Permanent magnet rotating arc switch

Details Permanent magnet rotating arc switch Permanent magnet rotating arc switch

1981-04-02

1984-01-03

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3318

Patent

active

044244282

ABSTRACT:
The invention concerns a rotating arc switch using a permanent magnet (38) arc blow-out. The permanent magnet is housed inside the fixed contact (16) and is thermally and electrically isolated from it by an insulating layer (46). The permanent magnet (38) is placed against the annular contact (36) surface, very close to the breaking zone, and has a cavity (40) opposite the central opening of the annular surface (36). The magnetic blow-out is combined with a pneumatic blow out by escape of the warmed gases towards an expansion chamber (36).

REFERENCES:
patent: 2725446 (1955-11-01), Slepian
patent: 3082307 (1963-03-01), Greenwood
patent: 4225762 (1980-09-01), Zuckler

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