The energy storage coil of the circuit breaker is burned out

Why does a loose coil burn when a circuit breaker is opened?

Loose coil causes the electromagnet to move when the circuit breaker is opened, which causes the iron core to jam, causing the coil to burn; or because the iron core has a short movable stroke, when the opening circuit power is turned on, the iron core does not open the tripping mechanism to make the coil energize for a long time burn. 2.

What causes open circuit coil burn of molded case circuit breaker?

I. cause analysis of open circuit coil burn of molded case circuit breaker 1. Mechanical failure of open electromagnet.

What happens if a circuit breaker is closed?

The closing contactor is faulty. When the circuit breaker is closed, because the closing current is relatively large, the control circuit cannot directly control the closing coil, and can only indirectly connect the closing coil through the closing contactor.

Why does my auxiliary switch burn out?

However, when adjusting parameters such as breaker distance and over-travel, the initial state of the circuit breaker opening is not adjusted accordingly, which will cause the auxiliary switch to fail to switch the opening circuit normally and cause the opening coil to burn out. 4.

What causes circuit breaker misoperation?

When the control circuit of circuit breaker misoperation is normal, the linkage mechanism causes the failure of circuit breaker misoperation. Improper adjustment of dead point makes the mechanism unable to release in time, overload the coil and burn the opening coil. 3.

What is a circuit breaker?

Circuit breaker is a kind of load switch, which has short-circuit and overload protection functions, and its short-circuit protection function is realized by electromagnetic coil. Because of its complete protection function, easy maintenance and use, it is widely used in power systems.