20 Terms
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Circuit breakers
Industry: Electrical equipment
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Circuit breakers
Operating mechanism
Electrical equipment; Circuit breakers
An internal mechanical system which opens and closes the circuit breaker contacts.
Open/closed indicator
Electrical equipment; Circuit breakers
An indicating means which displays the position (open or closed) of the main contacts.
Long-time and instantaneous (LI)
Electrical equipment; Circuit breakers
A combination of adjustable trip functions including long-time ampere rating, long-time delay, and instantaneous pickup.
Let-through current
Electrical equipment; Circuit breakers
The peak current (measured in amperes) which passes through an overcurrent protective device during an interruption.
Latch cheque switch
Electrical equipment; Circuit breakers
A mechanically-operated switch which senses if the trip latch is reset.
Long-time, instanteneous, ground-fault (LIG)
Electrical equipment; Circuit breakers
A combination of adjustable trip functions including long-time ampere rating, long-time delay, instantaneous pickup, ground-fault pickup and ground-fault delay.
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