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Circuit breakers
Industry: Electrical equipment
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Circuit breakers
short-circuit delay (STD)
Electrical equipment; Circuit breakers
The length of time the circuit breaker will carry a short circuit (current greater than the short-circuit pickup) before initiating a trip signal.
short-circuit pickup
Electrical equipment; Circuit breakers
The current level at which the circuit breaker shortcircuit delay function begins timing.
sensor size
Electrical equipment; Circuit breakers
Maximum ampere rating possible for a specific circuit breaker, based on the size of the current sensor inside the circuit breaker. Sensor size is less than or equal to frame size.
sensor plug
Electrical equipment; Circuit breakers
A component used with the MICROLOGIC trip system to set the sensor size of a circuit breaker.
sensor
Electrical equipment; Circuit breakers
The current sensing element within the circuit breaker which provides the sensing function for that circuit breaker.
secondary disconnect contacts
Electrical equipment; Circuit breakers
An electrical plug-on connector in the secondary (control) circuit between a drawout circuit breaker and its cradle in the switchboard or switchgear.
safety shutter
Electrical equipment; Circuit breakers
A device that closes to block access to the main disconnects when the circuit breaker is in the disconnected, test or withdrawn position.
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