Resistor applications for high-power circuit breakers

Details Resistor applications for high-power circuit breakers Resistor applications for high-power circuit breakers

H - Electricity

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H

306/235

H01H 33/64 (2006.01) H01H 33/16 (2006.01)

Patent

CA 1075744

41,275 RESISTOR APPLICATIONS FOR HIGH-POWER CIRCUIT BREAKERS ABSTRACT OF THE DISCLOSURE A resistor assembly, together with a serially- connected resistor break, is connected in parallel, or shunting relationship, to an interrupting assembly, and ar- ranged so that the resistor contacts remain closed while the main power-interrupting contacts open, and thereby divert the series line current through the resistor assemblage. This reduces the magnitude of the power-transmission line- current being interrupted, and lowers the rate of voltage rise across the main contacts so that arc reignition does not occur. During the closing operation of the circuit- breaker, the mechanical operating arrangement is such that the resistor contacts close prior to the closing of the main power interrupting contacts, so that any voltage surges occurring during the electrical charging of the transmission line are adequately controlled. In another embodiment of the present invention, a generally V-shaped interrupting assemblage is bridged by one or more resistor assemblages in a generally-horizontal fashion, the resistor assemblage having its own series-con- nected break, the latter being mechanically linked or con- nected to the operating-rod structure of the main power interrupting assemblage, constituting one of the upstanding leg portions of the V-shaped power interrupting assemblage. In a particular embodiment, each of the legs encloses its own main power break, and the resistor assemblage may include two series resistor breaks, if desired, together with one or -1- more series resistor elements or assemblages. -2-

243685

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