Knife switch
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A knife switch is a type of switch used to control the flow of electricity in a circuit. It is composed of a hinge which allows a metal lever, or knife, to be lifted from or inserted into a slot or ja
Open single-pole single-throw (SPST) knife switch
1917 motor switch, with extra contacts
Dual-pole, dual-throw knife switch in one of its two closed positions
Circuit breaker
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A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by current in excess of that which the equipment can safely carry. Its basic function is t
Knife switch
…can only be opened by switching off the power. In modern applications, automatic switches (such as contactors and relays) and manual switches such as circuit breakers are used. These devices use snap-action mechanisms which open the switch contacts rapidly and feature arc chutes where the arcs caused by opening the…
A two-pole miniature circuit breaker
An air circuit breaker for low-voltage (less than 1,000 volt) power distribution switchgear
Four one-pole miniature circuit breakers
High voltage plasma arc chutes inside a Benedict LS25 Solar DC Isolator switch