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Relay facts for kids

Kids Encyclopedia Facts
This page is about electrical switches. For running races, see Relay race.
Electronic component relays
Relays

A relay is an electromagnetically operated switch. It was invented in the 19th century to make electric telegraph signals go farther. Nowadays relays control circuits with low-voltages. Many machines use them, including vehicles and electronics.

Images for kids

  • Delta Electronics DPS-350FB A - board 1 - OEG SDT-SS-112M - case removed-3045

    A relay

  • Relay

    An automotive-style miniature relay with the dust cover taken off

  • Relay contacts

    Telegraph relay contacts and spring

  • Relay Parts

    Simple electromechanical relay

  • Relay animation without flyback diode

    Operation without flyback diode, arcing causes degradation of the switch contacts

  • Relay animation with flyback diode

    Operation with flyback diode, arcing in the control circuit is avoided

  • Relay2

    A small cradle relay often used in electronics. The "cradle" term refers to the shape of the relay's armature

  • Latching relay bistable permanent magnet

    Latching relay with permanent magnet

  • Clare HGRM-55211-P00 mercury-wetted reed relay

    A mercury-wetted reed relay

  • Reedrelay

    (from top) Single-pole reed switch, four-pole reed switch and single-pole reed relay. Scale in centimeters

  • Solid state relay

    Solid-state relays have no moving parts.

  • Solid-state-contactor

    25 A and 40 A solid state contactors

  • ACRelay

    A DPDT AC coil relay with "ice cube" packaging

  • Relay room

    Part of a relay interlocking using UK Q-style miniature plug-in relays

  • Uy-multi1-hy

    Several 30-contact relays in "Connector" circuits in mid-20th century 1XB switch and 5XB switch telephone exchanges; cover removed on one.

See also

Kids robot.svg In Spanish: Relé para niños

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Relay Facts for Kids. Kiddle Encyclopedia.