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Internal A ccessories
Shunt Trip
CAUTION: Do not attempt to install an accessory with
the breaker "Closed" or "Charged". Make certain
breaker is "Open" and "Discharged" as shown above.
Personal injury or mechanical damage may occur.
Preliminary installation procedures are outlined on
pages 35-36.
Shunt Trip Kit
Shunt Trip
The shunt trip provides the capability to open the SB
breaker from a remote location. Shunt trips are available
to operate with a source power of 1 20, 240, or 480V ac, 1 2,
24, 48, or 1 25V de. The shunt trip accessory kit consists
of a trip solenoid to open the breaker, a clearing switch
to remove voltage from the solenoid coil upon the
breakers opening and mounting hardware.
To install the shunt trip, first remove the breaker front
cover and trip u nit, if previously i nstal led (see page 36) .
Pinching wires is not a problem when removing the co
Control Power
+
External Breaker Connections
Shunt Trip Schematic Diagram
1 .) Align threaded mounting holes in shunt trip with holes in
reset mechanism.
2.) Maneuver the switch to the bottom side of the switch
mounting bracket. Make sure the switch actuator is resting
at the end of the upper groove in the reset arm.
3. ) Route the wires across the mechanism between the shield
and mid-barrier. From
terminal block or secondary disconnect using terminals
LT6-LT8.
4.) Replace trip unit and breaker front cover, being careful not
to pinch wire leads routed to secondary disconnects or
terminal block.
Shunt Trip Ratings
Catalog Number
SB4ST1 2
SB4ST24
SB4ST48
SB4ST1 25
r.
SB4ST120
SB4ST240
ve
SB4ST480
Supplied by
Customer
-
r - - - -
<LT6> Coil+
,
'
'
, _ - - - - .
<LTB> Coil - (Common)
Supplied by
Customer
r - - - - -
<LT7> Remote Open-Closed Indication
,
' - - - - - ·
Note Switch shown with breaker main contacts open.
side of the breaker, connect to
left
In-Rush Current (Amperes)
2.50
1 .75
1 . 1 0
1 02
.63
.41
. 3 5
Type
Cleari ng
"B"
Switch
N C <ST>
COM
N O
Internal Breaker Connections
de
de
Coil Voltage
1 2V
de
24V
de
48V
de
1 25V
1 20V
de
240V de
480V
Shunt Tri p
Co1l
53
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