Gas blast circuit breaker combining a magnetically driven rotati

Details Gas blast circuit breaker combining a magnetically driven rotati Gas blast circuit breaker combining a magnetically driven rotati

1982-01-11

1983-10-11

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200147R, H01H 3388, H01H 3318

Patent

active

044094477

ABSTRACT:
A circuit breaker having a pair of main contacts for carrying electrical current flow during closed contact operation is provided with a pair of concentric auxiliary electrodes and magnetic means for rotating an arc produced by the arc current at the opening of the electrodes and puffer means for supplying a compressed flow of arc extinguishing gas between the auxiliary electrodes when the circuit breaker is opened. In one example, each auxiliary electrode has a magnetic means located therewithin to produce a self-induced magnetic field which drives the arc around the circumference of the auxiliary electrode. In an alternative embodiment, one auxiliary electrode included a rapidly expanding nozzle, and the other auxiliary electrode is shaped as a solid cylindrical pin located concentric with said nozzle. In the preferred embodiment, the insulating gas comprises sulfur hexafluoride.

REFERENCES:
patent: 3739125 (1973-06-01), Noeske
patent: 3947649 (1976-03-01), Hertz
patent: 4032736 (1977-06-01), Ruffieux et al.
patent: 4041263 (1977-08-01), Noeske
patent: 4048456 (1977-09-01), Noeske
patent: 4052576 (1977-10-01), Smith
patent: 4052577 (1977-10-01), Votta
patent: 4079219 (1978-03-01), Weston
patent: 4080521 (1978-03-01), Goedecke et al.
"Electromagnetic Extinction of Arc in SF.sub.6," Elektrichestvo, by Poltev, A. I., et al., No. 3, pp. 59-63, 1967.
"Rotating Arc Driver by Magnetic Flux in SF.sub.6 Gas," by Fujiwari, K., et al., Yaskawa Electric Mfg. Co. Ltd., Kitayusha, Japan, Second International Symposium on Switch Arc Phenomena, 9-1973.
"The SF.sub.6 Circuit-Breaker Breakthrough in Medium Voltage Confirmed," by Hennebert J., Merlin Gerlin, France, Cired Paper #T44, 1975.
"Self-Blasting, A New Switching Principle for Economical SF.sub.6 Circuit Breakers," by Jakob, T., et al., Brown Boveri & Co., Ltd., Baden, Switzerland, 1-1978.

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