Molded case circuit breaker with arc suppressant features includ

Details Molded case circuit breaker with arc suppressant features includ Molded case circuit breaker with arc suppressant features includ

1996-08-01

1998-04-28

Gellner, Michael L.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Magnetic blowout

218148, 218 36, H01H 944, H01H 930

Patent

active

057447721

ABSTRACT:
An electromagnetic circuit breaker is provided with a copper plated arc horn on the top side of the movable contact arm opposite the movable contact. The horn extends beyond the movable contact and has an upturned sweep so as to enhance migration of the electrical arc created upon opening of the contacts during a short circuit condition sensed by the breaker. An arc shoe is provided in conjunction with the fixed contact of the breaker as well and cooperates with the arc horn for the same purpose.

REFERENCES:
patent: 4642428 (1987-02-01), Yoshiyasu et al.
patent: 4885441 (1989-12-01), Hisatsune et al.
patent: 5004878 (1991-04-01), Seymour et al.
patent: 5093544 (1992-03-01), Lesslie et al.
patent: 5097104 (1992-03-01), Weichert
patent: 5184099 (1993-02-01), DiMarco et al.
patent: 5493091 (1996-02-01), Devautour et al.
patent: 5589672 (1996-12-01), Uchida et al.

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