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Circuit breakers
Industry: Electrical equipment
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Circuit breakers
Ground-fault delay
Electrical equipment; Circuit breakers
The length of time the circuit breaker trip unit will delay before initiating a trip signal to the circuit breaker after a ground fault has been detected.
Frame size
Electrical equipment; Circuit breakers
The largest ampere rating available in a group of circuit breakers of similar physical configuration.
Fixed-mounted circuit breaker
Electrical equipment; Circuit breakers
A circuit breaker so mounted that it cannot be removed without removing primary and sometimes secondary connexions and/or mounting supports.
Electronic trip circuit breaker
Electrical equipment; Circuit breakers
A circuit breaker which uses current sensors and electronic circuitry to sense, measure and respond to current levels.
Motor operator
Electrical equipment; Circuit breakers
An electrical device used to open and close a circuit breaker or switch and reset a circuit breaker. See also spring charging motor.
Overcurrent trip switch (SDE)
Electrical equipment; Circuit breakers
A mechanically-operated switch which indicates when a circuit breaker has tripped due to overcurrent conditions.
Overcurrent trip element
Electrical equipment; Circuit breakers
A device which detects an overcurrent and transmits the energy necessary to open the circuit automatically (UL only).
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