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  2. Contactor - Wikipedia

    en.wikipedia.org/wiki/Contactor

    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. Circuit diagram - Wikipedia

    en.wikipedia.org/wiki/Circuit_diagram

    A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations.

  4. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    1A1A44J5 - Unit 1, Assembly 1, Sub-Assembly 44, Jack 5 (J5 is a connector on a box referenced as A44) 1A1A45J333 - Unit 1, Assembly 1, Sub-Assembly 45, Jack 333 (J333 is a connector on a box referenced as A45) A cable connecting these two might be: 1A1W35 - In the assembly A1 is a cable called W35. Connectors on this cable would be designated:

  5. Relay - Wikipedia

    en.wikipedia.org/wiki/Relay

    A solid-state contactor is a heavy-duty solid state relay, including the necessary heat sink, used where frequent on-off cycles are required, such as with electric heaters, small electric motors, and lighting loads. There are no moving parts to wear out and there is no contact bounce due to vibration.

  6. Mercury relay - Wikipedia

    en.wikipedia.org/wiki/Mercury_relay

    The displaced mercury rises in the tube, [ii] sufficiently to bridge the contacts and complete the circuit between them. Around the top part of the tube is placed the coil. When energised, this coil attracts the slug, [iii] lifting it upwards and out of the mercury pool. The mercury is no longer displaced, and thus flows downwards, away from ...

  7. Transfer switch - Wikipedia

    en.wikipedia.org/wiki/Transfer_switch

    Simplified single line diagram of a single-phase transfer switch to select either 'city' (utility) power or local generator power 3-phase Intelligent transfer switch. A transfer switch is an electrical switch that switches a load between two sources. Some transfer switches are manual, in that an operator effects the transfer by throwing a ...

  8. Generator (circuit theory) - Wikipedia

    en.wikipedia.org/wiki/Generator_(circuit_theory)

    A generator in electrical circuit theory is one of two ideal elements: an ideal voltage source, or an ideal current source. [1] These are two of the fundamental elements in circuit theory. Real electrical generators are most commonly modelled as a non-ideal source consisting of a combination of an ideal source and a resistor.

  9. 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.

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