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 ).
When an Under voltage Release accessory causes the
breaker to trip, the contacts of the Bell Alarm–Alarm
Only also change state. (The factory switch setting is
disabled
).
When a protection trip (long-time, short-time,
instantaneous, ground-fault, or protective-relay)
occurs, the contacts of the Bell Alarm–Alarm Only also
change state.(The factory switch setting is
enabled .
)
When a Shunt Trip accessory causes the breaker to
trip, the contacts of the Bell Alarm with Lockout also
change state. (The factory switch setting is
disabled.
)
When an Under voltage Release accessory causes the
breaker to trip, the contacts of the Bell Alarm with
Lockout also change state. (The factory switch setting
is
disabled.
)
When a protection trip (long-time, short-time,
instantaneous, ground-fault, or protective-relay)
occurs, the contacts of the Bell Alarm with
Lockout also change state. (The factory switch
setting is
enabled.
)
Procedure for Changing Switch Settings
Change the accessory switch settings with the following
procedure:
Test Procedure
Use the following procedure to test the UVR for proper
operation.
Open the breaker.
Turn off the power to the UVR.
Try to manually close the breaker; the breaker should not
close.
Apply at least 80% of the rated voltage specified on the
UVR name plate to the UVR control inputs.
Try to close the breaker; it should close as normal.
If a MicroVersaTrip Plus or MicroVersaTrip PM Trip Unit is
installed, check that the Trip Unit display is active
(powered).
With the breaker closed, reduce the UVR control voltage to
35–60% of the rated voltage; the breaker should trip within
0.5 second.
If a Bell Alarm–Alarm Only or Bell Alarm with Lockout is
present, ensure that they activate (or do not activate) as
selected by the MicroVersaTrip Plus or MicroVersaTrip PM
Trip Unit DIP switches.
AVERTISSEMENT:
Avant de commencer cette procédure,
mettre le disjoncteur en position OFF, le déconnecter de
toute tension d’alimentation, et désarmer les ressorts de
fermeture.
Loosen the four #8-32 screws on the breaker trim-plate
assembly and remove the trim plate.
Loosen the four #10-32 screws at the corner of
the breaker cover. Remove the cover from the breaker
face.
Pull the Trip Unit locking lever to the right, then hold the
Trip Unit near the battery cover and lift it straight out of
the breaker.
Refer to Figure 4 and Table 3 to determine the switches
to be changed.
Push in the appropriate “Enable” or “Disable” side of the
switch.
Confirm all switch settings before reinstalling the Trip
Unit in the breaker.
Pull the Trip Unit locking lever to the right. While holding
the lever, carefully align the connector on the rear of the
Trip Unit with the connector in the breaker. Press down
on the Trip Unit, while holding it near the battery cover.
When the Trip Unit is fully seated, slide the locking lever
back to the left.
Reinstall the breaker top cover and tighten the four #10-
32 screws to 32 in-lb.
Replace the trim plate and tighten the four #8-32 screws
to 20 in-lb.
Verify that the switch settings are correct by inducing
breaker trips from the UVR and Shunt Trip or Shunt Trip
with Lockout (if present) and checking the responses of
the Bell Alarm–Alarm Only and Bell Alarm with
Lockout accessories.
WARNING:
Before beginning this procedure, turn the
breaker OFF, disconnect it from all voltage sources, and
discharge the closing springs.
Switch
Factory
Setting
Function
1
Disabled
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 withLockout
Disabled
UVR trip activates Bell
Alarm with Lockout
Enabled
Protection trip activates
Bell Alarm with Lockout
3
—
Table 3. Accessory switch settings, including factory defaults.
Description of Switch Settings
Following are descriptions of the effects of each accessory
switch when it is
enabled:
5
6
1.
2.
3.
4.
5.
6.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
1.
2.
3.
4.
5.
6.
7.
8.
Shunt trip activates
Bell Alarm–Alarm Only
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