Circuit BreakerFree Patent Search

  • Circuit breaker with arcing fault detection module

    Circuit Breaker Abstract An arcing fault detecting module is attached to a circuit breaker employing a thermal-magnetic trip unit to separate the circuit breaker contacts upon occurrence of an arcing fault. The arcing fault module contains a logic ci...

  • Circuit breaker electronic trip unit with adjustable settings

    Circuit Breaker Abstract A circuit breaker trip unit enclosure is adapted to receive rotary knobs that are limited in rotation in proportion to the circuit breaker short circuit rating. The externally-accessible rotary knobs extend within the enclosu...

  • Lock out mechanism for circuit breaker handle operator

    Circuit Breaker Abstract The handle operator for a circuit breaker mounted in an enclosure is locked in the OFF position when the enclosure is opened by a lock-out member which directly engages the operator member of the handle operator which contact...

  • Gas circuit breaker

    Circuit Breaker Abstract A gas circuit breaker includes a case body in which an insulating gas is enclosed, a stationary contact part accommodated in the case body and equipped with tulip type stationary contact members, and a movable contact part ha...

  • Improved calibration means for a circuit breaker

    Circuit Breaker Abstract A circuit breaker device for interrupting current in a circuit path between a source and a load includes a first contact and a second contact cooperatively arranged in the circuit path so as to provide current from a source t...

  • Circuit breaker contact position indicating unit

    Circuit Breaker Abstract A circuit breaker contact position indicator is mounted on the same support platform as the circuit breaker electronic trip unit and contains a micro-switch to provide indication to the trip unit of the status of the circuit...

  • Programming device for a circuit breaker

    Circuit Breaker Abstract A portable programming device is provided for communicating with and downloading tripping characteristics to a circuit breaker electronic trip unit. The programming device incorporates an umbilical cable which is attached to...

  • Stock giving off arc-extinguishing gas, and gas-blast circuit breaker comprising such a stock

    Circuit Breaker Abstract The stock contains an insulating-material matrix and a filler embedded in the matrix and is distinguished by a cellular structure. The predominant portion of the cells is filled with a material having arc-extinguishing proper...

  • Method of protecting against failure of a circuit breaker

    Circuit Breaker Abstract The invention relates to a method of protecting against circuit breaker failure, said circuit breaker having contacts capable of moving between a closed position and an open position, and vice versa, and being fitted with pro...

  • Electrical contact for use in a circuit breaker and a method of manufacturing thereof

    Circuit Breaker Abstract An electrical contact for use in an electrical switching device is provided having low contact resistance, high wear resistance and high anti-weld characteristics. The contact includes a material composition of between 0.2 an...

  • Molded case circuit breaker with adapter for use with ring lug terminations

    Circuit Breaker Abstract A miniature molded case circuit breaker is adapted for use with load conductors having ring lug terminations by extending the circuit breaker load terminal conductor through the terminal recess and beyond the molded housing....

  • Selective trip unit for a multipole circuit breaker

    Circuit Breaker Abstract A selective magnetic trip unit comprises a fixed magnetic armature located facing a movable magnetic armature and a damping device with a blade mounted on the movable magnetic armature. The damping device is designed to be in...

  • Trip flag guide for a circuit breaker

    Circuit Breaker Abstract A circuit breaker device for interrupting current in a circuit path between a source and a load. The device includes a first contact and a second contact cooperatively arranged in the circuit path so as to provide current fro...

  • Adjustable trip unit and circuit breaker incorporating same

    Circuit Breaker Abstract A solenoid type magnetic trip assembly for a molded case circuit breaker includes an armature biased against an adjustable stop by a tension spring to set the initial gap for the magnetic trip, so that the spring bias remains...

  • Circuit breaker with sense bar to sense current from voltage drop across bimetal

    Circuit Breaker Abstract The stray inductance created by the loop formed by voltage sensing conductors connected to opposite ends of the bimetal in a miniature circuit breaker for determining load current is reduced by joining a voltage sense bar to...

  • Circuit breaker with grid support mounted over stationary contactor

    Circuit Breaker Abstract In a circuit breaker, a grid support (12) having a pair of side walls (12a) which are confronted with each other, is provided by molding resin, and arc-extinction grids (6) are inserted into grooves formed in the side walls (...

  • Arc fault detection apparatus and circuit breaker incorporating same

    Circuit Breaker Abstract Arcing-faults in an electric power distribution system are detected by a circuit which includes a band-pass filter generating a low frequency bandwidth limited arcing current signal having a bandwidth above the measurable har...

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  • Total 68 pages, 1156 patent(s)