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  2. Contactor - Wikipedia

    en.wikipedia.org/wiki/Contactor

    AC contactor for pump application. A contactor is an electrically controlled switch used for switching an electrical power circuit. [1] A contactor is typically controlled by a circuit which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 230-volt motor switch.

  3. Contact protection - Wikipedia

    en.wikipedia.org/wiki/Contact_protection

    Typical contact elements of an electromechanical relay or contactor. A “contact” is a pair of electrodes (typically, one moving; one stationary) designed to control electricity. Electromechanical switches, relays, and contactors “turn power on” when the moving electrode makes contact with the stationary electrode to carry current.

  4. Magnetic starter - Wikipedia

    en.wikipedia.org/wiki/Magnetic_starter

    Contactor with overload relay. A magnetic starter is an electromagnetically operated switch which provides a safe method for starting an electric motor with a large load. Magnetic starters also provide under-voltage and overload protection and an automatic cutoff in the event of a power failure.

  5. Relay - Wikipedia

    en.wikipedia.org/wiki/Relay

    A contactor is a heavy-duty relay with higher current ratings, [21] used for switching electric motors and lighting loads. Continuous current ratings for common contactors range from 10 amps to several hundred amps. High-current contacts are made with alloys containing silver.

  6. Electrical contact - Wikipedia

    en.wikipedia.org/wiki/Electrical_contact

    An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers. [1] Each contact is a piece of electrically conductive material, typically metal .

  7. Motor control center - Wikipedia

    en.wikipedia.org/wiki/Motor_control_center

    A motor control center (MCC) is an assembly to control some or all electric motors in a central location. It consists of multiple enclosed sections having a common power bus and with each section containing a combination starter, which in turn consists of motor starter , fuses or circuit breaker , and power disconnect . [ 1 ]

  8. Starter solenoid - Wikipedia

    en.wikipedia.org/wiki/Starter_solenoid

    The starter motor is a series, compound, or permanent magnet type electric motor with a solenoid and solenoid operated switch mounted on it. When low- current power from the starting battery is applied to the starter solenoid, usually through a key -operated switch, the solenoid closes high-current contacts for the starter motor and it starts ...

  9. Mercury relay - Wikipedia

    en.wikipedia.org/wiki/Mercury_relay

    A mercury relay (mercury displacement relay, mercury contactor) is a relay that uses mercury as the switching element. They are used as high-current switches or contactors , where contact erosion from constant cycling would be a problem for conventional relay contacts.

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