What Protective Functions Does an Air Circuit Breaker Have?

Air circuit breakers are an indispensable protective device in electrical systems. They have multiple protection functions such as short circuit protection, overload protection, and ground fault protection, which can effectively protect electrical equipment and personal safety.

1. Short circuit protection function

The air circuit breaker has a short circuit protection function, that is, when the circuit encounters a short circuit fault, it can quickly and effectively cut off the circuit connection to prevent the circuit from suffering further damage. The performance of its short circuit protection mainly depends on its rated short-time withstand current capability, which is usually set to be able to withstand a higher short-circuit current level.

2. Overload protection function

The air circuit breaker also has an overload protection function. When the current in the circuit exceeds the preset rated value, the air circuit breaker will automatically trigger the tripping mechanism and cut off the circuit connection to prevent electrical equipment from being damaged due to excessive load. The performance of its overload protection mainly depends on the setting of its rated current value.

3. Ground fault protection function

The air circuit breaker also has a ground fault protection function, that is, when a ground fault occurs in the circuit, it can respond quickly and cut off the circuit to ensure personal safety and the stable operation of electrical equipment. The performance of its ground fault protection is usually reflected by the parameters of rated leakage operating current and operating time.

4. Undervoltage protection function

The air circuit breaker also has an undervoltage protection function. When the voltage in the circuit drops below the rated value, the air circuit breaker will automatically trip and cut off the circuit connection to protect the electrical equipment from the adverse effects of the undervoltage state.

5. Overvoltage protection function

In addition, the air circuit breaker also has an overvoltage protection function. When the voltage in the circuit exceeds the rated value, the air circuit breaker can automatically trigger the tripping mechanism and cut off the circuit connection to prevent the electrical equipment from being damaged due to excessive voltage.