Use the following procedure to install the UVR accessory into
the UVR slot in the accessory compartment of the circuit
breaker:
1. Open the hinged door over the accessory compartment and
Trip Unit.
2. To remove an existing accessory module, loosen the
accessory locking screw and pull the module out with the
Rating Plug Removal Tool (catalog number TRTOOL).
3. Insert the UVR accessory into th e proper slot, as
illustrated in Figure 3. The UVR accessory is keyed for
the correct slot in the accessory compartment. If the
accessory cannot be fully seated in the compartment, check
that the compartment position is correct.
Figure 3. Inserting the Undervoltage Release into the accessory
compartment.
4. Tighten the locking screw on the front of the accessory
until it is snug (torque of 9 in-lb.)
CAUTION: Overtightening the locking screw may damage or
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 or
MicroVersaTrip PM Trip Unit, the UVR accessory can be
configured to activate installed Bell Alarm–Alarm Only or
Bell Alarm with Lockout accessories when a UVR trip
occurs, with the procedure described in the Accessory
Configuration section.
6. Connect the control wiring for the UVR to terminals 29
and 30 at the terminal block on the right side of the
breaker.
7. Te st the UVR to ensure proper operation, according to the
procedures below.
8. Reconnect power to the circuit breaker and any other
accessories.
9. 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 2, can not be changed.
The UVR accessory can be configured to activate the Bell
Alarm–Alarm Only or Bell Alarm with Lockout accessories if a
UVR 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 read DIP switches and their functions.
Table 2 lists the switch functions and the factory settings for
each.
Figure 4. Accessory switch on the rear of the MicroVersaTrip Plus™ or
MicroVersaTrip PM™ Trip Unit, showing the factory settings (solid
part indicates that the switch is pushed in on that side).
Switch
Factory
Setting Function
1 Disabled
Shunt trip activates Bell Alarm–Alarm
Only
2 Disabled
UVR trip activates Bell Alarm–Alarm
Only
3 Enabled
Protection trip activates Bell
Alarm–Alarm Only
4 Disabled
Shunt trip activates Bell Alarm with
Lockout
5 Disabled
UVR trip activates Bell Alarm with
Lockout
6 Enabled
Protection trip activates Bell Alarm
with Lockout
Table 2. Accessory switch settings, including the factory defaults.
Push
in
this
side
to
disablex
II
II
P
CD
cn
-
p
^
/
co
ro
—
1
Rear
of
Trip
Unit
Push
in
this
side
to
enable
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