IB 6.2.11.1-1C
Page 13
ABB
Electrically Operated (EO) Models:
1. Manually reset the Automatic Trip Indicator if it
protrudes approximately 1/2”. Push to reset. (Note:
on breakers with an Undervoltage Trip Device
(UVD) installed, control power must be present to
reset the Trip Indicator.)
2. Turn the motor disconnect switch to the ON
position and the closing springs will automatically
charge, if control power is available.
3. Close the circuit breaker by lifting the manual
close lever, then trip with the manual trip push
button. The closing springs should automatically
recharge after trip. On models with local electric
close and trip, these push buttons may be used to
operate the circuit breaker. NOTE: Some
switchgear schemes allow the local electrical close
and trip push buttons to operate only in the
CONNECTED positions.
4. Close and trip circuit breaker by means of remote
control switch.
5. Check each auxiliary device for proper operation.
6. Close the circuit breaker and check that the
shutter cannot be lifted to allow insertion of the
racking crank. This demonstrates that the circuit
breaker could not be racked out while closed.
Manual Operation of Electrically Operated Models:
Electrically operated circuit breakers may be
charged manually by a removable maintenance
handle for bench tests or emergency operation.
Position the maintenance handle hooked section in
the long slot on the pawl carrier (Refer to Figure 4).
The small tab on the maintenance handle will fit the
small hole of the pawl carrier. Using a pumping
motion, rotate the pawl carrier until the ratchet
wheel no longer rotates. At this point, the spring
charged indicator will indicate SPRINGS
CHARGED. The circuit breaker can be closed
manually with the manual close lever. (Note:
Occasionally the motor crank arm will stop in a
position that will not allow manual spring charging.
When this happens, the motor crank arm must be
rotated manually by using a screw driver to rotate
the crank arm sufficiently so that the springs may
then be manually charged with the maintenance
handle.)
Manually Operated (MO) Models:
1. Manually reset the Automatic Trip Indicator if it
protrudes approximately 1/2". Push to reset.
2. Close the circuit breaker by pulling down on the T
handle.
3. Trip by manual TRIP button.
4. Check each auxiliary device for proper operation.
5. Close the circuit breaker and check that the
shutter cannot be lifted to allow insertion of the
racking crank. This demonstrates that the circuit
breaker could not be racked out while closed.
After initial testing, the circuit breaker can be racked to
the CONNECTED position to be put into service.
Figure 4
- Manual Charging of EO Breaker
(Continued from page 10)
WARNING WARNING WARNING WARNING
DO NOT REMOVE THE INTERFERENCE
BLOCKING IN AN EFFORT TO ALLOW CIRCUIT
BREAKER RACKING. RISK TO PERSONNEL AND
SERIOUS DAMAGE TO THE CIRCUIT BREAKER
AND CUBICLE CAN RESULT.
