Factory
Switch
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 withLockout
6
Enabled
Protection trip activates Bell Alarm with
Lockout
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 i s enabled.)
Procedure for Changing Switch Settings
Change the accessory switch settings with the following
procedure:
WARNING:
Before beginning this procedure, turn the
breaker off, disconnect it from all voltage sources, and
discharge the closing springs.
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.
2
.
3
.
4
.
5
.
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 5 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 Shunt Trip and Undervoltage
Release (if present) and checking the responses of the
Bell Alarm-Alarm Only and Bell Alarm with Lockout
accessories.
ƈƓơƢƄƠƝƑƓƒƣƠƓ
Test the Shunt Trip for proper operation with the following
procedure.
Turn off the power to the Shunt Trip.
Close the breaker contacts.
Apply at least 55% of the rated ac voltage or at
least 75% of the rated de voltage to the Shunt
Trip; the breaker should trip immediately.
If a Bell Alarm-Alarm Only or Bell Alarm with Lockout is
present, ensure that it activates (or does not activate)
as selected by the MicroVersaTrip Plus or
MicroVersaTrip PM Trip Unit.
If a Shunt Trip with Lockout has been installed, continue
with the following steps:
After the breaker has tripped and with the power still
applied to the Shunt Trip with Lockout, attempt
to close the breaker. The breaker should not close
nor attempt to close.
If a MicroVersaTrip Plus or MicroVersaTrip PM Trip Unit
is installed, check that the Trip Unit display is
active (powered).
Remove power from the Shunt Trip with Lockout.
Attempt to close the breaker; it should close as
normal.
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.
1.
2.
3.
4.
5.
6.
5.
6.
7.
8.
1.
2.
.
4.
6
.
7
.
8
.
9
.
10
.
Loosen the four #8-32 screws on the breaker trim-
plate assembly and remove the trim plate.
1
.
