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  2. NEMA size - Wikipedia

    en.wikipedia.org/wiki/NEMA_size

    NEMA (National Electrical Manufacturers Association) contactors and motor starters are rated by sizes. These sizes are grouped by rated current and power. [1] [2]

  3. Magnetic starter - Wikipedia

    en.wikipedia.org/wiki/Magnetic_starter

    A magnetic starter has a contactor and an overload relay, which will open the control voltage to the starter coil if it detects an overload on a motor. [1] [2] The overload relay opens a set of contacts that are wired in series with the supply to the contactor feeding the motor. The characteristics of the heaters can be matched to the motor so ...

  4. 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.

  5. Utilization categories - Wikipedia

    en.wikipedia.org/wiki/Utilization_categories

    Volume 4-2: Contactors and motor starters - Semiconductor motor controllers and starters for a.c. voltage Volume 5-1: Control apparatus and switching elements - Electromechanical control apparatus[1] Volume 6-1: Multi-function switchgear and controlgear - Mains switches (categories AC-32A/B)

  6. Starter (engine) - Wikipedia

    en.wikipedia.org/wiki/Starter_(engine)

    An automobile starter motor (larger cylinder). The smaller object on top is a starter solenoid which controls power to the starter motor and engages the Bendix drive.. A starter (also self-starter, cranking motor, or starter motor) is a device used to rotate (crank) an internal-combustion engine so as to initiate the engine's operation under its own power.

  7. Motor soft starter - Wikipedia

    en.wikipedia.org/wiki/Motor_soft_starter

    A motor soft starter is a device used with AC electrical motors to temporarily reduce the load and torque in the powertrain and electric current surge of the motor during start-up. This reduces the mechanical stress on the motor and shaft, as well as the electrodynamic stresses on the attached power cables and electrical distribution network ...

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