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Chongqing Paize Motorcycle Parts Co.,Ltd
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Motorcycle start relay

- Apr 12, 2018 -

A relay is an electrically operated switch.Many relays use an electromagnet to mechanically operate a switch,but other operating principles are aslo used ,such as solid-state relays.Relays are used where it is necessary to control a circuit by a separate low-power signal ,or where several circuits must be controlled by one signal .The first relays were used in long distance telegraph circuits as amplifiers:they repeated the signal coming in from one circuit and re-transmitted it on another circuit .Relays were used extensively in telephone exchanges and early computers to perform logical operations.

A type of relay that can handle the high power required to directly control an electric motor or other loads is called a contactor .Solid -state relay control power circuits with no moving parts ,instead using a semiconductor device to perform switching .Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults:in mordern electric power system these functions are performed by digital instruments still called "protective relays".

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