Circuit BreakerFree Patent Search

  • Method forming an electric contact in a vacuum circuit breaker

    Circuit Breaker Abstract According to the present invention there are provided a highly reliable electrode of high strength which undergoes little change even with the lapse of time, and a method for making the same, as well as a vacuum valve using s...

  • Electrical generator damage protection apparatus and method with circuit breaker trip initiation

    Circuit Breaker Abstract An electrical generator damage protection apparatus is provided. The protection apparatus includes a circuit breaker which opens and closes an electrical circuit in response to a breaker control signal. A controller is operat...

  • Circuit breaker accessory module

    Circuit Breaker Abstract An accessory module for monitoring and controlling the status of a circuit breaker. The accessory module attaches to the side of a circuit breaker and has a mechanism similar to the mechanism in a circuit breaker. The mechani...

  • Residential circuit breaker with arcing fault detection

    Circuit Breaker Abstract A circuit breaker thermal-magnetic trip unit for arcing fault detection includes a current transformer having a gapped magnetic core arranged around the load side of the trip unit. The bimetal within the trip unit is position...

  • Circuit breaker testing apparatus having adjustable inductor for controlling magnitude of current flo

    Circuit Breaker Abstract A circuit breaker testing apparatus includes an electrical circuit, an adjustable inductor connected in the circuit and a transducer for sensing current flow in the circuit. The circuit has leads terminated by electrical conn...

  • High-voltage circuit-breaker that inserts a resistance on closure

    Circuit Breaker Abstract The present invention relates to a high-voltage circuit-breaker including a casing that is filled with a dielectric gas and that contains a first arcing contact and a second arcing contact, which arcing contacts are mounted t...

  • Current limiting circuit breaker

    Circuit Breaker Abstract A molded plastic current limiting circuit breaker includes an interrupter assembly that includes an over-molded magnet, arc stack, baffle stack, and a chamber liner in which a trip unit is described. Circuit Breaker Claims Wh...

  • Mechanical switching device such as a circuit breaker and a safety device for the circuit breaker

    Circuit Breaker Abstract A safety device for mechanical switching devices such as circuit breakers which can be mounted on mounting surfaces or plugged into plug-in pin bases. The safety device ensures that the mechanical switching device is tripped...

  • Circuit breaker remote closing operator

    Circuit Breaker Abstract A remote closing operator is positioned within a circuit breaker enclosure to allow remote operation of the circuit breaker operating mechanism to close the circuit breaker contacts. A closing solenoid and associated logic ci...

  • Operation mechanism of circuit breaker

    Circuit Breaker Abstract An operation mechanism of a circuit breaker which is highly reliable and inexpensive and in which an intermittent meshing of toothed wheels and resultant noise do not occur. The operation mechanism includes a gear wheel for d...

  • Gas circuit breaker

    Circuit Breaker Abstract A gas circuit breaker having a single supporting structure easy to be inspected. The gas circuit breaker includes: a grounded tank in which a gas is enclosed; a fixed contact contained in the tank; a moving contact contained...

  • Circuit breaker having arc gas suppressing barrier on a movable contact

    Circuit Breaker Abstract A distribution circuit breaker for two circuits operated by a common handle, in which an arc gas generated in one circuit is prevented from flowing into the other circuit includes a breaking mechanism chamber (A) for a first...

  • Interlock arrangement for circuit breaker compartments

    Circuit Breaker Abstract An interlock arrangement between a pair of industrial rated circuit breakers in adjoining circuit breaker compartments utilizes a pair of circuit breaker interlock units, one mounted on the rear surface of each circuit breake...

  • Current limiting circuit breaker

    Circuit Breaker Abstract A plurality of solid-state switches are provided in parallel with a main circuit switch. A main circuit current is detected by a first current detecting device. A current flowing in each of the plurality of solid-state switch...

  • Fault current limiter and alternating current circuit breaker

    Circuit Breaker Abstract A solid-state circuit breaker and current limiter for a load served by an alternating current source having a source impedance, the solid-state circuit breaker and current limiter comprising a thyristor bridge interposed betw...

  • Insulation gas filled circuit breaker

    Circuit Breaker Abstract An insulation gas filled circuit breaker in which a circuit breaking portion including two separably opposing contacts and a capacitor connected in parallel between the two contacts in the circuit breaking portion are dispose...

  • Operating mechanism of a circuit breaker with a locking system disengageable on a short circuit

    Circuit Breaker Abstract A mechanism for a multipole circuit breaker with high currents and high electrodynamic strength, comprising a toggle device associated to a trip hook and a switching bar, an opening ratchet cooperating with the hook to perfor...

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  • Total 68 pages, 1156 patent(s)