Anonymous
Anonymous asked in SportsSwimming & Diving · 8 years ago

What is relay ? and what are the function of relay ?

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  • 8 years ago
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    relay is electro magnetic device act like switch. its function is to on/Off depends on type.

    when you press on button in TV remote control, relay will power on the TV indside the power supply.

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  • Anonymous
    8 years ago

    A relay is an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism mechanically, but other operating principles are also used. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits, repeating the signal coming in from one circuit and re-transmitting it to another. 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 relays 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 modern electric power systems these functions are performed by digital instruments still called "protective relays".

    Con

    Source(s): kush
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  • Paula
    Lv 4
    4 years ago

    Not that I know of, relays do rely on a spring to go back to its original position whether one or two pole. you could cange the configuration to send a voltage to meet relays spec instead of other way around.

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  • Anonymous
    8 years ago

    funion on or off

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