(s)
Generation system
CG = clock-pulse generator
Enable via external contact
L1
L2
L3
Low-voltage
system
N
■ Benefits
L1 L2 L3 N
X1
11
21
31
KA
CG 2
B1
KE
B2
X2
(+)
enabled
(-)
12 14
I202_02441
• Clearance certification of the German Employer's Liability
Association (Energy, Textile, Electrical and Media Products)
• Default settings in accordance with VDE-AR-N-4105
• The voltage and frequency relay meets the high requirements
of VDE AR-N 4105
• It can be used both for centralized and integrated grid and
plant protection
• The latching rotary switches enable fast and easy setting of
the required values
• An illuminated LCD display provides plant status information
• The voltage and frequency relay ensures single-fault tolerance as stipulated in the VDE-AR-N 4105 application guide
• Passive procedure for detecting islanding.
22 24 32 34
disabled
Coupling switch 1
Q1
external CG
Q2
Coupling switch 2
Inverters
Generator(s)
Generation system
CG =clock-pulse generator
Enable using external voltage 24V AC, 40 ... 400 Hz
Siemens · 2014
25
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage and frequency relays
■ Technical specifications
Voltage and frequency relays
5TT3426
5TT3427
IEC/EN 60255-1; IEC/EN 61000; VDE-AR-N-4105
Standards
Power supply Uv
V AC
3 x 85 ... 288
Supply voltage B1/B2
V AC
24 (at 40 ... 400 Hz)
Rated control voltage Uc
V AC
230/400
Rated impulse withstand voltage Acc. to IEC 60664-1
• Contact 31, 32, 34
• KA, KE and measuring circuit
• Pollution degree
kV
kV
6
4
2
Temperature range
°C
-20 ... +60
(in the range 0 °C ... -20 °C, there may be restrictions to the functionality of the
LCD display)
Conductor cross-sections
• Rigid, flexible
• Flexible with end sleeve
• Multi-conductor connection 2 conductors of same
cross-section
mm2
mm2
mm2
0.5 ... 4
0.5 ... 2.5
0.5 ... 1.5
Output relay
Quiescent current
Mode of operation
Contacts
• NO contacts
• NC contacts
AC15
AC15
A AC/V AC
A AC/V AC
3/230
1/230
A AC
5
Switching
cycles
300000
Rise in frequency
Hz
50.2 ... 51.2
Drop in frequency
Hz
47.0 ... 49.8
Rise in voltage
• Phase/neutral
• Phase/phase
V AC
V AC
253 ... 288
--
438 ... 498
Drop in voltage
• Phase/neutral
• Phase/phase
V AC
V AC
184
--
319
Mean rise in voltage over 10 minutes
• Phase/neutral
• Phase/phase
V AC
V AC
253 ... 267
--
438 ... 462
Re-connection time tw
sec
0 ... 600
Disconnection response time
ms
< 100
Connection condition
• Frequency
• Voltage
%
Hz
5
47.5 ... 50.05
Accuracy
• Frequency
• Voltage
% (±1 digit)
% (±1 digit)
±1
±0.02
Dimensions
WxHxD
70 x 90 x 71 mm
Thermal current
Electrical service life
• NO contacts
26
Siemens · 2014
AC15, 1A, AC230
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 voltage and frequency relays
■ Dimensional drawings
L2
L3
N
KA KE 31 32 34
X1 B1 B2 X2
11 12 14
I202_02444
90
L1
21 22 24
71,8
L1
L2
7
L3
N
63
KA KE 31 32 34
L1
L2
L3
N
KA KE 31 32 34
K3
U>>(%)
f<(Hz)
110 112
47,0 47,5 47,8
114
115
116
125 120 118
Off 110
111
112
B1/ K1/ K3 KA/
B2 K2
KE
113
126 125 114
f>(Hz)
48,2
50,2 50,3 50,4
50,5
48,6
50,6
49,8 49,4 49,0
50,8 50,8 50,7
50,8 50,9
0 30 60
51,0
90
51,1
120
180
51,2
240
600 450 300
51,5 51,4 51,3
t w(s)
U10m>(%)
Mode >2s
K3
>50,8
random
B1/ K1/ K3 KA/
B2 K2
KE
<50,9
f>(Hz)
U>>(%)
f<(Hz)
110 112
47,0 47,5 47,8
114
115
116
125 120 118
Off 110
111
112
113
126 125 114
U10m>(%)
50,2 50,3 50,4
50,5
48,6
50,6
49,8 49,4 49,0
50,8 50,8 50,7
50,8 50,9
0 30 60
51,0
90
51,1
120
180
51,2
240
600 450 300
51,5 51,4 51,3
t w(s)
Mode >2s
U>=80%
f>(Hz)
48,2
>50,8
random
<50,9
f>(Hz)
U>=80%
Test
Test
5TT3 426
5TT3 427
X1 B1 B2 X2
K1
K2
11 12 14
21 22 24
X1 B1 B2 X2
I201_18954
K1
K2
11 12 14
21 22 24
I201_18955
5TT3527
5TT3426
■ Circuit diagrams
L1 L2 L3 N
U<>
Ū10m>
KA KE 31 32 34
Channel 1
tw
11
K1
f<>
12 14
31
Error
K3
32 34
Ū10m>
Channel 2
tw
K2
f<>
X1 B1 B2 X2
21
22 24
11 12 14
I202_02439
U<>
21 22 24
5TT3426 and 5TT3427
Siemens · 2014
27
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT6 current relays
■ Overview
Current relays monitor single and three-phase systems for the
flow of current, e.g. in emergency lighting installations, and the
loading of motors. They are available as undercurrent,
overcurrent and under/overcurrent relays.
■ Technical specifications
Standards
Rated control current Ic
Rated control voltage Uc
Primary operating range
Overload capability, continuous
Overload capability, short-time
at 50 °C ambient
temperature max. 3 s
A
V AC
×Uc
A
A
5TT6111
IEC 60255
1 ... 10
230
0.9 ... 1.1
15
20
5TT6112
Hz
50/60
Infinitely variable
permanent, 4 % hysteresis
Infinitely adjustable
Non-adjustable
s
ms
0.1 ... 20
Current corresponds to the rated operational power of the
continuous-flow heater
Between coil/contact
V; mA
kV
10; 100
2.5
NO contacts
NC contacts
A
A
3
1
Electrical isolation
Creepage distances and
Actuator/contact
mm
3
Rated impulse withstand voltage Uimp
Terminals
Conductor cross-sections
Actuator/contact
screw (Pozidriv)
Rigid
Flexible, with end sleeve
kV
Rated frequency
Response values
Switching delay tv
Response time
Minimum contact load
Rated insulation voltage Ui
Contacts
contact (AC-15)
Permissible ambient temperature
Resistance to climate
ON-switching
OFF-switching
>4
1
max. mm2 2 × 2.5
min. mm2 1 × 0.5
°C
Acc. to EN 60068-1
-20 ... +60
20/60/4
5TT6113
5TT6114
5TT6115
A
A
A
A
4 ranges
0.1 ... 1
0.5 ... 5
1 ... 10
1.5 ... 15
Rated control voltage Uc
V AC
230
Primary operating range
Overload capability, continuous
Overload capability independent of
measuring range
×Uc
A
A
0.9 ... 1.1
20
30
Hz
50/60
Rated control current Ic
max. 3 s
Rated frequency
Infinitely variable
permanent, 4 % hysteresis
Response values
ON-switching
OFF-switching
Switching delay tv
Infinitely adjustable
s
0.1 ... 20
Response time
Non-adjustable
ms
see: www.siemens.com/lowvoltage/manuals
V; mA
10; 100
Between coil/contact
kV
2.5
NO contacts
NC contacts
A
A
5
1
Electrical isolation
Creepage distances and
Actuator/contact
mm
3
Rated impulse withstand voltage Uimp
Actuator/contact
kV
>4
Terminals
screw (Pozidriv)
Conductor cross-sections
Rigid
Flexible, with end sleeve
Minimum contact load
Rated insulation voltage Ui
Contacts
contact (AC-15)
Resistance to climate
Siemens · 2014
1
max. mm2 2 × 2.5
min. mm2 1 × 0.5
°C
Permissible ambient temperature
28
5TT6120
IEC 60255
Standards
Acc. to EN 60068-1
-20 ... +60
20/60/4
1 range
0.5 ... 5
15
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT6 current relays
■ Dimensional drawings
5TT611 current relays
5TT6120 current relays
L/i L/i
A1 A2
N L/k
Z2 Z3 Z1 Z4
Z2 Z3 Z1 Z4
12 14
12
12
11
14 11 24 21
14 11 24 21
36
36
i
A 1 A2 i1 k1 A 1 A2 i3 k3
k
18
22
12
22
5
43
5TT6113
5TT6114
42
72
64
5TT6111
5TT6112
32
14 11 24 21 34 31 44 41
5TT6115
I201_11517
22
I201_11518
45
90
A 1 A2
45
90
k
i
43
55
5
5TT6120
■ Circuit diagrams
Graphic symbols
L i L k 14 12
>
11
N
A1 A2 i
>
A1 A2 i
<
k 14 12 24 22
Z1 Z2 Z3 Z4 11
21
k 14 12 24 22
Z1 Z2 Z3 Z4 11
A1 A2
A1 A2 i k 14 12 24 22
><
21
Z1 Z2 Z3 Z4 11
21
>
34 32 44 42
31
41
14 12 24 22
<
11
i1-i3
5TT6111
5TT6112
5TT6113
5TT6114
5TT6120
Typical circuit for
5TT6114
overcurrent monitors
Measurement with transformer
Typical circuit for
5TT6111
undercurrent monitors
L1
5TT6115
21
k1-k3
230 V AC
I201_07522c
N
L1 3 AC 230/400 V
I201_07560b
L2
L3
N
PE
L/i
L/k
N
12 14
11
To the 5TT3460 o
5TT3461 fault
signaling relay
K1
K1
i
A1 A2 12 14
k
11
22 24
21
5TT6114
PE
M
Siemens · 2014
29
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT6 current relays
Typical circuit for
5TT6120
with direct measurement up to 5 A
for under/overcurrent measurement
Typical circuit for
5TT6114
with direct measurement up to 15 A
for overcurrent measurement
L1 3 AC 230/400 V
I201_07559b
L2
L2
L3
L3
N
PE
N
PE
I201_07561b
K1
K1
K1
3 AC 230/400 V
L1
K1
min
i
A1 A2 12 14
k
11
i1 i2
22 24
i 3 A1 A2 12 14
k 1 k2 k 3
21
5TT6114
PE
11
max
22 24 32 34
21
31
42 44
41
5TT6120
M
PE
M
■ More information
Response time
Direct measurement,
transformer measurement
All current relays can be connected with direct measurement or
through transformers.
N potential
Versions 5TT6113 to 5TT6120 can be connected with a separate
N potential.
Current relays are not circuit-protective devices for lines. They
switch with a delay in the ms range.
Overload capability
Independent of the set measuring range and set measured
value, current relays can be permanently overloaded up to 15 A
and 20 A; for 3 s; even up to 20 A and 30 A.
Device overview
5TT6111
5TT6112
5TT6113
5TT6114
5TT6115
5TT6120
Undercurrent
✓
--
✓
--
✓
✓
Overcurrent
--
✓
--
✓
✓
✓
Single-phase
✓
✓
✓
✓
✓
--
Three-phase
--
--
--
--
--
✓
Separate N potential
--
--
✓
✓
✓
✓
Measuring ranges: Jumper:
0.1 ... 1 A
Z1 – Z2
0.5 ... 5 A
Z1 – Z3
1 ... 10 A
Z1 – Z4
1.5 ... 15 A
Z1 – Z3 – Z4
Can be programmed over jumpers
--✓
---
--✓
---
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
-✓
----
✓
--
✓
--
-✓
-✓
-✓
-✓
Contacts
1 CO
2 CO
Buildings/object-safe guiding lights
In the approach corridors of planes, high buildings must be fitted with position lighting. The same planning instructions apply
to the monitoring of this type of lighting and runway lighting as
the monitoring of emergency lighting.
Monitoring of emergency lighting with incandescent lamps
The function of emergency lighting according to DIN VDE 0108
must be checked at regular intervals. The operational current is
continuously monitored using current relays. The lighting can either be integrated in the general lighting system or just supplied
on demand with emergency current.
30
Siemens · 2014
The current relay is set so that it switches on at the max. lamp
current. If an incandescent lamp fails, a fault is signaled.
Monitoring of motors
If the warning is sent early enough, the fault can be eliminated
before the motor starts to overheat and the circuit breaker
switches the motor off.
Current relays reliably safeguard the monitoring of fault-free running motors and, in some cases are more suitable than a voltage
relay, which is geared more towards motor protection.
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT6 current relays
Example: Screw conveyor
Hard objects in screw conveyors, e.g. in sewage treatment
plants, can often jam the conveyor system. Appropriately set,
the current relay signals over its contact(s) that a hazardous
situation has occurred and threatens to block the motor.
Function charts for
5TT61 undercurrent relay signal
UN
I201_07508c
t
Example: Agitators
As with the conveyor processes, changes to the viscosity can
lead to an overload of the motors.
N
Example: Crane motor control system
Hyst.
The current monitoring of the main motor (hoisting motor)
ensures that the electrical holding brake is not released until the
main motor is in operation and the load is held.
Example: Dust extraction
t
1
In the interests of work safety and to protect against massive
dust development, it is essential to ensure that the dust extraction system is working perfectly before a saw or sanding machine is switched on.
4
Fault
2
LED
green
On
Off
LED
red
On
Off
Planning the monitoring of an incandescent lamp
Current relays have a hysteresis of approx. 4 %. The smallest
lamp must not exceed the set measuring range by more than
8 %.
Example: 12 lamps à 100 W = 1200 W, which corresponds to a
current of approx. 5.2 A. If a lamp fails, the current drops by
0.4 A. This 0.4 A corresponds to 8 % of the set measured value
5.2 A.
tv
tv
5TT61 overcurrent relay signal
UN
I201_07469b
Response time
t
The response time of the fault signal is produced by the
"Adjustable switching delay" (see the technical specifications)
and an additional delay, which is determined from the actual
current and the set value.
F
Pickup
ms
1
Hyst.
Dropout
ms
10
250
2
70
70
5
120
30
10
180
15
20
220
10
30
240
12
F=
N
t
1
4
2
LED
green
On
Off
LED
red
On
Off
Fault
Iact
Imeas
Iact:
Instantaneously flowing current
Imeas:
Set current threshold value to be measured
Pickup:
With an overcurrent relay, the contact 11 – 14 (21 – 24)
to the fault signal closes when the instantaneous current flowing
is higher than the switching threshold.
The relay picks up.
Dropout:
With an undercurrent relay, the contact 11 – 12 (21 – 22)
to the fault signal closes when the instantaneous current flowing
is lower than the switching threshold.
The relay drops out.
tv
Siemens · 2014
31
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT6 current relays
Function charts for
5TT6115 under/overcurrent relay signal
UN
I201_07472b
t
N
Hyst.
Hyst.
t
1
4
Fault
Fault
2
LED
green
On
Off
LED
red
On
Off
LED
red
On
Off
tv
tv
tv
Contrary to all other current relays, a fault signal is always output
over the contact 11 – 14 (21 – 24). The red LEDs indicate
whether the signal is for an undercurrent or an overcurrent.
32
Siemens · 2014
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 reverse power relays
■ Overview
The 5TT3424 and 5TT3425 reverse power relays monitor the
direction of the energy transport in an electric grid. This may be
necessary where public grids and industrial grids intersect, e.g.
when using emergency generators, motor-driven generators,
etc.
■ Technical specifications
Reverse power relays
5TT3424
Rated voltage Un
V AC
230, 3-phase systems without N
Rated current In
A
5
%
2 ... 20
Hysteresis
%
12.5 or the set response value
Rated frequency
Hz
45 ... 65
Response delay tan
s
0.2 ... 10, adjustable
Response value
5TT3425
IEC 60255
Standards
Reverse power
400, 1- or 3-phase systems without N
2 CO
Contact arrangement
Output
2 CO
Contact arrangement
Breaking capacity
IEC 60947-5-1
• NO contacts
• NC contacts
• Acc. to DC 13
AC15
AC15
Thermal current
Electrical service life
IEC 60947-5-1
• NO contacts
AC 15, 3A, 230 AC
Reliable switching frequency
Short-circuit strength
with max. melting fuse
A AC/V AC
A AC/V AC
A DC / V DC
3/230
1/230
1/24
A
2x5
Switching
cycles
2 x 105
Switching
cycles/h
1800
IEC 60947-5-1
Mechanical service life
4 A gL
Switching
cycles
30 x 106
°C
-20 ... +60
kV
4
General data
Permissible ambient/storage temperature
Clearance and creepage distances
• Rated impulse withstand voltage
• Pollution degree
II
IEC 60664-1
Degree of protection
• Enclosure
IP40
• Terminals
IP20
Wire connections
0.2 ... 4 mm2 solid or 0.2 ... 1.5 mm2 strand with sleeve
• Fixed screw terminal (S)
Dimensions
WxHxD
70 x 90 x 71 mm
Siemens · 2014
33
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 fuse monitors
■ Overview
Fuse monitors serve to monitor all types and versions of melting
fuses that cannot be equipped with a fault signal contact. This
enables integration in fault signaling circuits or a central alarm in
order to improve plant availability.
■ Technical specifications
5TT3170
IEC 60255; IEC 61810
Standards
Rated control voltage Uc
V
3 AC 380 ... 415
Primary operating range
× Uc
0.8 ... 1.1
Rated frequency
Hz
50 ... 400
Internal resistance of measuring paths
/V
> 1000
Max. permissible rear feed
%
90
Response/release time
ms
< 50
Rated impulse withstand voltage Uimp
Input/output
kV
>4
V AC
250
Rated operational current Ie
AC-1
A
4
Electrical service life
AC-11
in switching cycles at 1 A
1.5 × 105
Terminals
screw (Pozidriv)
Conductor cross-sections
Rigid, max.
Flexible, with end sleeve, min.
Rated operational voltage Ue
1
Permissible ambient temperature
mm2
mm2
2 × 2.5
1 × 0.5
°C
-20 ... +45
20/45/4
Acc. to EN 60068-1
Resistance to climate
■ Dimensional drawings
■ Circuit diagrams
Graphic symbols
L1 L2 L3
14
L1 L2 L3 14
15
L1 L2 L3
36
I201_11512
45
90
L1' L2' L3' 13
5
43
64
■ More information
Typical circuit, function chart
L1 L2 L3 3 AC 400 V
L
If the fuse fails, the motor is immediately disconnected (prevention of two-phase run). After changing the fuse, the motor can be
restarted by pressing the "ON" button.
Unlike conventional motor circuit breakers, it is not possible to
switch the motor on if the fuse is faulty.
N
L1 L2 L3 13
L1/L2/L3
13-14
L1' L2' L3' 14
Off
On
M
3~
34
I201_07251b
Siemens · 2014
I2_07037
F1 F2 F3
Note:
The internal resistance of the measuring paths of the fuse monitor is in the M range so that the VDE regulations with regard to
touch voltage are met in the event of faulty fuses (> 1000/V).
To isolate the main switch, it must be switched off. The enclosed
label should be affixed to the switchgear as a reminder.
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 phase and phase sequence monitors
■ Overview
Phase monitors monitor the voltages in three-phase system and
signal the power failure of one or more phases over a floating
contact. Phase sequence monitors monitor the phase sequence
in three-phase systems and signal any changes in the phase sequence – change of rotating field – over a floating changeover
contact.
■ Technical specifications
5TT3421
5TT3423
IEC 60255
Standards
Rated control voltage Uc
V AC
230/400
Primary operating range
×Uc
0.8 ... 1.1
Hz
50/60
VA
VA
9
0.2
Rated operational voltage Ue
V AC
250
Rated operational current Ie
A
4
Minimum contact load
V; mA
10; 100
Rated frequency
Electronics
Contacts
Rated power dissipation Pv
Rated insulation voltage Ui
Between coil/contact
kV
4
Contacts
contact (AC-11)
A
3
Electrical isolation
Creepage distances and
clearances
Actuator/contact
mm
4
Rated impulse withstand voltage Uimp
Actuator/contact
kV
> 2.5
Terminals
screw (Pozidriv)
Conductor cross-sections
Rigid, max.
Flexible, with end sleeve, min.
Degree of protection
Acc. to EN 60529
Safety class
Acc. to EN 61140/VDE 0140-1
1
mm2
mm2
Acc. to EN 60068-1
Resistance to climate
2 × 2.5
-IP20, with connected conductors
II
°C
Permissible ambient temperature
400
-20 ... +60
20/60/4
■ Dimensional drawings
L1
L2 L3
12
12
14 11
14 11
18
18
I201_10780
45
90
L1 N
L2 L3
5
43
64
5TT3421
5TT3423
■ Circuit diagrams
Graphic symbols
L1 L2 L3
14 12
N
11
5TT3421
L1 L2 L3
14 12
11
5TT3423
Siemens · 2014
35
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 phase and phase sequence monitors
■ More information
Typical circuit diagrams
5TT3421 phase monitors
5TT3423 phase sequence monitors
The phase monitor can be operated either in 1, 2 or 3-phase
operation.
Phase sequence monitors must always be connected in
three-phase.
I201_10776a
L1
N
PE
L1 L2 L3 N
L1 L2 L3
14 12
I2_10779a
11
Single-phase operation
L1
L2 N
L1 L2 L3
11
I201_10777a
K1
L1
L2 L3 N
14 12
11
Two-phase operation
L1 L2 L3 N
I201_10778
M
L1 L2 L3 N
14 12
11
Three-phase operation
36
Siemens · 2014
14 12
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 insulation monitors
for industrial applications
■ Overview
Insulation monitors are used for protection of persons and
against fire in non-grounded systems (IT systems). The insulation resistance of the system being monitored is measured
against ground.
These types of measurements are specified according to
DIN VDE 0100-410 – Power installations up to 1 000 V –
Protection against electric shock.
■ Technical specifications
5TT3470
5TT3471
V AC
V DC
220 ... 240
--
---
×Uc
V DC
0.8 ... 1.1
--
---
Frequency range for Uc
Hz
45 ... 400
--
Rated power dissipation Pv
For DC supply
VA
W
Approx. 2
--
-Approx. 1
Terminals A1 to A2
Terminals L to PU
Terminals A1, A2 to L, PU
Terminals against contacts
kV
kV
kV
kV
<4
<4
<4
<6
<4
<4
<3
<6
Power supply Uc
With AC supply
For DC supply
Primary operating range
Rated impulse withstand voltage Uimp
For three-phase and AC systems For direct voltage systems
Measuring circuit
V AC
V DC
0 ... 500
--
-12 ... 280
Primary operating range
× Umeas 0 ... 1.1
0.9 ... 1.1
Frequency range for Umeas
Hz
10 ... 1000
--
k
5 ... 100
5 ... 200
Infinitely variable
Infinitely variable
Measurement voltage range Umeas
Alarm values
Measuring shunt RAL
Setting of alarm value
On absolute scale
Alternating current internal resistance
Internal test resistance
k
> 250
--
Direct current internal resistance
Internal test resistance
L+ and L- to PU
k
k
> 250
--
-75 each
Measurement voltage Umeas
Internal
V DC
Approx. 15
--
Max. measurement current Imeas
Short circuit
mA
< 0.1
0.2 ... 4 depending on the voltage
Direct interference voltage
Max. permissible
V DC
500
--
Response delay
at RAL 50 k and 1F
and up to 0.9 x Rmeas
and Rmeas from to 0
s
s
< 1.3
< 0.7
0.8
0.4
Switching hysteresis
at Rmeas 50 k
%
15
10 ... 15
Contacts
contact
2 CO
2 CO
V AC
230
230
A
A
A
A
A
A
4
---5
2
4
2
0.2
3
---
2
2
Rated operational voltage Ue
Rated operational current Is
Thermal current limit Ith
DC-13 at 24 V DC
DC-13 at 250 V DC
AC-15
AC-15 NO contacts
AC-15 NC contacts
Terminals
screw (Pozidriv)
Conductor cross-sections
Rigid, max.
Flexible, with end sleeve, min.
Permissible ambient temperature
mm2
mm2
2 × 2.5
1 × 0.50
°C
-20 ... +60
Degree of protection
Terminals (acc. to EN 60529)
Enclosure (acc. to EN 60529)
IP20
IP40
Resistance to climate
Acc. to EN 60068-1
20/060/04
■ Dimensional drawings
PE PT LT1 LT2
A1 A2
PE PT X1 LT
L+ L-
12
22
12
22
14 11 24 21
14 11 24 21
36
36
I201_11519
45
90
L
5
43
64
5TT3470
5TT3471
Siemens · 2014
37
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 insulation monitors
for industrial applications
■ More information
Function charts
l
Uc
R
Insulation resistance
Set value
Without fault storage
11-14
11-12
On
Off
Red LED
With fault storage
Reset-button
11-14
11-12
Red LED
On
Off
I201_11522
5TT3470, 5TT3471
Typical circuit diagrams
5TT3471 for direct voltage systems
5TT3470 for three-phase and AC systems
L1
L2
L3
L+
PE
L-
L
PE
N
PE
L
A1
A2
I201_11520b
PT
LT1
LT2
11
12
14
21
22
24
The power supply to terminals A1 – A2 can be taken from the system being
monitored. However, in this case it is important to ensure compliance of the
voltage range with the technical specifications.
With a jumper LT1 – LT2: a fault signal is not stored; the device is automatically released again if the insulation resistance improves.
Without a jumper LT1 – LT2: The fault signal is stored; pressing the Reset
button or an external key at the terminals LT1 - LT2 clears the fault signal.
Pressing the Test button or an external key at the terminals PT – PE simulates
a fault.
38
Siemens · 2014
L+
PE
I201_11521a
L-
LT
X1
PT 11
12
14
21
22
24
The measurement voltage to the terminals L+ and L- serves at the same time
as the power supply.
With a jumper LT – X1: a fault signal is not stored; the device is automatically
released again if the insulation resistance improves.
Without a jumper LT – X1: the fault signal is stored; pressing the Reset button
or an external key at the terminals LT - X1 clears the fault signal.
Pressing the Test button or an external key at the terminals PT – X1 simulates
a fault.
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
5TT3 insulation monitors
for industrial applications
Front views
PE PT LT1 LT2
L
PE PX X1 LT
A1 A2
L+ L–
LED green
LED green
T1
LED red
T2
T1
LED 1 red
T2
LED 2 red
E1
14 11 24 21
LED green:
LED red:
E1:
T1:
T2:
12
status display (ON)
insulation fault (AL)
alarm value adjuster (RAL)
Test
Reset
5TT3470
5TT3470 for three-phase and AC systems
22
14 11 24 21
LED green:
LED 1 red:
LED 2 red:
E1:
T1:
T2:
I201_11972
22
I201_11971
12
E1
status display (ON)
insulation fault L– (RE–)
insulation fault L+ (RE+)
alarm value adjuster (RAL)
Test
Reset
5TT3471
5TT3471 for direct voltage systems
Direct interference voltage
Leakage capacitance
While direct interference voltages do not damage the devices
they often interfere with conditions in the measuring circuit. In a
system being monitored, only one insulation monitor should be
connected. This must be taken into account if gateways are
used.
The insulation monitor can be installed in systems with high
leakage capacitance to PE. In the case of high-resistance alarm
values, a transient alarm signal may occur when switching on
the system being monitored due to an existing ground leakage
capacitance.
The values of the CE capacitance given the following set values
of R are approximately:
• R = 200 k: CE > 0.8F
• R = 50 k: CE > 2.0F
• R = 20 k: CE > 4.5F
In these applications, you should work without an alarm storage.
Due to the measuring function with bridge circuit, the insulation
monitor does not respond in the event of a simultaneous, exactly
symmetrical ground fault of L+ and L-. However, exactly
symmetrical ground faults are highly unlikely in practice.
LEDs:
• Green LED lights up if power supply Uc is applied
• Red LED 1 lights up for insulation fault L+ to PE
• Red LED 2 lights up for insulation fault L- to PE.
System capacitances against protective ground CE do not
corrupt the insulation measurement as these are implemented
with direct current. However, the response time may be
extended in the event of an insulation fault, namely in the magnitude of the time constant RE times CE.
The power supply to the insulation monitors can be taken from a
separate system or from the one being monitored. However, the
above mentioned power supply range must be taken into
account.
LEDs:
• Green LED lights up if power supply Uc is applied
• Red LED lights up in the event of an insulation fault.
Siemens · 2014
39
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
■ Overview
In areas that conform to Group 2 of DIN VDE 0100-710, any
interruption to the examination and/or treatment of patients
would place those patients at risk.
Limit monitoring
This is prevented through the use of changeover and monitoring
units. These monitor the insulation resistance of the
non-grounded IT system, the load current and the temperature
of the transformer. If the limit value is exceeded, the insulation
monitor gives out a warning signal.
Voltage monitoring
In addition, a special voltage relay monitors the voltage of the
power supply and switches to a second power supply if it falls
below the specified limit values.
■ Technical specifications
Switchover devices
7LQ3361
7LQ3362
IEC 60364-7-710; DIN VDE 0100-710
Standards
Power supply Uv
V AC
230
Primary operating range
× Uv
0.9 … 1.1
Supply frequency fv
Hz
50 … 60
230/400
IEC 60664-1
Insulation coordination
kV
Rated impulse withstand voltage
4
3
Pollution degree
W
Power loss max. Pv
10.7
Power section
Mechanically latched; mechanically and electrically locked
Contactors
Rated operational current acc. to DIN VDE 0100-710
A
51
32
Rated operational current AC-3
A
113
71
Short-circuit protection acc. to DIN VDE 0100-710
• Max. backup protection
gG
A
63
Switchover time
s
0.1 ... 10
k
50
Measuring circuit insulation monitoring
Response value Rresp
EN 61557-8
Response deviation
RF from to 0.5 × Rto
RF from to 0 k
s
s
< 1.3
< 0.7
Hysteresis
%
15
Measurement voltage Um
V DC
Approx. 15
Measurement current Im max (at RF = 0)
µA
< 50
Internal resistance DC Ri
k
> 250
Impedance Zi at 50 Hz
k
> 250
Permissible direct interference voltage Ufg
V DC
< 300
Response time ton at Ron = 50 k, Ce = 1 μF
External/internal
Test button
Measuring circuit load current monitoring
Response value,
adjustable with external transformer 50/5 A, Class 1
A
5 … 50
Hysteresis
%
4
Temperature influence
%/°C
0.05
Time delay tv, adjustable
s
0.1 … 20
Response value
k
3.2 … 3.8
Release value
k
1.5 … 1.8
Measuring circuit temperature monitoring
PTC thermistor
Acc. to DIN 44081/44082 Unit(s)
1 … 6 in series
ON-switching
OFF-switching
× Uc
2 % hysteresis
0.9
4 % hysteresis
0.9
At L1, L2 or L3
ms
--
100
--
Yes
Measuring circuit, voltage monitoring
Response values
Phase failure detection
N-conductor monitoring
40
Siemens · 2014
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Switchover devices
7LQ3361
7LQ3362
Connection
Terminals
• Load circuit
Feeder terminals
Output terminals
mm²
4 ... 16
• Communication
Status signals
Fault indications
mm²
2.5
°C
-20 ... 45
Environmental conditions
Permissible ambient temperature
Vertical
Mounting position
Insulation monitors
7LQ3354
7LQ3355
EN 61557-8
Standards
Power supply Uv
V AC
230
Primary operating range
× Uv
0.9 … 1.1
Supply frequency fv
Hz
50 … 60
Power loss max. Pv
VA
Approx. 7
Rated system voltage Un (measuring circuit)
V AC
0 … 300
Rated frequency fn
Hz
10 … 1000
EMC immunity to interference
IEC 61000-6-2
EMC emitted interference
IEC 61000-6-3
IEC 60664-1
Insulation coordination
kV
Rated impulse withstand voltage
4
Pollution degree
3
Flammability class
UL 94V-0
Measuring circuit insulation monitoring
k
Response value Rresp
50
RF from to 0.5 × Ron
RF from to 0 k
s
s
< 1.3
< 0.7
Hysteresis
%
15
Measurement voltage Um
V DC
Approx. 15
Measurement current Im max (at RF = 0)
µA
< 50
Internal resistance DC Ri
k
> 250
Impedance Zi at 50 Hz
k
> 250
Permissible direct interference voltage Ufg
V DC
< 300
Response value,
adjustable with external transformer 50/5 A, Class 1
A
5 … 50
Hysteresis
%
4
Temperature influence
%/°C
0.05
Time delay tv, adjustable
s
0.1 … 20
Response value
k
3.2 … 3.8
Release value
k
1.5 … 1.8
Response time ton at Ron = 50 k, Ce = 1 μF
50 ... 500
EN 61557-8
Response deviation
Measuring circuit load current monitoring
Measuring circuit temperature monitoring
PTC thermistor
Acc. to DIN 44081/44082 Unit(s)
1 … 6 in series
Display and control elements
Operating error
Acc. to IEC 61557-8
LED display
•
•
•
•
Current and temperature monitoring
Ready-to-run
Insulation fault
Line breakage monitoring of the isolation measuring circuit
One red and one green LED
Green
Red
Red
• Display of current insulation resistance
--
Pushbuttons
Test and Reset
11-step LED chain
Siemens · 2014
41
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Insulation monitors
7LQ3354
7LQ3355
Output relay
Overtemperature
Overload
Insulation fault
Contacts for
2 CO
2 CO
2 CO
Working current
Mode of operation
Contacts
AC-15 NO contacts
AC-15 NC contacts
A AC/V AC
A AC/V AC
3/230
1/230
Electrical service life
AC-15, 1 A, 230 V AC
Switching
cycles
30000
A AC
5
Thermal current
Connection
Terminals
screw (Pozidriv)
• Conductor cross-sections
• Insulation fault
Rigid
Flexible, with end sleeve
2
mm2
mm2
2 × 2.5
1 × 2.5
°C
-20 … +60
Environmental conditions
Permissible ambient temperature
Resistance to climate
Acc. to EN 60068-1
20/060/04
Degree of protection
Acc. to EN 60529
IP20, with connected conductors
Any
Mounting position
Vibration stress
• Amplitude
• Frequency
Acc. to IEC 60068-2-6
mm
Hz
0.35
10 … 55
Test and signaling panels
7LQ3356
7LQ3357
DIN VDE 0100-710; IEC 60364-7-710
Standards
V AC/DC
24
kV
4
Voltage range
AC
DC
0.8 ... 1.1 xUn
0.9 ... 1.2 x Un
Rated current per input
mA
0.25
Rated consumption
VA
6
Rated voltage Un
Rated impulse withstand voltage
Acc. to IEC 60664-1
Continuous operation
Rated operating mode
Pollution degree
Acc. to IEC 60664-1
2
Degree of protection
• Enclosure
• Terminals
Acc. to IEC/EN 60529
Acc. to IEC/EN 60529
IP40
IP20
UL 94V-0
Flammability class
Vibration strain
• Amplitude
• Frequency
Acc. to IEC/EN 60068-2-6
Resistance to climate
Acc. to IEC/EN 60068-1
mm
Hz
0.35
10 … 55
20/045/04
EN 50005
Terminal marking
Wire connections
• Solid
mm2
mm2
1 × 1.5
2 × 0.5
• Strand
mm2
mm2
1×1
2 × 0.2
• Strand with sleeve
mm2
1 × 0.5
Box terminals with wire protection
Conductor mounting
Device dimensions
mm
80 × 160 × 57
Temperature range
°C
-20 ... +45
42
Siemens · 2014
82 × 150 × 57
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Current transformers Class 1
7LQ3358
IEC/EN 60044-1, VDE 0414-44-1
Standards
Rated control voltage Uc
V AC
230
Rated frequency
Hz
50/60
kV
3
Rated transmission ratio kn
A
50/5
Primary rated current
A
50
Secondary rated current
A
5
Rated power
V/A
1.5
Test voltage
50 Hz, 1 min
1
Class
Rated frequency
Hz
50 ... 60
Highest voltage at equipment / insulation level
kV
0.72/3
Overcurrent factor
• Thermal rated short-time current
• Thermal rated continuous current
× In
× In
FS5
60
1.2
Expanded current range
%
120
Permissible ambient temperature
°C
-20 … +60
Test and signaling combination for insulation monitors
7LQ3360
DIN VDE 0100-710; IEC 60364-7-710
Standards
Rated voltage Un
V AC
24
Voltage range
AC
0.8 ... 1.1 × Un
Connected load
W
0.5
Continuous operation
Rated operating mode
EMC
• Static discharge
• RF irradiation
• Rapid transients
• Surge voltage (surge)
Acc. to IEC/EN 61000-4-2
Acc. to IEC/EN 61000-4-3
Acc. to IEC/EN 61000-4-4
Acc. to IEC/EN 61000-4-5
kV
V/m
kV
kV
8 (air discharge)
10
2
1
IP30
Degree of protection
Amplitude
mm
0.35
Frequency
Hz
10 ... 55
Temperature range
°C
-5 ... +55
Resistance to climate
05/055/04
Acc. to IEC/EN 60068-1
EN 50005
Terminal marking
Wire connections
• Solid
• Strand with sleeve and plastic collar
• Strand with sleeve and plastic collar
• Strand with sleeve
DIN 46228-1/-2/-3/-4
DIN 46228-1/-2/-3
mm2
mm2
mm2
2
mm
Box terminals with wire protection
Conductor mounting
Device dimensions
1×4
1 × 2.5
2 × 1.5
2 × 2.5
mm
80 × 80 × 35
Siemens · 2014
43
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Voltage relays
5TT3411
5TT3412
Rated control voltage Uc
V AC
230
230/400
Overload capability
× Uc
1.15
1.1
Rated frequency
Hz
50/60
ON-switching
OFF-switching
× Uc
2 % hysteresis
0.9
V/mA
10/100
At L1, L2 or L3
ms
--
100
--
Yes
Response values
Minimum contact load
Phase failure detection
N-conductor monitoring
Rated insulation voltage Ui
Between coil/contact
kV
Contacts
AC-15 NO contacts
AC-15 NC contacts
3
2
Electrical service life in switching cycles
AC-15, 1 A, 230 V AC
5 × 105
Rated impulse withstand voltage
Acc. to IEC 60664-1
kV
3
1
4
2
± screw (Pozidriv)
Conductor cross-sections
• Rigid
• Flexible, with end sleeve
Permissible ambient temperature
Resistance to climate
4
2
Pollution degree
Terminals
4 % hysteresis
0.9
mm2
mm2
2 × 2.5
2 × 1.5
°C
-20 … +60
Acc. to EN 60068-1
20/060/04
IT line transformers
4AT3/4AT4
In the case of isolating transformers used to set up medical IT systems,
overcurrent protective devices are only permissible as protection against
short circuits. To protect the isolating transformers against overload they
are fitted with monitoring devices that signal an excessive rise in temperature (e.g. 7LQ3354 insulation monitors).
Standards
EN 61558-2-15
Safety class
I
Static shield between primary and secondary winding
with insulated connection
Thermistor transformer protection
Warning in the event of thermal overload1)
With center tap
Insulation monitoring
Short-circuit voltage uz
%
3
No-load supply current i0
• Starting current (rush), max.
%
x I1N
3
8
Rated ambient temperature ta /Thermal Class
1)
Tripping units must be ordered separately.
■ Accessories
SIRIUS 4AT isolating transformers
Further information about the SIRIUS 4AT isolation transformers
can be found in Catalog IC 10 · 2014.
44
Siemens · 2014
55 °C/H
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
■ Characteristic curves
7LQ3354 and 7LQ3355 insulation monitors
The following diagrams show the function of the measuring
circuits of the temperature monitors (top left), the load current
monitors (bottom left) and the insulation monitors (right).
UV
UV
t
R
≥ 3,2 kΩ
≤ 1,8 kΩ
P1/P2
OverPower
temperature/ failure
sensor break
11-14
21-24
RF
Ground fault
Ran
t
t
Break
Measuring circuit
t
I201_13579
Without fault storage
(jumper LT1-LT2)
51-54
61-64
11-12
21-22
51-52
61-62
On
LED “MK“ Off
UV
t
On
LED “AL“ Off
>
Hysterese
N
t
34/44
31/41
LED
green
LED
red >
32/42
on
off
Reset
push-button LT
51-54
61-64
51-52
61-62
With fault storage
(without jumper LT1-LT2)
tv
On
LED “MK“ Off
on
off
I201_13580a
On
LED “AL“ Off
I201_13581
Siemens · 2014
45
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Test and signaling panels
Test and signaling combination for insulation monitors
X1-L1
Line 1 OK
LED 1
U
UH
X1/X2
X2-L1
Line 1 failure
LED 2
t
RE
Ground fault
Ran
X3-L2
Line 2 OK
LED 3
X4-L2
Line 2 failure
LED 4
t
Acknowledgement
pushbutton
X5- Isolation
LED 5
Horn
LED 6
X6- Overtemperature
>
LED 7
ON
X7- Overload
>
LED 8
7LQ3360
I201_13990
Yellow
LED
Green
LED
X11-SM
Output
I201_13989
Horn
X8- Acknowledgement
lamp test
Test /
Dark
Bright
7LQ3356, 7LQ3357
Voltage relays
L3
L2
L1
U
U
UN
La
UN
Lb
U on
Hysteresis
Response
value
U off
t
t
11 - 14
.3 - .4
.1 - .2
I201_13574
5TT3411
11 - 12
I201_13576a
5TT3412
The voltage relay switches at a phase asymmetry of approx. 6 %
to 8 %, regardless of the response values for undervoltage. The
above diagram also shows the timing interval.
46
Siemens · 2014
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
■ Dimensional drawings
Switchover devices
-X1
-X2
-X3
171
K2
K1
900
F2
T01
F3 K13
K6
K7 K8
376
470
K5
585
728
F1
K4
840
K3
K9 K10
225
S1
76
K20
I201_17066
250
132
212
7LQ3361
The 7LQ3361 and 7LQ3362 switchover devices are designed for mounting in series ALPHA 630 DIN floor-mounted distribution
boards and ALPHA AS side-by-side switchgear cabinets with a cabinet depth of at least 320 mm.
More information about the distribution boards can be found in Catalog LV 10.
Contact your local Siemens representative for information on additional versions.
Siemens · 2014
47
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
-X1
-X2
-X3
171
K2
K1
K4
F2
K5
K6
F3 K13
585
728
F1
900
T01
840
K3
376
470
K7 K8
K9 K10
225
S1
76
K20
I201_17067
250
132
212
7LQ3362
The 7LQ3361 and 7LQ3362 switchover devices are designed for mounting in series ALPHA 630 DIN floor-mounted distribution
boards and ALPHA AS side-by-side switchgear cabinets with a cabinet depth of at least 320 mm.
More information about the distribution boards can be found in Catalog LV 10.
Contact your local Siemens representative for information on additional versions.
Insulation monitors
A1
P1
P2
k
PE
L‘
PE‘
L
PT
LT1 LT2
A1
P1
P2
i
k
PE‘ PE
L‘
A2
PT
LT1 LT2
L
45
90
A2
i
14
22
11
24
32
21
34
42
31
44
52
41
54
12
62
51
64
61
14
22
11
24
48
7LQ3355
Siemens · 2014
21
34
42
31
44
52
41
140
105
7LQ3354
32
54
62
51
64
X1
61
X2
X5
I201_13807
12
43
55
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Test and signaling panels
80
10
47
57
I201_13986
I201_13985
150
160
82
7LQ3356
7LQ3357
Current transformers
55
80
27
I201_13810
10
78
I201_14002
Test and signaling combination for insulation monitors
ON
30
20
60
TEST
6,5
46
55
80
6
35
7LQ3360
40
7LQ3358
Voltage relays
N
La
Y1
11
12
23
24
33
34
41
42
L1
L2
L3
N
23
31
45
90
Lb
Y2
14
72
5TT3411
72
32
11
24
I201_13712
12
43
55
5TT3412
Siemens · 2014
49
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
■ Circuit diagrams
Switchover devices
X1:1 X1:2 X1:PE
L1
N
Line 1
X1:4 X1:5 X1:PE
L1
N
Line 2
X2:5 X2:3
L1
L2
IT system load
To IT transformer
L1
N
X1:7 X1:8
From IT transformer
L1
L2
N (MZ)
X2:1 X2:2
X2:4
X2:S X2:10 X2:11
115
115
2N
SCH
P1
P2
I201_17068
230 0
7LQ3361
X1:1 X1:2 X1:3 X1:4 X1:PE
L1
L2
L3
N
Line 1
X1:5 X1:6 X1:7 X1:8 X1:PE
L1
L2
L3
N
Line 2
X2:2 X2:6 X2:8
L1
L2
L3
IT system load
To IT transformer
L1
L2
L3
N
X1:9 X1:10 X1:11 X1:12
400
400
230
230
230 2N
SCH
P1
P2
I201_17069
400
From IT transformer
L1
L2
L3 N(STP)
X2:1 X2:4 X2:7 X2:10 X2:S X2:12 X2:13
7LQ3362
X3:1
X3:2
Line 1
Line 1
Line 2
Line 2
Operation Failure Operation Failure
X3:4 X3:5
X3:6
X3:7
X3:8
X3:9
IT transformer
Temperature
Current
monitoring
monitoring
X3:10
X3:11
X3:12
ISO
monitoring
X3:13
X3:14
X3:15
I201_17070
Test button
ISO
Circuit diagram of 7LQ3361 and 7LQ3362 switchover device to test signaling device (e.g. 7LQ3356 or 7LQ3357 test and signaling panels)
50
Siemens · 2014
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
X3:16 X3:17
X3:18
X3:19
X3:20
Line 2
Failure
X3:21
Temperature
monitoring
X3:22
X3:23
IT system
Current
monitoring
X3:24
X3:25
ISO
bad
X3:26
Contactor
Line 1 not
switched off
ISO
good
X3:27
X3:28
X3:29
Contactor
Line 2 not
switched off
X3:30
I201_17071
IT transformer
MCB
Line 1
Line 2
Line 1
tripped Operation Operation Failure
Circuit diagram of 7LQ3361 and 7LQ3362 switchover device to the central building control system devices
Insulation monitors
P1
P2
i
k
A1
L'
A2
PE'
L
Transformer protection
PE
PT
Insulation monitors
LT1
7LQ3354
11 14 12
21 24 22
31 34 32
41 44 42
51 54 52
61 64 62
I201_13713b
LT2
7LQ3354
P1
P2
i
k
A1
L'
A2
Transformer protection
L
PE'
PE
PT
Insulation monitors
LT1
7LQ3355
11 14 12
21 24 22
31 34 32
41 44 42
51 54 52
I201_13811b
LT2
X1 X2 X5
61 64 62
7LQ3355
Test and signaling panels
A2 SM PT2 PT1 X8
X7
X6
X5
X4
X3
X2
X1
X5
X2
X1
PT2
PT1
+
A1
Test and signaling combination for insulation monitors
PT
ON
QH/LT
1
2
3
4
5
Test
Ground fault
6
7
8
Receipt
I201_13988
I201_13987
7LQ3360
7LQ3356, 7LQ3357
Voltage relays
La
Y1 Y2
31
I201_13714a
Lb
11 23
33
41
12 24
34
42
23
11
32 24 14 12
L3 L2 L1
N
N
5TT3411
5TT3412
Use La und Lb for monitoring 2 phases or 2-channel monitoring
of 1 phase. If only La is used, Lb must be bridged with La.
Siemens · 2014
51
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
■ More information
Connection examples
Switchover devices
7LQ3361 / 7LQ3362
Terminal block X3
LINE 1
Test button
ISO
X3:1
LINE 2
IT transformer
Temperature
monitoring
Operation Failure Operation Failure
X3:2
X3:4
X3:5
X3:6
X3:8
X3:7
X3:9
X3:10
Current
monitoring
X3:12
X3:11
ISO
monitoring
X3:13
X3:14
X3:15
L (L+)
N (L-)
X8
A1
A2
SM
Acknowledgment
key external
Insulation
OK
Insulation
Fault
Transformer
Temperature
X7
Output
Group message
X6
X5
Transformer
Overload
X4
Line 2
Operation
Line 1
Failure
Line 1
Operation
X3
Line 2
Failure
X2
X1
PT2
Test button
PT1
7LQ3356 / 7LQ3357
I202_01367a
7LQ3361, 7LQ3362
Insulation monitors
230 V AC
L
Isolating transformer
3.15 ... 8 kVA
N
1)
Current transformer
L1
7LQ3358
L2
PE
PE
P1
P2
i
k
A1
A2
L'
Transformer protection
L
PE '
PE
PT
Insulation monitor
I201_17057a
7LQ3354
11 14 12
21 24 22
>
Overtemperature
31 34 32
41 44 42
51 54 52
61 64 62
>
Overcurrent
X1 X2 X5
1) If there is no center tap,
L/L' is connected to L1 or L2.
2) The 24 V AC power supply unit (e.g. 4AC3616)
needs to be powered over the IT system.
7LQ3354
52
Siemens · 2014
24 V AC 2)
4AC3616
PT1
7LQ3360
Test and
signaling combination
PT2
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Insulation monitors
L
Isolating transformer
N 3,15 … 8 kVA
L1
Current transfor.
1)
7LQ3 358
230 V AC
PE
L2
PE
External test
P1
P2
i
k
Transformer
protection
L'
A2
A1
PE
PT
Jumpers =
non-latching
LT1
Reset
External
LT2
Insulation monitor
I201_13994a
7LQ3355
'
PE
L
PE PT
11 14 12
21 24 22
31 34 32
>
Overtemperature
1)
41 44 42
>
Overcurrent
51 54 52
61 64 62
RF < RAL /
Measuring circuit break
Insulation fault
X1 X2 X5
X1 X2 X5
PT1 PT2
7LQ3360
Test and
signaling combination
If there is no center tap, L/L' is connected to L1 or L2.
7LQ3355
Up to four 7LQ3360, 7XV9306, 7XV9304 or 7XV9302 test and signaling combinations can be connected; compare with connection example and comparison
of contact assignment between previous and current test and signaling combinations
Test and signaling panels
Voltage monitoring
OK
OK
Failure
Line 2
Failure
Line 1
7LQ3354 / 7LQ3355
11 14 31 34 51
54
X1 ... X7
Fault signaling inputs
X8
Acknowledgement horn/lamp test
SM
Central indication output
PT1, PT2
Test button for insulation monitors
PT PE
L(L+)
externo
QH / LT
X2
X1
1
2
X3
3
X4
4
X5
5
6
X6
7
X7
X8
SM
A1
PT1
8
I201_13991a
PT2
7LQ3356 /7LQ3357
A2
N(L-)
7LQ3356, 7LQ3357
Siemens · 2014
53
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Connection example for 7LQ3355 insulation monitors with 7XV9306 test and signaling combination
L
230 V AC
1)
Isolating transformer
3.15 ... 8 kVA
N
L1
7LQ3358
Current transformer
L2
PE
PE
External test
P1
P2
i
k
A1
A2
L'
Transformer protection
PE '
L
PE
Jumper =
non-latching
PT
Insulation monitor
LT1
7LQ3355
11 14 12
21 24 22
>
Overtemperature
31 34 32
Reset
LT2 External
41 44 42
51 54 52
61 64 62
R F < R on
/ measuring circuit interruption
Insulation fault
PT
>
Overcurrent
X1 X2 X5
52
51 PE
4
5
B1
18
2
3
A1 A2
5TT3185
7XV9306
6
15
4
24 V AC 2)
4AC3616
5
2
3
7XV9306
6
4
5
1) If there is no center tap, L/L' is connected to L1 or L2.
2) The 24 V AC power supply unit (e. g. 4AC3616) needs to be powered over the IT system.
2
3
7XV9306
6
4
5
2
3
7XV9306
6
I201_13812d
7LQ3355
Up to four test and signaling combinations (e.g. the 7LQ3360
test and signaling combination and the previous 7XV9306,
7XV9304 or 7XV9302 test and signaling combinations (now no
longer available) can be connected.
54
Siemens · 2014
An external 24 V AC (e.g. 4AC3616) transformer is required to
power the test and signaling combination.
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Test
24 V AC
Fault input
7XV9304
7LQ3360
7XV9302
2
1
31
X5
3
2
32
PT1
4
3
33
PT2
5
4
34
X2
6
5
35
X1
I201 13813c
7XV9306
Comparison between the contact assignment for the previous, no longer available test and signaling combinations 7XV9306, 7XV9304 and 7XV9302
and the contact assignment for the current 7LQ3360 test and signaling combination .
Monitoring of medical premises
IT system
Medical premises are all rooms used for the examination or treatment of persons or animals. Besides doctors' surgeries and clinics, these also include hydrotherapeutic and physical therapeutic treatment and massage rooms.
In the IT system name, the first letter describes the grounding relationships of the current source. I stands for insulation of all live
parts from ground or the linking of a point to ground over an impedance. The second letter identifies the grounding relationships of the body of the electrical system.
TÜV-certified switchover and monitoring devices are used for a
reliable power supply. The insulation monitors and voltage relays
in the switchover and monitoring devices need to comply with
the requirements of standard DIN VDE 0100-710 and
IEC 60364-7-710.
T means that the body is directly grounded, independently of
any existing grounding of a point of the power source.
IT system
L1
Medical premises were divided up into three groups in
DIN VDE 0100-710, which was published in 2002.
L2
L3
I201_12110
For premises in groups 0 and 1, the standard requires, among
other things, implementation of the system type TN-S and
residual current protective devices (RCDs) for protection against
excessively high touch voltages.
The premises of group 2 are defined as follows:
• The system must not be disconnected in the event of a first
short circuit to frame or to ground or if the general power
supply fails.
• Repetition of treatment is unacceptable for patients or it is
impossible to obtain results of examinations again.
• An irregularity (a fault) in the power supply can cause danger
to life.
• A piece of equipment used for medical purposes, which is
used occasionally for applications in accordance with DIN
VDE 0100-710.2.7, should be assigned to group 2.
Typical locations in group 2 are anesthetic rooms, operating
rooms and recovery rooms in hospitals, clinics or doctors'
surgeries, as well as equipment used in veterinary medicine.
Standard DIN VDE 0100-710 makes the following stipulations:
• Constant monitoring of the power supply on the preferred
supply line and on the second supply line
• Automatic changeover to the second supply line within a
defined time (< 0.5 s or < 15 s)
• Reliable operation even if a fault occurs (one-fault security).
The switchover device monitors the supply voltage on the preferred and second supply line for undervoltage and power failure. As soon as a voltage drop to a defined value is determined,
the voltage relays respond and the switchover device automatically switches to the second supply line. As soon as the power
is restored on the preferred supply line, the system switches
back to it.
Body
PE
Medical IT systems
Standard DIN VDE 0100-710 makes the following stipulations for
a medical IT system in group 2:
• The medical IT system must be used for socket outlet circuits
in the patient environment. This also applies for circuits supplying operating room lights.
• At least one IT system is required for each room group.
• Separate circuits must be provided for multiple socket outlets.
• First faults must not lead to disconnection of the system.
The IT system is powered by an isolating transformer or an independent power source (such as a battery). The special feature
is that no active conductors in this network are linked directly to
ground. This has the advantage that only a small residual current
can flow in the event of an insulation fault. This is essentially dictated by the leakage capacitances and is harmless to patients
and staff. The upstream fuse element does not respond so that
the power supply, and therefore operation, is maintained, even
in the event of a phase-to-ground fault. The high reliability of an
IT system is ensured by continuous insulation monitoring. The
insulation monitor detects insulation faults as they develop and
signals in good time if a value falls below a limit value, before any
further insulation faults can lead to an unexpected shutdown.
The temperature of the transformer and the transformer load
continue to be monitored constantly. Any exceeding of limit
values is signaled immediately.
Siemens · 2014
55
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Insulation monitoring
Voltage monitoring
The 7LQ3354 and 7LQ3355 insulation monitors are used for the
monitoring of the insulation resistance of non-grounded
IT systems in medical premises. They also simultaneously monitor the load current and the temperature of the IT isolating transformer. The devices can monitor both three-phase and AC systems.
In the case of undervoltage, there is no guarantee that medical
equipment will continue to function. Because of the risk this
presents to patients, e.g. during operations, it is essential that a
switchover unit switches to a second power supply in the event
of an undervoltage in the preferred power supply.
Temperature measurement: The temperature in the transformer
winding is recorded using a PTC thermistor or NC contacts.
As well as an adjustable response value of 50 ... 500 k, the
7LQ3355 insulation monitor also has an 11-step LED chain for
displaying the current insulation resistance of the system. A
range of different colored LEDs indicates the insulation resistance within the range of 20 k … 1 M. This allows insulation
deteriorations to be detected even before an alarm is triggered.
The device is also equipped with an additional relay for connection of a test and signaling combination. This allows the
7LQ3360 test and signaling combination and the previous and
no longer available test and signaling combinations 7XV9306,
7XV9304 and 7XV9302 to be connected to the 7LQ3355 insulation monitor (see also the graphic under "Connection example:
7LQ3355 insulation monitors with 7XV9306 test and signaling
combination").
The voltage relays switch when the voltage falls below 90 % of
the rated voltage. The 5TT3411 relays serve to monitor a singlephase infeed. Three-phase infeeds can be monitored using
5TT3412 relays. These relays also offer asymmetry, reverse voltage and phase failure detection.
TÜV-certified switchover device
The 7LQ3361 and 7LQ3362 switchover devices have been
tested and certified by TÜV Rhineland. Switchover devices
comply with DIN VDE 0100-710:2002-11 and
IEC 60364-7-710:2002-11.
Load current sensing: The 7LQ3358 current transformer detects
the load current of a phase. Evaluation is carried out over the
7LQ3354 and 7LQ3355 insulation monitors.
Evaluation: If one of the values is outside the limit values, an
alarm is triggered. The LED for the relevant fault lights up and the
alarm relay switches. The information is made available over the
changeover contacts and can be displayed on the 7LQ3356 and
7LQ3357 test and signaling panels.
Rhineland TÜV certificate for 7LQ3361 and 7LQ3362 switchover devices
56
Siemens · 2014
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Components and control elements in 7LQ3361 and 7LQ3362 switchover devices
Meaning
2
1
3
4
1
Terminal block X1
2
Terminal block X2
3
Terminal block X3
4
Mechanical latching
5
Miniature circuit breakers (MCBs)
6
Voltage relay test pushbuttons
7
Insulation monitors
8
Temperature monitoring test pushbuttons
5
I201_17073
6
8
7
Control elements for insulation monitors
1 2
A1
P1
34 5
P2
A2
i
k
PE
L‘
PE‘
L
PT
LT1 LT2
6
10
7
8
11
9
14
22
11
24
32
21
34
42
31
44
52
41
54
Meaning
Current monitoring
(green)
Lights up if the current is correct
(Go state)
2
Current monitoring
">I" (red)
Lights up in the case of overcurrent
3
Insulation monitoring "ON" Lights up when the power supply is
(green)
switched on (ready-to-run)
4
Insulation monitoring "MK" Lights up if a line of the measuring circuit
(red)
is interrupted (L, L’, PE, PE’)
5
Insulation monitoring "AL" Lights up in the case of an insulation fault,
(red)
RF<Ron (value has fallen below the
response value)
5a
Line insulation monitoring 11-step LED chain to display the current
"RF" (red, yellow, green)
resistance
6
Temperature monitoring
(green)
Lights up when the power supply is
switched on
7
Temperature monitoring
(red)
Lights up in the event of overtemperature
or an interruption in the sensor circuit
Pushbutton/rotary controller
Meaning
8
Rotary controller
response value ">I"
Setting of the response value for current
monitoring
9
Rotary controller
delay time
Setting of delay time after which the CO
contacts return to their normal position if
the current value exceeds the set
response value.
9a
Rotary controller response Setting of the response value for insulavalue "Ran k"
tion monitoring
10
"TEST" pushbutton
Pressing the "Test" test button simulates
an insulation deterioration in the measuring circuit (RF approx. 40 k), thus
checking that the insulation monitor is
fully functional.
11
"Reset" button
Deletion of fault if fault storage is
activated
62
51
64
I2_13716
12
LED
1
61
7LQ3354
1 2
A1
P1
P2
5a
i
k
A2
3 45
PE‘ PE
L‘
PT
LT1 LT2
L
6
10
7
8
11
9a
9
14
7LQ3355
22
11
24
32
21
34
42
31
44
52
41
54
62
51
64
X1
61
X2
X5
I2_13814
12
Siemens · 2014
57
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Electrical Values
7LQ3 monitors for medical premises
Control elements of the test and signaling panels
7LQ3 356
LED window displays
Meaning
Line 1 On
Power supply is implemented over the
preferred infeed
line 1
on
line 2
on
Line 2 On
+ Line 1 Failure
Power supply is implemented over the
second line as the preferred infeed has
failed
line 1
failure
line 2
failure
Line 1 On
+ Line 2 Failure
Power supply is implemented over the
preferred infeed. However the second
line is no longer available
Line 2 On
+ Line 1 Failure
+ Line 2 Failure
Power supply is implemented over the
second line as the preferred infeed is
faulty. There is undervoltage on the
second line
Overload
Excessive power consumption of the IT
system
Overtemperature
The transformer of the IT system is
overloaded
Insulation is good
The transformer of the IT system is
overloaded
Insulation is defective
The insulation resistance of the IT system
is too low
Test
Pushbutton for testing the insulation
monitoring devices
Acknowledgement
pushbutton/lamp test
Pushbutton for acknowledging the
acoustic alarm signal/function test of the
display elements
>
insulation
ok
I201_13995
test
7LQ3356, 7LQ3357
Note:
Customized reporting and signaling panels can be produced,
for instance with an integrated intercom, for the switchover and
monitoring devices. For more information on this contact your local Siemens representative.
Control elements of the test and signaling combination
LED/pushbutton
Meaning
ON
green LED
The LED lights up if the power supply is
applied
Ground
fault
Yellow LED
Insulation fault: the insulation resistance
of the IT system is too low
Test
Pushbutton for testing the insulation
monitoring devices
Acknowledgement
pushbutton
Button for acknowledging the acoustic
alarm signal
LED/pushbutton
Meaning
ON
I2_13996
TEST
7LQ3360
Control elements of voltage relay
N
La
Lb
Y1
Y2
11
23
L1
12
L2
L3
N
23
24
31
2
1
2
1
2
2
41
42
5TT3411
58
12
14
5TT3412
Siemens · 2014
32
11
24
I2_13720
34
I2_13717
33
1
5TT3411: yellow LED The LED lights up if the system is
5TT3412: green LED fault-free
2
Test button
Pressing the test button simulates an
undervoltage. The three-phase 5TT3412
voltage relay has a test button for each
phase.
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 fault signaling units
■ Overview
Fault signaling units are used in small plants where the installation of complex fault signaling systems would be too labor-intensive and too expensive. In the event of a fault, they enable fast
fault localization of all monitoring devices and limit monitors
installed in a plant from a central location. This increases plant
availability. With the correct sensor configuration, they also
provide the option of preventative maintenance.
• 4 fault signaling inputs with LED
• 1 LED as centralized fault indicator
• One unit each for centralized fault indication and acoustic
signaling
• With acknowledgment for acoustic indicators
• Open-/closed-circuit principle to the 4 inputs can be adjusted
via jumpers X1 - X2
• A maximum of 39 5TT3461 expansion fault signaling units can
be connected to the 5TT3460 centralized fault signaling unit
• The maximum possible cable length between 5TT3460 centralized fault signaling units and 5TT3461 expansion fault signaling units is approx. 100 m with a conductor cross-section
of 1.5 mm2
■ Technical specifications
5TT3460
5TT3461
IEC 60255; IEC 61810
Standards
Rated control voltage Uc
V AC
230
Primary operating range
× Uc
0.8 ... 1.1
Rated frequency fn
Hz
50/60
Fault signaling inputs S1 ... S4
V AC
230
Signal voltage
V
7 ... 10
Noise pulse duration
ms
100
Acknowledgment pulse duration
ms
200
• Rated operational voltage Ue
V AC
230
--
• Rated operational current Ie
A
5
--
• Minimum contact load
V; mA
10; 100
--
To terminals S and H
Contacts
Connections
screw (Pozidriv)
• Terminals
• Conductor cross-sections
- Rigid, max.
- Flexible, with end sleeve, min.
Permissible ambient temperature
Acc. to IEC 60068-2-30
Humidity class
PZ 1
mm2
mm2
2 × 2.5
1 × 0.5
°C
-20 ... +60
F
■ Dimensional drawings
A1
S H
A1
S
H
S1 S2 S3 S4
13 23 X1 X2
X1 X2
14 24 QH A2
I201_11511a
45
90
S1 S2 S3 S4
A2
36
36
5TT3460
5TT3461
5
43
64
■ Circuit diagrams
Graphic symbols
A2
S1
S2
S3
A1
S4
14
24
13
23
A2
S1
S2
S3
X1
X2
S
H
X1
5TT3460
X2
S
H
QH
S4
I201_00155
I201_00154
A1
5TT3461
Siemens · 2013
59
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 fault signaling units
Typical circuit, function chart
L1 230 V AC
N
Acknowledgement
key
A1 A2
13
23
S1
S2
S3
S4 QH
14
24
X1
X2
S
H
A1 A2
S1
S2
S3
S4
X1
X2
S
H
SM
5TT3461
(Working current)
I201_07282d
5TT3460
(Closed-circuit
current)
Fault
alarm
FA
If there is a fault, the SM fault indication contact closes and a
centralized fault is indicated over an LED. The assigned LED
remains lit until the fault is eliminated. Until the acknowledgment,
momentary faults can be identified by the remaining centralized
fault.
The terminals A1, S1 to S4 and QH must be operated in-phase.
If no external acknowledgment key is connected, terminal QH
must be applied to L1.
If jumper X1 – X2 is inserted, open-circuit protection (otherwise
closed-circuit protection).
Contacts 13/14 and 23/24 close in the event of an incoming fault.
The assigned LED and the SM centralized fault indication LED
light up.
The alarm sensor (contact 13/14) is switched off using the acknowledgment key. The assigned LED and the centralized fault
indication LED continue to light up and contact 23/24 remains
closed until the fault is eliminated.
Cables S and H carry an extra-low voltage. In the case of long
connections between different distribution boards a shielded
cable must be laid parallel to the installed load lines.
As a light signal sensor for the group messages we recommend
devices 5TE57 or 5TE58; as an alarm sensor the devices
5TT3450 to 5TT3453.
Fault 1
LED 1
Fault 2
LED 2
LED SM
Central indication
relay
Central indication
horn
Acknowledge.
horn
I201_07283c
dark
60
Siemens · 2013
bright
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT5 EMERGENCY STOP modules
■ Overview
EMERGENCY STOP circuits are common safety measures in all
laboratory equipment and industrial plants. The EMERGENCY
STOP modules used here must meet the most rigorous demands
with regard to functional reliability. Benchmark is the degree of
self-monitoring.
■ Technical specifications
5TT5200
IEC 60204-1; EN 60204-1 (VDE 0113-1)
Standards
Supply
• Rated control voltage Uc
- Primary operating range
V AC
×Uc
230
0.8 ... 1.1
Hz
50
• Rated power dissipation Pv
Coil/drive
Contact per pole
VA
3.5
0.8
Control voltage
Terminal Y1
V AC/DC
24
Control current
Terminal Y1
mA DC
45
ms
500
• Electrical isolation, creepage distances and clearances, actuator/contact
mm
3
• Rated impulse withstand voltage Uimp drive/contact
kV
>4
A
A
A
3
2
5
• Rated frequency fn
Recovery time
Safety
Contacts
• Contacts
NO contacts
NC contacts
NO contact/NC contact
AC-15
AC-15
AC-1
• Contact gap
• Electrical service life
AC-15, 2 A, 230 V AC
• Reliable switching frequency
Vibration resistance
Amplitude
Acc. to EN 60068-2-610
Up to 55 Hz
mm
>1
Switching
cycles
105
Switching
cycles/h
600
mm
0.35
Connections
• Terminals
± screw (Pozidriv)
PZ 1
• Conductor cross-sections of main current paths
- Rigid
Max.
- Flexible, with end sleeve
Min.
mm2
mm2
2 × 2.5
1 × 0.5
Permissible ambient temperature
°C
0 ... +50
Acc. to EN 60068-1
Resistance to climate
0/55/04
■ Dimensional drawings
5TT5200 EMERGENCY STOP modules
16
A1
Y1
A2
Y2
13 23 33 41
14 24 34 42
71
I2_08437a
45
90
Netz K1/2
5
43
55
Siemens · 2013
61
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT5 EMERGENCY STOP modules
■ Circuit diagrams
Typical circuit diagrams
L1
L1
EMERGENCYSTOP
On
EMERGENCYSTOP
On
K3
K4
A1
Y1
13 23 33
Y2
A1
41
Y1
Y2
K1
13 23 33
41
24 34
42
K1
Monitoring
logic
Monitoring
logic
K2
K2
L1 L2 L3
A2
14
24 34
A2
42
K3
14
K4
N
N
I201_08435b
N
I201_08436b
Direct connection 230 V/400 V to 5 A
Connection of external contactors
The monitoring logic checks internal relay contacts (not shown)
to see whether both relays have been released prior to switching
on. This ensures that no contacts are welded. The voltage level
at terminal A1 is also monitored. The parallel NC contacts K1
and K2 (terminals 41 and 42) can be connected as required.
External contactors may be used when they are equipped with
positively driven contacts according to safety regulations
ZH1/457 of the German Trade Association. Contactors with 3 NO
contacts and 1 NC contact must be used, in which case the NC
contacts must be integrated in the monitoring loop – terminals
Y1/Y2. The parallel NC contacts K1 and K2 (terminals 41 and 42)
can be connected as required.
62
Siemens · 2013
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 level relays
■ Overview
Level relays are used for the monitoring and control of conductive, non-combustible liquids and powders. They ensure overflow and dry run protection. Due to their sensor performance, the
devices can also be used for general resistance monitoring.
LED displays:
- Green LED: lights up when operational voltage is applied
- Yellow LED: lights up if MIN output relay is activated
- Red LED:
lights up if MAX output relay is activated.
■ Technical specifications
5TT3435
IEC 60255; IEC 61810
Standards
Supply
• Rated control voltage Uc
- Primary operating range
V AC
×Uc
230
0.8 ... 1.1
• Rated frequency fn
Hz
50/60
Setting range of the liquid level
k
2 ... 450
%
%
3
6
Switching point hysteresis of set value
• At 450 k
• At 2 k
Voltage temperature influence
From set value
%
<2
Max. cable length to the
Electrodes at 100F/km
Set value k
450
100
35
10
5
m
m
m
m
m
50
200
500
1500
3000
Electrode voltage
Max.
V AC
Approx. 10
Electrode current
Max.
mA AC
Approx. 1.5
Response delay
adjustable
s
0.2 ... 20
OFF-delay
adjustable
s
0.2 ... 20
Rated operational voltage Ue
V
250
Rated operational current Ie
A
5
kV
kV
kV
4
4
4
Test voltage
Input/auxiliary circuit
Input/output circuit
Auxiliary/output circuit
Connections
• Terminals
screw (Pozidriv)
• Conductor cross-sections
- Rigid
- Flexible, with end sleeve
Max.
Min.
Permissible ambient temperature
PZ 2
mm2
mm2
2 × 2.5
1 × 0.5
°C
-20 ... +60
20/60/4
Acc. to EN 60068-1
Resistance to climate
■ Dimensional drawings
5TT3435 level relays
5TG8223 immersion electrodes
21
X1 COM X2
36
140
5
5
79
22
14 11 24 21
43
64
I201_12435
12
I201_13760
13
45
90
MINMAXA1A2
5
5TT3435
Ø16
5TG8223
Siemens · 2013
63
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 level relays
■ Circuit diagrams
Graphic symbols
X1 X2 A1 A2
MIN MAX COM
14 12 24 22
11
21
Typical circuit for 5TT3435
One-step level control
L1
N 230 V AC
A1
A2
14
11
12
24
21
22
MAX
MIN
The one-step level control is particularly suitable for dry run or overrun
protection with free inflow/outflow.
Level
The COM reference electrode and
MAX electrode are needed.
MAX
MIN
COM
Supply
0
MAX
X1
Without the jumper X1-COM only
relay 21-22-24 switches.
With the jumper X1-COM both
relays switch together.
21-24
X1 COM X2 21-22
21-24
X1 COM X2 21-22
X2
I201_07520d
11-14/21-24
X1 COM X2 11-12/21-22
11-14/21-24
X1 COM X2 11-12/21-22
t
I201_07518b
Level
COM X2
t
t
Static current
Load current
COM X2
t = tv max adjustable from 0.2 s to 20 s
Two-step level control
UH
N 230 V AC
L1
The 2-step level control keeps the
liquid level between a minimum
and a maximum level. Three electrodes are required: MIN, MAX and
COM.
0
Level
A1
A2
MAX
MIN
MAX
MIN
MAX X1
Without the jumper X1-COM,
switching is as follows:
2
14
11
21-24
12
21-22
24
21 X1 COM X2
11-14
22
11-12
MIN
COM
1
• If the MAX level is fallen
below/exceeded, only relay
21-22-24.
• If the MIN level is fallen
below/exceeded, only relay
11-12-14.
With the jumper X1–COM, both
relays switch together if the value
exceeds the MAX level or falls
below the MIN level.
X2
21-24
21-22
X1 COM X2
Level
11-14, 21-24
X1 COM X2 11-12, 21-22
I201_07521d
I201_07519b
11-14
11-12
11-14, 21-24
X1 COM X2 11-12, 21-22
tv max
t v min
COM X2
Static current
Load current
COM X2
tv max and tv min adjustable from 0.2 s to 20 s
64
Siemens · 2013
t v min
tv max
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 line circuit relays
■ Overview
Line circuit relays are used to interrupt circuits and prevent electromagnetic fields in circuits where there are currently no active
loads.
If the loads are disconnected, and the line circuit relay measures
a usage of only 2 to 20 VA - adjustable - it disconnects the cable
to the supply voltage and switches over to extra-low voltage. As
soon as loads are reconnected, the line circuit relay detects the
increase in usage and switches back to the supply voltage.
While the line circuit relay switches off any unnecessary system
components, it is not a device for ensuring isolation in the sense
of safe disconnection.
The line circuit relay is unable to detect consumers with electronic power supply units, e.g. electronically controlled vacuum
cleaners. It is expedient to connect such devices to a base load
resistor (PTC resistor) so that the line circuit relay is reset to supply voltage.
■ Technical specifications
5TT3171
IEC 60255; IEC 61810
Standards
Rated control voltage Uc
V AC
230
Primary operating range
×Uc
0.85 ... 1.15
Rated frequency
Hz
50/60
VA
VA
5
2.6
V
3
VA
2 ... 20
Electronics
Contacts
Rated power dissipation Pv
Monitoring voltage
Response value
adjustable
Release value
% of the response value
Rated impulse withstand voltage Uimp
Input/output
70
kV
>4
V AC
250
AC-1
AC-11
A
A
16
3
Electrical service life
in switching cycles at 3 A
AC-11
Terminals
+/- screw (Pozidriv)
Rated operational voltage Ue
Rated operational current Ie
contact
Contacts
5 × 105
PZ 1
Conductor cross-sections
• Rigid
• Flexible, with end sleeve
Max.
Min.
Permissible ambient temperature
mm2
mm2
2 × 2.5
1 × 0.5
°C
-20 ... +45
Degree of protection
Acc. to IEC/EN 60529
IP20, with connected conductors
Safety class
Acc. to EN 61140/VDE 0140-1
II
Humidity class
Acc. to IEC 60068-2-30
F
■ Dimensional drawings
I201_10775a
45
90
L N
18
5
43
64
5TT3171
■ Circuit diagrams
If the line circuit relay does not respond to a load, it must be
connected with a 5TG8222 base load resistor. Devices in active
standby operation may impair the function of the line circuit
relay.
Typical circuit diagram
230 V AC
L
i
N
Electronic
PTC
I201_07036b
L1
N
Siemens · 2013
65
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 p.f. monitors
■ Overview
The p.f.monitors monitor the phase displacement between
current and voltage. Because the phase displacement angle
changes with the load of the motor, this measurement method is
ideal for the monitoring of asynchronous motors for underload
and no-load operation, independent of size. However, in some
cases, the p.f. barely changes if the load of the motor changes,
e.g. in the case of relatively minor load changes on large-scale
motors or single-phase split-pole motors or collector motors.
The p.f. monitor monitors single and three-phase asynchronous
motors up to approx. 5 A (without current transformer) for underload and no-load operation. This is phase-sequence-independent and increases plant availability. Typical applications are fan
monitoring in the case of V-belt breakage, pump monitoring in
the event of valve closure or dry runs. A current transformer is
used for higher rated currents.
If the lower p.f. value set at the p.f. monitor is violated for the duration of the set response delay, the output relay switches to the
alarm state and the red LED lights up. If the higher p.f. value is
violated, the output relay switches back without any significant
delay.
• Adjustable p.f. response value, from 0 to 0.97
• Current range up to 8 A
• LED display for operation and alarm
• Automatic resetting of alarm.
■ Technical specifications
5TT3472
IEC/EN 60255, VDE 0435
Standards
3 V AC
400
Uc
0.8 ... 1.1
Frequency range fn
Hz
45 ... 65
Rated power dissipation Pv
VA
Approx. 11
kV
<4
Rated control voltage Uc
With AC supply
Primary operating range
Rated impulse withstand voltage Uimp
Against contacts
For AC systems
Current measuring circuits
Current measuring range Imeas
Short-time load carrying capacity
For 2 s
For 0.5 s
A AC
0.4 ... 8
A
A
20
40
Current transformer, Class 3 or better
Secondary current
A
1 or 5
Setting range
Adjustable
p.f.
0 ... 0.97
Response delay
Adjustable
s
1 ... 100
Short-circuit strength
Fuse 4 A gL
A
4
Contacts
contact
• Rated operational voltage Ue
• Rated operational current Ie
Thermal current
AC-15 NO contacts
AC-15 NC contacts
AC-13 at 24 V DC
• Minimum contact load
1 CO
V AC
250
A
A
A
A
4
3
1
1
V; mA
10; 100
Connections
• Terminals
screw (Pozidriv)
• Conductor cross-sections
- Rigid
- Flexible, with end sleeve
Max.
Min.
Permissible ambient temperature
PZ 2
mm2
mm2
2 × 2.5
1 × 0.5
°C
-20 ... +60
Resistance to climate
Acc. to EN 60068-1
20/60/4
Degree of protection
Acc. to EN 60529
IP20, with connected conductors
■ Dimensional drawings
L3 L2
I201_11528b
45
90
L1 L1'
12
11 14
18
5
43
64
5TT3472
66
Siemens · 2013
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 p.f. monitors
■ Circuit diagrams
L1
L
L2
L3
L1
Load
N
M
3
L2
L3
L1 L1' L2 L3
L1 L1' L2 L3
I201_11525b
I201_11524b
11
12
11
L
L2
k
l
14
K
k
K
l
L
l
L
1V1
1W1
M
3
Connection of single-phase load
M
3
L3
2W1
11
12
High
Speed
k
L1 L1' L2 L3
I201_11527b
K
12
14
Connection of three-phase load
L1
Low
Speed
1U1
2U1
2V1
14
Connection of motors with separate windings
I201_11526b
L1 L1' L2 L3
11
12
14
Connection of three-phase load
with external current transformer,
whereby the winding direction of
the current transformer must be
taken into account.
■ More information
Function charts
Front view
L3 L2
U(L1/L2/L3)
L1 L1'
I(L1/L2)
LED green
E1
LED red
E2
11-14
11-12
ty
If the p.f. value set at the p.f. controller is undershot for the duration of
the set response delay, the output relay switches to the alarm state and
the red LED lights up. Contact 11–14 closes and the red LED lights up.
12
11
14
I201_11973a
I201_11523b
p.f.
Trip
LED green: Status display (U)
LED red: Underloading indicator (p.f. alarm)
E1: Response value
E2: Response delay ty
Siemens · 2013
67
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 motor protection relays
■ Overview
Thermistor motor protection relays monitor the thermistors
wound in motors. This helps to prevent thermal motor overloads,
e.g. due to high switching frequency, single-phasing, disabled
cooling or excessive ambient temperatures. Up to 6 thermistors
in series can be monitored. A conductor break in the sensor conductor will immediately trip the device. The device can also be
used for monitoring wound quick-break switches - e.g. bimetal
thermostats. This offers all-round motor protection.
• For the detection of
- Violation of upper temperature limits
- Wire breaks in sensor circuits
• 1 input for 1 to 6 thermistors
• With 2 LEDs green/red for ready-to-run and fault
• Response value: 3.2 to 3.8 k
• Release value: 1.5 to 1.8 k
• Max. cable length of sensor supply cable NYM 2 × 1.5
is 100 m
• Remote Reset: over A1/A2 (NC contact) or
over X1/X2 (NO contact)
LED displays:
• Green LED: lights up when operational voltage is applied
• Red LED: lights up in the event of overtemperatures or
an interruption in the sensor circuit.
■ Technical specifications
5TT3431
5TT3432
IEC 60255; IEC 61810
Standards
Rated control voltage Uc
V AC
230
Primary operating range
×Uc
0.9 ... 1.1
Rated frequency
Hz
50/60
Response value
k
3.2 ... 3.8
Release value
k
1.5 ... 1.8
Minimum contact load
V; mA
10; 100
Rated insulation voltage Ui
Between coil/contact
kV
4
Rated impulse withstand voltage Uimp
Actuator/contact
kV
> 2.5
Contacts
contact (AC-11)
A
3
• Rated operational voltage Ue
V AC
230
• Rated operational current Ie
A
mm
5
4
Actuator/contact
Connections
• Terminals
screw (Pozidriv)
• Conductor cross-sections
- Rigid
- Flexible, with end sleeve
Max.
Min.
Permissible ambient temperature
Acc. to EN 60068-1
Resistance to climate
■ Dimensional drawings
5TT343 motor protection relays
A1
P1 P2
A1
P1 P2
A1
X1 X2
12
22
12
22
14 11 24 21
14 11 24 21
36
36
I201_11530a
45
90
A2
5
43
64
5TT3431
5TT3432
68
Siemens · 2013
PZ 1
mm2
mm2
2 x 2.5
1 x 0.5
°C
-20 ... +60
20/60/4
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
5TT3 motor protection relays
■ Circuit diagrams
Graphic symbols
A1 A2 14 12 24 22
P1 P2
11
A1 A2
21
14 12 24 22
P1 P2 X1 X2
5TT3431
11
21
5TT3432
Typical circuit for 5TT3 431, 5TT3 432
Reset
pushbutton
X1
L1
A1
X2
230 V AC
N
UH
I201_07280e
A2
14
11
12
24
21
22
I201_07041c
t
R
3,2 k
1,8 k
P1/P2
TEST/RESET
pushbutton
(X1/X2)
TEST/ Overtemperature/ Voltage
RESET sensor breakage failure RESET
1...6 v +
t
TEST/
RESET
M
11-14
5TT3431: 11-12
11-14
5TT3432: 11-12
If one of the thermistors (possible for up to 6) reaches the
response temperature, the device switches.
5TT3431 (without terminals X1/X2 and without Reset button)
switches back on after cooling and after the value falls below
that permanently set for the hysteresis. To switch on before this
time, briefly disconnect the power supply.
5TT3432 stores the fault and remains switched off until the Reset
button is pressed.
Siemens · 2013
69
© Siemens AG 2014
Monitoring Devices
Monitoring Devices for Plants and Equipment
Notes
70
Siemens · 2013
© Siemens AG 2014
© Siemens AG 2014
Siemens AG
Infrastructure & Cities Sector
Low and Medium Voltage Division
Low Voltage & Products
Postfach 10 09 53
93009 REGENSBURG
GERMANY
www.siemens.com/lowvoltage
Subject to change without prior notice
PDF (3ZW1012-5SV80-0AC1)
MP.R3.LP.0000.00.3.79
PH 0314 70 En
Produced in Germany
© Siemens AG 2014
The information provided in this brochure contains merely general
descriptions or characteristics of performance which in case of actual
use do not always apply as described or which may change as a result
of further development of the products. An obligation to provide the
respective characteristics shall only exist if expressly agreed in the
terms of contract. Availability and technical specifications are subject
to change without notice.
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