Circuit breakers

Circuit breakers

Industry: Electrical equipment

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Circuit breakers

Overcurrent mechanism

Electrical equipment; Circuit breakers

An internal mechanical system which trips the circuit breaker during an overcurrent.

Overcurrent

Electrical equipment; Circuit breakers

Any current in excess of the rated continuous current of equipment or the ampacity of a conductor.

Inverse time

Electrical equipment; Circuit breakers

A qualifying term indicating there is purposely introduced a delay in the tripping action of the circuit breaker, which delay decreases as the magnitude of the current increases.

The highest current at rated voltage available at the incoming terminals of the circuit breaker. When the circuit breaker can be used at more than one voltage, the interrupting rating will be shown ...

Interchangeable trip unit

Electrical equipment; Circuit breakers

A trip unit which can be interchanged by a user among circuit breaker frames of the same design.

Integral ground-fault protection for equipment

Electrical equipment; Circuit breakers

Equipment ground-fault protection on grounded neutral systems provided by components internal to the circuit breaker.

Miniature circuit breaker (MCB)

Electrical equipment; Circuit breakers

A small circuit breaker which is assembled as an integral unit in a supportive and enclosed housing of insulating material, rated 150 A or less and used in 120 V, 120/240 V, 240 V and 480Y/277 V ac ...