GEH-62840
Power Break® II Circuit Breaker
Accessories
Shunt Trip and Shunt Trip with Lockout
Introduction
The Shunt Trip and Shunt Trip with Lockout
accessories, shown in Figures 1 and 2, can be installed
in 800-4000 ampere frame Power Break® II circuit
breakers. These accessories allow the breaker to be
tripped electrically from a remote location.
In addition to providing a trip signal to the breaker,
the Shunt Trip accessories can be set up to interact with
other Power Break II accessories, when used with a
MicroVersaTrip Plusn1 or MicroVersaTrip PMn1 Trip
Unit. DIP switches on the rear of the breaker Trip
Unit can configure the Shunt Trip accessories to
activate a Bell Alarm-Alarm Only accessory or a Bell
Alarm with Lockout accessory when a shunt trip
occurs. The Accessory Configuration section below
describes how this can be done. If the breaker i s
equipped with a Power+n1 Trip Unit, it is configured
so that only protection trips will activate a Bell Alarm
Alarm Only or Bell Alarm with Lockout.
Figure
1.
Shunt Trip.
Figure
2
Shunt Trip with Lockout.
The catalog numbers for various voltage applications
are listed in Table 1 for the Shunt Trip and in Table 2
for the Shunt Trip with Lockout.
Catalog
Voltage
Peak Inrush
Nominal RMS
Number
Rating
CD
Current, A@
Current, mA
SPST012
12
Vdc
3.0
200
SPST024
24
Vac
1.5
140
24
Vdc
SPST048
48
Vac
1.5
110
48
Vdc
SPST120
120
Vac
1.5
85
125
Vdc
SPST208
208
Vac
1.5
50
SPST240
240
Vac
1.5
40
250
Vdc
CD 24-240
Vac devices are rated for
50/60 Hz.
<2l
Peak inrush current is present for
2-6
ms after activation. This
number is provided so that fuses and supplies can be chosen
appropriately.
Table
1.
Catalog numbers and voltages for the Shunt Trip.
Catalog
Voltage
Peak Inrush
Nominal RMS
Number
Rating
CD
Current, A
<2l
Current, mA
SPSTL012
12
Vdc
19
300
SPSTL024
24
Vac
15
300
24
Vdc
SPSTL048
48
Vac
7.5
200
48
Vdc
SPSTL120
120
Vac
3.0
80
125
Vdc
SPSTL208
208
Vac
1.9
60
SPSTL240
240
Vac
1.5
45
250
Vdc
Table
2
Catalog numbers and voltages for the Shunt Trip with Lockout.
Operation
Apply control voltage to terminals 31 and 32 of the
terminal strip on the right side of the breaker to trip
the circuit breaker. The Shunt Trip will cause the
circuit breaker to trip when the control voltage i s
greater than 75% o f the rated de voltage or 55% of the
rated ac voltage. Control power to the Shunt Trip must
be removed before the breaker can be closed. Control
power to the Shunt Trip with Lockout must be removed
for a minimum of 0.25 second before the breaker can
be closed.
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