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  2. Relay - Wikipedia

    en.wikipedia.org/wiki/Relay

    A relay Electromechanical relay principle Electromechanical relay schematic showing a control coil, four pairs of normally open and one pair of normally closed contacts An automotive-style miniature relay with the dust cover taken off. A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple ...

  3. General Electric Specialty Control Plant - Wikipedia

    en.wikipedia.org/wiki/General_Electric_Specialty...

    In 1981, GE made preparations to sell both the relay and the printer businesses and the management-buyout was completed in October 1983. The announcement was made to the employees on October 21. GE financed a small portion of the buyout price. A new company was formed with the name Genicom Corporation. This new venture included both relays and ...

  4. ANSI device numbers - Wikipedia

    en.wikipedia.org/wiki/ANSI_device_numbers

    The device numbers are enumerated in ANSI/IEEE Standard C37.2 Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations. Many of these devices protect electrical systems and individual system components from damage when an unwanted event occurs such as an electrical fault .

  5. Protective relay - Wikipedia

    en.wikipedia.org/wiki/Protective_relay

    Electromechanical protective relays at a hydroelectric generating plant. The relays are in round glass cases. The rectangular devices are test connection blocks, used for testing and isolation of instrument transformer circuits. In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is ...

  6. 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.

  7. Electromechanics - Wikipedia

    en.wikipedia.org/wiki/Electromechanics

    It was an electromechanical relay-based device; cycles took seconds. In 1968 electromechanical systems were still under serious consideration for an aircraft flight control computer, until a device based on large scale integration electronics was adopted in the Central Air Data Computer.

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