Possible causes and troubleshooting of manually operated circuit breakers that cannot be closed

1、 If a manually operated circuit breaker fails to close, it may be caused by the following reasons:

1. The undervoltage release has no voltage or the coil is damaged

2. The energy storage spring is deformed and the closing force is reduced

3. The reaction of the release spring is too large

4. The mechanism cannot be reset and re buckled

The corresponding elimination methods can include:

Apply voltage or replace the coil after checking the circuit

Replace the energy storage spring

3. Adjust the elastic force or replace the spring

Adjust the trip surface to the specified value