IULHK121-30211-1

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IULHK121-30211-1 is a circuit breaker, and the application field and working principle are as follows.

Application Field

IULHK121-30211-1 can be used in industrial and residential applications; as circuit breaker for low-voltage and electricity distribution. It can also be used in AC50Hz/60Hz circuit, whose rated operational voltage of up to 380V and rated operational current of up to 250A. It provides protection against overload, short circuit, undervoltage and phase reversed.

Working Principle

The working principle of IULHK121-30211-1 circuit breaker is based on the electromagnet principle. When the flow of current through the contact reaches the trip current, the electromagnetic core of the circuit breaker is activated, and the contact moves rapidly under the action of the electromagnetic force, breaking the circuit and cutting off the power supply. After the failure is removed, turn the handle back to the close position to make the contact close again, and the circuit breaker is restored to normal.

When the current is greater than the current set in the trip coil, the circuit breaker operates quickly and automatically cut off the circuit. After the fault is removed, the circuit breaker can be reset by turning the handle back to the off state. This is what is known as a "trip" and "reset" action.

IULHK121-30211-1 circuit breaker has many protection functions, such as over current, over voltage, phase loss, phase reverse, grounding, short circuit and leakage protection, which can play a good role in protecting the power grid and electrical equipment and appliances.

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