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circuit breaker (plural circuit breakers)

  1. (electrical engineering) An electrical switch capable of opening and closing an electrical circuit in all operating conditions, including fault situations.
    • 2019 October, Roger Ford, “Power failure highlights specification confusion”, in Modern Railways, page 27:
      Typically traction packages monitor the supply frequency and if it strays outside pre-set limits open the circuit breaker between the pantograph and the transformer to shut off the power.

Derived termsEdit

  • VCB (vacuum circuit breaker)


See alsoEdit