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Figure 2. Accessory compartment on front of circuit breaker, with
Shunt Trip slot indicated.
Use the following procedure to install the Shunt Trip accessory
into the Shunt Trip slot of the accessory compartment:
1. Open the hinged door over the accessory compartment and
Trip Unit.
2. To remove an existing accessory, loosen the accessory
locking screw and pull the accessory out with the Rating
Plug Removal Tool (catalog number TRTOOL).
3. Insert the Shunt Trip accessory into the proper slot, as
illustrated in Figure 3. The Shunt Trip accessory is keyed
for the correct slot in the accessory compartment. If t h e
accessory cannot be fully seated in the compartment, check
that the compartment position is correct.
Figure 3. Inserting a Shunt Trip into the accessory compartment.
4. Tighten the locking screw on the front of the accessory
until it is snug (9 in-lb).
CAUTION: Overtightening the locking screw may damage o r
distort the case of the accessory.
ATTENTION: Le serrage excessif de la vis de verrouillage
peut déformer le boîtier d'accessoire.
5. If the breaker is equipped with a MicroVersaTrip Plus o r
MicroVersaTrip PM Trip Unit, the Shunt Trip accessory
can be congifured to activate installed Bell Alarm–Alarm
Only or Bell Alarm with Lockout accessories when a shunt
trip occurs, with the procedure described in the Accessory
Configuration section.
6. Mount the supplied step-down transformer near the circuit
breaker.
7. Connect the control wiring for either Shunt Trip to the
primary side of the transformer, marked as the H
numbered terminals. Table 3 lists the correct transformer
primary taps.
Courtesy of NationalSwitchgear.com
8. Connect the secondary side of the transformer, marked as
the X numbered terminals, to terminals 31 and 32 of the
terminal block on the right side of the breaker. Table 3
lists the correct transformer secondary taps.
WARNING: 480 Vac and 600 Vac Shunt Trip accessories
must be used with the supplied step-down transformer.
AVERTISSEMENT: Les modules de déclenchement shunt 480
Vac et 600 Vac doivent être utilisés avec le transformateur
abaisseur de tension qui est fourni.
Catalog Number/
Control Voltage
Connections
9T58K0042
480 V
9T58K0062
600 V
➀ A jumper must be placed from H2 to H3.
Table 3. Primary and secondary connections for step-down
transformers.
9. Test the Shunt Trip to ensure proper operation, according
to the procedures below.
10. Reconnect power to the circuit breaker and any other
accessories.
11. Close and lock or seal the door over the accessory
compartment and Trip Unit to prevent unauthorized
changes to Trip Unit settings and to keep contaminants
out of empty accessory slots.
Accessory Configuration
This section only applies if Bell Alarm–Alarm Only or Bell
Alarm with Lockout accessories are installed in the breaker,
along with a MicroVersaTrip Plus or MicroVersaTrip PM Trip
Unit. If the breaker is equipped with a Power+ Trip Unit, the
factory default settings, listed in Table 4, can not be changed.
The Shunt Trip accessory can be configured to activate the Bell
Alarm–Alarm Only or Bell Alarm with Lockout accessories if a
shunt trip occurs. The configuration can be changed by
removing the Trip Unit from the breaker, setting the DIP
switches on the rear of the Trip Unit, and reinstalling the Trip
Unit. Figure 4 illustrates the Trip Unit rear DIP switches and
their functions. Table 4 lists the switch functions and the
factory settings for each.
Description of Switch Settings
Following are descriptions of the effects of each accessory switch
when it is enabled.
1. When a Shunt Trip accessory causes the breaker to trip,
the contacts of the Bell Alarm–Alarm Only also change
state. (The factory switch setting is disabled.)
Primary
Secondary
Connections
H1, H4➀
X1, X2
H1, H4
X1, X3
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