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Circuit breakers
Industry: Electrical equipment
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Circuit breakers
stored energy mechanism (SEM)
Electrical equipment; Circuit breakers
A spring mechanism that is compressed or “charged” and then released or “discharged” to close the circuit breaker.
spring charging motor
Electrical equipment; Circuit breakers
A motor which electrically charges the stored energy closing spring(s).
spring-charging handle
Electrical equipment; Circuit breakers
A handle located on the front of the circuit breaker used to manually charge the stored energy mechanism.
shunt trip (MX)
Electrical equipment; Circuit breakers
An accessory which trips the circuit breaker from a remote location using an external voltage source.
shunt close (closing coil) (XF)
Electrical equipment; Circuit breakers
An accessory which closes the circuit breaker from a remote location using an external voltage source.
short-time pickup
Electrical equipment; Circuit breakers
The current level at which the circuit breaker shorttime delay function begins timing.
short-time delay
Electrical equipment; Circuit breakers
The length of time the circuit breaker will carry a short circuit (current greater than the short-time pickup) before initiating a trip signal.
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