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DORMAN
SMITH
LOADLINE YB3 FRAME
Handling Precautions
CAUTION
Safety Notices
WARNING
Be sure to read these instructions and other documents accompanying this
product. Please familiarise yourself with handling of this product, safety
information, and all other precautions before mounting, using, servicing or
inspection. In these instructions, safety notices are divided into "Warning"
and "Caution" according to the hazard level.
Instruction Manual for
Moulded Case Circuit
Breakers
Electrical work should only be undertaken by suitably qualified
persons.
Do not place the product an an area that is subject to high temperature,
high humidity, excessive dust air, corrosive gas, strong vibration and
shock, or other unusual conditions. Mounting in such areas could cause
a fire or malfunction.
WARNING
A warning notice with this symbol indicates that
neglecting the suggested procedure or practice could result in lethal or
serious personal injury.
Fixed Type
YB3***TF
Adjustable Thermal Magnetic Type
YB3***T
Please retain this manual for future reference.The Manufacturer assumes no
responsibility for damages resulting from non-application or incorrect application of the
instructions provided herein.
Never touch terminals. Otherwise, electric shock may result
CAUTION
When the breaker trips open automatically, remove the cause, then
return the handle to the ON position. Should a fault be interrupted,
the breaker must be inspected, otherwise, a fire may result.
Be careful to prevent foreign objects (debris, concrete, iron powder etc)
and rainwater from entering product. These materials inside the product
could cause a fire or malfunction.
CAUTION
A caution notice with this symbol indicates that
neglecting the suggested procedure or practice could result in moderate
or slight personal injury and/or property damage.
Prior to commencing any work on the product, open an upstream circuit
breaker or isolator to ensure that no voltage is applied to the product
otherwise electrical shock may result.
Note that failing to observe CAUTION notices could result in serious
results in some cases. Because safety notices contain important information,
be sure to read and observe them.
For 4 pole breakers, be sure to connect a neutral conductor to the
N-phase pole, otherwise an overcurrent may hinder the product from
tripping thus resulting in a fire.
Maintenance Precautions
CAUTION
Service and/or inspection of the product must be done by persons
having expert knowledge.
Before servicing or inspecting the product, open an upstream circuit
breaker or the like to isolate all sources of power. Otherwise, electric
shock may result.
When connecting cable or busbar to the product, tighten terminal screws
to the torque specified in this manual,
otherwise, a fire could result.
Mounting Precautions
For detailed mounting dimensions, refer to either the Loadline or
System Loadbank catalogues.
Regularly check that the breaker terminal screws are tightened to
torque values shown within this manual, failure to do so may result
in fire.
After conductor connection, do not
apply excessive force to the terminals.
Otherwise, a fire may result.
Other Precautions
For front-connected breakers, insulate all bare conductors of the line side
until the breaker end. If interpole barriers are packed, be sure to use the
barriers; moreover, insulate all bare conductors by insulting tape or the
like so that the tape overlaps with the barriers. Insufficient insulation may
result in short-circuit.
Dorman Smith Switchgear Limited
8 Swinbourne Drive
Springwood Industrial Estate
Braintree Essex
CM7 2YG UK
Tel: +44 (0) 844 225 1063
Fax: +44 (0) 844 225 1064
A49914
Packaged Items/Assembly Tools
Do not carry this product by accessory leads, as this may cause damage
to the product.
Unauthorised opening of the breaker cover will invalidate product warranty.
When installing the product, use wires or conductors, the cross sectional
areas of which accommodate the rated current of the product. Using wires
or conductors with inadequate cross sectional areas may cause false
tripping and overheat.
Do not block the arc gas vents of the product to ensure adequate arc space.
Blocking these vents could result in failure of circuit interruption.
Operating Instructions
Fitting Internal Accessories
Alarm Switch
YBAL
Instr
uctio
Instruction Manual 1
(This document)
n
Auxiliary Switch
YBAUX1
Breaker
Interpole Barrier
(Only FC)
Shunt Trip
TRIPPED
Undervoltage Trip
YBST**
3P: 2
4P: 3
YBUVR**
Symbols of Accessories
Ring Mark
Auxiliary Switch
Handle
Type
YB3
Trip Button
ON
Connections/Poles
Mounting screw
Qty
Connecting screw
Front
Connection
3P
4P
2
4
M4 55
3P
4P
6
8
M8 18
Rear
Connection
3P
4P
2
4
M4 55
3P
4P
6
8
M8 25
Plug-in
Connection
3P
4P
2
4
M4 65
3P
4P
6
8
M8
Dummy unit
OFF
b contact a contact b contact
11/AXc-12/AXb
21/AXc-22/AXb 91 /ALc - 91 /ALc 31/AXc-32/AXb 94 /ALa 92 /ALb
41/AXc-42/AXb
Shunt Trip
power source
C1-C2
Combination
Undervoltage Trip
power source
D1-D2
Pull Out Leads on Load Side
Removal
4 pole
RESET
Form the cable
Operation
17
10 mm
Symbols of Accessories
3 pole
Qty
a contact
11/AXc-14/AXa
21/AXc-24/AXa
31/AXc-34/AXa
41/AXc-44/AXa
Alarm Switch
5
6
(OFF)
(ON)
TRIP
(ON)
(OFF)
(OFF)
Operation effort
53N
57N
91N
In case of fiting one (or two) auxiliary switch,
fit in an order from a left side-slot.
After fitting, verify the function of the Accessory.
AX
AL
SH
UV
V
Adjustable Thermal Magnetic Type
Solderless Terminals Mounting Procedure for FC
Conductor Connection Procedure for RC/F.P (where applicable)
Breaker Mounting
Procedure for FC / RC
13
L
N
Solderless Terminal
M
YB3CC*P
L
5
l i( xl n )
7
11
9
l R( xl n )
1
0.8
0.63
OFF
End cap
Flat Bar Stud
YB3RT*P
L
A
M
M4 55 mm
1.3 1.7N m
N
T2FW25LS
23mm
120mm2
6 19N m
M6 20mm
6.9 9.3N m
O
P
Q
M6 18 mm
7.8 11.8N m
9mm
M8 25 mm
11.8 18.6N m
R
R2
10
Handle Lock Mounting Procedure
Conductor Connection Procedure for FC
J
Handle Lock
YBDL1
K
Flat Bar
YB3XT*P
YB3XTS*P
J
C
D
E
F
G
H
I
Interpole Barrier
22mm
11mm
8.4mm
25mm
11mm
7mm
9mm
Mounting Procedure
J
K
M8 18
7.8 12.7N m
17 M10 25
22.5 37.2N m
6
Handle lock can be fitted in any position of
I (ON) and O (OFF).
Insulate all bare conductors of the line side until the breaker end.
Time/Current Characteristic Curves
Terminal Cover Mounting Procedure
In
0.63 0.8 1
/R Adjustment Range
Terminal Cover Lock
/R Adjustment Range
/ i Adjustment Range
/ i Adjustment Range
Connection
YB3TB
Front Connected
(FC)
Rear/Plug-in Connected
(RC / PM)
When removing, remove the items in
reverse order of mounting.
Terminal Cover
YB3TS*P
YB3TS*PS
YB3TC*P
When removing, remove the items in
reverse order of mounting.
In
T
T
0.63 0.8 1
Interpole Barrier
When removing, remove the items in reverse order of mounting.
6 8 10
13 xI n
( I n =100, 125, 160, 200A)
I
5 7 9 11 xI n
( I n =250A)
I