Causes of circuit breaker tripping

Causes for circuit breaker tripping: overload, short circuit, circuit leakage, instantaneous overvoltage, and excessive ambient temperature.

1. Overload

Overload means that the load in the circuit exceeds the rated current of the circuit breaker, causing the circuit breaker to trip. The cause of overload may be that the power of the electrical equipment is too large, or there are too many electrical equipment in the circuit, causing the total current to exceed the rated current of the air switch. The basis for judging overload is "heat". The greater the current, the greater the heat.

2. Short circuit

Short circuit refers to the direct contact between two or more conductors in the circuit, causing the circuit breaker to trip due to excessive current. The cause of the short circuit may be aging wires, Damage or internal malfunction of electrical equipment. The way to judge a short circuit is to trip immediately after re-closing. If the reset button does not protrude after tripping, it means it is caused by a short circuit.

3. Circuit leakage

Once a leakage fault occurs in the circuit, the circuit breaker will trip immediately and the reset button on the circuit breaker will pop up. We need to solve the leakage problem first and reset the button before the circuit breaker can be re-closed.

4. Instantaneous overvoltage

Instantant overvoltage refers to the sudden occurrence of excessive voltage in the circuit, causing the circuit breaker to trip. The cause of instantaneous overvoltage may be lightning strikes, power grid failures, or electromagnetic interference generated when electrical equipment switches on and off.

5. The ambient temperature is too high

The ambient temperature is too high, which will cause the internal temperature of the circuit breaker to rise, exceeding the rated temperature, causing the circuit breaker to trip. The reasons for excessive ambient temperature may be high temperature weather in summer, intensive use of electrical equipment, etc.