GE GSTG024D User manual

Introduction
Shunt Trip (Extended Range):
A device designed to switch the Power Circuit
Breaker OFF remotely. When energized a Shunt
Release instantaneously activates the circuit
breaker mechanism ensuring a rapid
disconnection of the main contacts.
Two Shunt trips can be mounted in each Power
Circuit Breaker. The devices are available as
factory mounted components or as field
mountable devices. It is an easy-to-fit, clip-on unit,
with simple plug-in connectors to the Secondary
Disconnect Block.
Table 1. Catalog Numbers and Ratings
Catalog
No.
DC
Voltage
AC
Voltage
Rating*
GSTG024D
24V
Continuous
GSST024D
24V
Momentary
GSTG048
48V
48V
Continuous
GSTG072
70-72V
Continuous
GSTG120
110-125V
120-125V
Continuous
GSST120
110-130V
110-130V
Momentary
GSTG208A
208V
Continuous
GSTG240
220V
240V
Continuous
GSST240
220-240V
220-240V
Momentary
GSTG250D
250V
Continuous
* Momentary Rated shunt trip requires wiring one or more NO
(Normally Open) breaker aux contact(s) in series with the accessory to
avoid coil damage.
Use the following procedure to install the Shunt
Trip accessory into the circuit breaker.
1. Verify that the rating on the Shunt Trip
Mechanism identification plate matches the
voltage rating required for the application, as listed
in Table 1.
2. Turn the breaker off and discharge the closing
springs by depressing the OFF and ON buttons in
the sequence OFF-ON-OFF. Verify that the breaker
OFF-ON indicator shows OFF on a green
background and that the charge indicator shows
DISCHARGE on a white background. If installing in
a draw-out type breaker remove breaker from
adaptor (cassette) before continuing.
3. Loosen the 6 screws on front cover (fascia) using
a posidrive screw driver as shown in Fig 1.B
Rotate the charging handle down and slide the
front cover over the handle to remove the front
cover as shown in Fig. 1.C .
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Figure 1. (A) Front Cover (B) Screw Removal (C) Handle
Rotation
4. This accessory is mounted on the mechanism
top plate at 1st or 4th location as shown in
Figure 2.
Figure 2.
5. Tilt the coil forward and engage the front
hooks into the mechanism top support plate as
shown in Fig. 3. Tilt the device backwards until
the
rear hooks engage in the slots on the
mechanism top support plate as shown in Fig. 4.
Figure 3. Shunt Trip Inserting
Figure 4. Shunt Trip Assembly
6. After installing the shunt release on the
mechanism top plate, connect the input wire
assembly plug to the A5/A6 (if installed in the first
location) or A12/A13 (if installed in the fourth
location) locations marked on the secondary
disconnect as shown in Fig. 5.
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Figure 5. Wiring.
7. Ensure that the plug in connection is firm and
that the plug is inserted into the correct
terminals.
8. To reinstall the breaker cover rotate the
charging handle down and slide the front cover
over the handle to assemble the front cover to
the housing as shown in Figure 6.
9. Ensure the fascia is aligned properly with the
trip unit and the pad lock features of the breaker.
Figure 6.
10. Fasten the 6 mounting screws of the fascia
with the housing using a Pozidrive screwdriver.
Apply torque of 6Nm (4.42 ft-lbs).
11. When installing a GSST* shunt trip device you
must wire one or more Normally Open (NO)
breaker auxiliary contact(s) in series with the
shunt trip accessory coil. In some cases multiple
contacts in series are required to ensure reliable
performance.
Application Voltage
Required Aux. Contacts
All AC Ratings, 24VDC
One
120VDC
Two
240VDC
Three
GSTG* devices do not require an auxiliary
contact.
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Reference:
GSTG type Continuously Rated Shunt Trip Connection Scheme
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Reference:
GSST type Shunt Trip Connection Scheme with mandatory Breaker Aux contact wiring and optional coil
continuity detection circuit. The number of auxiliary contacts wired in series varies by voltage rating.
Application Voltage
Required Aux. Contacts
All AC Ratings, 24VDC
One
120VDC
Two
240VDC
Three
GE
41 Woodford Ave, Plainville, CT 06062
www.geindustrial.com
© 2019 General Electric Company
DEH-41411 R2 (05/19)
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These instructions do not purport to cover all details or variations in equipment nor, to provide contingency to be met in connection
with installation, operation, or maintenance. Should further information be desired, or should particular problems arise which are not
covered sufficiently for the purchaser’s purposes, the matter should be referred to GE.