Electric circuit breaker comprising parallel-connected vacuum in

Details Electric circuit breaker comprising parallel-connected vacuum in Electric circuit breaker comprising parallel-connected vacuum in

1975-02-10

1976-07-20

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200145, H01H 3366

Patent

active

039708098

ABSTRACT:
This electric circuit breaker comprises a plurality of vacuum-type circuit interrupters electrically connected in parallel with each other and means for opening the interrupters substantially simultaneously during circuit interruption. Each interrupter comprises an evacuated envelope and a pair of relatively-movable contacts located within said envelope that are separable to provide an inter-contact gap across which arcing usually occurs during circuit interruption. The envelope comprises a tubular metal wall portion surrounding the inter-contact gap and a radially-extending opening within this tubular metal wall portion. The metal wall portions of the two interrupters are located in closely adjacent side-by-side relationship, and a short metal tube provides a passage between said openings for conveying arcing products from any inter-contact gap that is then arcing to any that is not then arcing, thereby promoting concurrent arcing at said gaps during high current interruptions.

REFERENCES:
patent: 2897322 (1959-07-01), Reece
patent: 2906841 (1959-09-01), Jennings
patent: 3036180 (1962-05-01), Greenwood
patent: 3331598 (1967-05-01), Streater
patent: 3355564 (1967-11-01), Ranheim
patent: 3356893 (1967-12-01), Lafferty
patent: 3356894 (1967-12-01), Lafferty
patent: 3432713 (1969-03-01), Lafferty
patent: 3441800 (1969-04-01), Lee
patent: 3469048 (1969-09-01), Lee et al.
patent: 3670123 (1972-06-01), Luehring

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