SF.sub.6 circuit-breaker incorporating both a varistor and a cap

Details SF.sub.6 circuit-breaker incorporating both a varistor and a cap SF.sub.6 circuit-breaker incorporating both a varistor and a cap

1992-04-02

1993-08-10

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148A, 200148R, H01H 3316, H01H 3382

Patent

active

052351475

ABSTRACT:
A high tension circuit-breaker has an insulating case filled with a dielectric gas such as SF.sub.6. A high capacitance capacitor and at least a varistor are electrically interconnected in parallel and are connected to a first terminal. The capacitor and varistor are associated with an insertion mechanism which momentarily inserts the capacitor and varistor in parallel with the arcing contacts during circuit-breaker disengagement or engagement. The insulating case is extended by at least one conductive case housing both the capacitor and at least part of the varistor.

REFERENCES:
patent: 4383150 (1983-05-01), Cromer et al.
patent: 4421962 (1983-12-01), Thuries et al.
patent: 4434332 (1984-02-01), Yanabu et al.
patent: 4439651 (1984-03-01), Thuries et al.
patent: 4636599 (1987-01-01), Talir
patent: 5124872 (1992-06-01), Pham et al.
patent: 5164559 (1992-11-01), Pham et al.
patent: 5170023 (1992-12-01), Pham et al.

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