Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1978-01-05
1980-07-29
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
H01H 3366
Patent
active
042152550
ABSTRACT:
A vacuum arc current switching device employs a shielding arrangement including a plurality of coaxially disposed cylindrical non-conducting members for minimizing exposure of the interior wall surfaces of the enclosure to vapor deposition of cathode material so as to prevent the formation of secondary arc terminals on the interior surfaces of the enclosure. The shielding being non-conducting prevents secondary arc formation which would otherwise permit arcing from the cathode to the shield and then back to the anode. The shielding further comprises annular transverse members disposed at the ends of the enclosure so as to protect the end wall surfaces as well.
REFERENCES:
patent: 2431226 (1947-11-01), Berkey et al.
patent: 3026394 (1962-03-01), Jennings
patent: 3087034 (1963-04-01), Beers et al.
patent: 3953693 (1976-04-01), Pflanz
Heberlein Joachim V. R.
Holmes Francis A.
Kimblin Clive W.
Slade Paul G.
Voshall Roy E.
Electric Power Research Institute Inc.
Macon Robert S.
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