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.

Voltage

Rating*

GSTG024D

24V

Continuous

GSST024D

24V

Momentary

GSTG048

48V

Continuous

GSTG072

70-72V

Continuous

GSTG120

110-125V

120-125V

Continuous

GSST120

110-130V

Momentary

GSTG208A

208V

Continuous

GSTG240

220V

240V

Continuous

GSST240

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 .

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.

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.

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.

Reference:

GSTG type Continuously Rated Shunt Trip Connection Scheme

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

41 Woodford Ave, Plainville, CT 06062

www.geindustrial.com

DEH-41411 R2 (05/19)

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.

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