Opening, Closing, Resetting and Testing a Circuit Breaker with a Side Rotary Handle
Opening and Closing with the Side Rotary Handle
Open and close a circuit breaker with a side rotary handle in the same way as for a circuit breaker with an extended rotary handle (see Opening and Closing with the Front Extended Handle).
Resetting with the Side Rotary Handle After a Trip
After a trip, reset a circuit breaker with a side rotary handle in the same way as for a circuit breaker with an extended rotary handle (see Resetting with the Front Extended Handle After a Trip).
Testing the Trip Mechanism with a Side Rotary Handle
 CAUTION |
|---|
|
HAZARD OF NUISANCE TRIPPING
Circuit breaker tests must only be done by qualified electrical
personnel.
Failure to follow these instructions can result in injury or equipment damage.
|
When testing the trip mechanism, take precautions against:
-
Disrupting operations
-
Activating inappropriate alarms
-
Triggering unwanted actions
For example, tripping the circuit breaker with the push-to-trip button can lead to inappropriate fault indications or corrective actions (such as switching to an alternate power source).
There is no push-to-trip button on the door of a circuit breaker with a side rotary handle. To check the trip mechanism, the door must first be opened.
Follow these steps to test the trip mechanism.
|
Step |
Action |
Position |
|
|---|---|---|---|
|
1 |
With the circuit breaker in the O (OFF) position, open the enclosure door. O (OFF) |
O (OFF) |
|
|
2 |
Turn the circuit breaker from the O (OFF) position to the I (ON) position. The circuit breaker is ready for the test. |
I (ON) |
|
|
3 |
Press the push-to-trip button. The circuit breaker trips. |
Trip |
|
|
4 |
Turn the circuit breaker from the Trip position to the O (OFF) position. The circuit breaker is open. |
O (OFF) |
|
|
5 |
Close the door. |
— |
|