Safety switches

electrical safety device used in household wiring

In electrical engineering, a disconnector, disconnect switch or isolator switch is a type of switching device with visible contacts, used to ensure that an electrical circuit is completely de-energized for service or maintenance. They are often found in electrical distribution and industrial applications, where machinery must have its source of driving power removed for adjustment or repair. Disconnectors can be operated manually or by a motor, and may be paired with an earthing switch to ground the portion that has been isolated from the system for ensuring the safety of equipment and the per

safety device for oil-filled electrical transformers

electric switch operated by the movement of a machine part or the presence of an object

safety mechanism to quickly shut down a system in an emergency, when it cannot be shut down in the usual manner

switch that is designed to activate if the human operator becomes incapacitated

thumb|SCRAM button at the Experimental Breeder Reactor I|Experimental Breeder Reactor I in Idaho. Sometimes the switch will have a flip cover to prevent inadvertent operation.

electrical safety device

thumb|Four reclosers on the right side of a substation In electric power distribution, a recloser, also known as autorecloser or automatic circuit recloser (ACR), is a switchgear designed for use on overhead electricity distribution networks to detect and interrupt transient faults. Reclosers are essentially rated circuit breakers with integrated current and voltage sensors and a protection relay, optimized for use as a protection asset. Reclosers are governed by the IEC 62271-111/IEEE Std C37.60 and IEC 62271-200 standards. The four major classes of operating maximum voltage are 15.5 kV, 27 k

circuit breaker that detects electric arc faults

electrical safety device

feature of an engineered system that ties together system elements' states to prevent them from changing in a hazardous or incompatible way

switching device used in high voltage power grids

protection device or circuit in electric systems