Arcing chamber with perforated plates of sieve-like ceramics

Details Arcing chamber with perforated plates of sieve-like ceramics Arcing chamber with perforated plates of sieve-like ceramics

1978-09-13

1981-03-03

Scott, James R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200147R, H01H 3308

Patent

active

042543142

ABSTRACT:
An arcing chamber for electric power circuit breakers is disclosed in which perforated, sieve-like ceramic plates define a wedge-shaped arcing space.
An essential part of the disclosure is the use of conical holes in the plates which decrease in diameter from the arcing space sides of the plates toward the outside. The hole size used in areas where the arc travels and is quenched differs from that used in the remaining part of the arcing space. The space where the arc originates is made without holes.
The invention is suitable particularly for fast-acting D.C. breakers.

REFERENCES:
patent: 2306204 (1942-12-01), Boehne
patent: 2393164 (1946-01-01), Hobson
patent: 2623139 (1952-12-01), Weston
patent: 2836683 (1958-05-01), Souchet
patent: 2861152 (1958-11-01), Scully
patent: 2942084 (1960-06-01), Boehne
patent: 3649791 (1972-03-01), Kruckewitt
patent: 4019006 (1977-04-01), Strossner

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