Letter Sh

Short Circuit A normally unintended low resistance path for current.


Shunt Trip
A circuit breaker accessory used to remotely trip a circuit
breaker.


Single Quadrant Operation
Describes the operation of a variable speed drive that can
provide torque to drive the motor, but cannot provide braking
torque.


Slip
The difference between the synchronous speed of a threephase
induction motor and the rotor speed. Slip is often
expressed as a percentage.

Solid-State

Used to describe equipment that contains semiconductor
devices in an electronic circuit.