20 Terms
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Circuit breakers
Industry: Electrical equipment
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Circuit breakers
auxiliary switch
Electrical equipment; Circuit breakers
A switch mechanically operated by the main device for signaling, interlocking, or other purposes.
automatic molded case switch
Electrical equipment; Circuit breakers
A switch with construction similar to a molded case circuit breaker except that the switch opens only instantaneously at a non-adjustable trip point calibrated to protect only the molded case switch ...
amperes interrupting rating (AIR)
Electrical equipment; Circuit breakers
The highest current at rated voltage that an overcurrent protective device is intended to interrupt under specified test conditions (NEC).
ampere
Electrical equipment; Circuit breakers
The equivalent of one coulomb per second or the steady current produced by one volt applied across a resistance of one ohm.
ampacity
Electrical equipment; Circuit breakers
The current, in amperes, that a conductor or circuit breaker can carry continuously under the conditions of use without exceeding its temperature rating.
ammeter (local current meter)
Electrical equipment; Circuit breakers
A module that mounts directly to the circuit breaker trip unit and reports RMS phase and ground-fault current values as seen by the trip unit. Current values are displayed one phase at a time.
ambient temperature rating
Electrical equipment; Circuit breakers
Temperature at which the continuous current rating (handle rating) of a circuit breaker is based; the temperature of the air immediately surrounding the circuit breaker which can affect the thermal ...
