Circuit breakers

Circuit breakers

Industry: Electrical equipment

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Circuit breakers

power-zone®

Electrical equipment; Circuit breakers

The family of low-voltage and medium-voltage switchgear.

rms current sensing

Electrical equipment; Circuit breakers

A method of determining the true RMS current of sinusoidal and non-sinusoidal waveforms by sampling the current waveform a number of times per cycle, then calculating the true RMS value.

underwriters laboratories inc. (ul)

Electrical equipment; Circuit breakers

An independent, not-for-profit standards development, product safety testing and certification organization.

zone-selective interlocking (ZSI)

Electrical equipment; Circuit breakers

A communication capability between electronic trip systems and ground-fault relays which permits a short circuit or ground fault to be isolated and cleared by the nearest upstream device with no ...

zero-sequence ground-fault sensing

Electrical equipment; Circuit breakers

A means of providing equipment ground-fault protection utilizing an external sensor (surrounding all phase and neutral conductors).

zero-blind time

Electrical equipment; Circuit breakers

Metering method used by the MICROLOGIC® H trip unit where a dedicated metering data chain is separate from the protection data chain so that a greater number of data samples can be used for ...

withstand rating

Electrical equipment; Circuit breakers

The level of RMS symmetrical current that a circuit breaker can carry with the contacts in a closed position for a stated period of time–usually stated in cycles.