Arc-quenching device for circuit breakers having...

Details Arc-quenching device for circuit breakers having... Arc-quenching device for circuit breakers having...

2006-07-25

2006-07-25

Donovan, Lincoln (Department: 2832)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Magnetic blowout

C335S016000, C218S147000, C218S156000

Reexamination Certificate

active

07081596

ABSTRACT:
The present invention relates to an arc-quenching device for circuit breakers having double-break contacts for use in low-voltage distribution systems. Provided around a prechamber (41) is a magnetic shield (91) for the purpose of intensifying the magnetic blowing action on an arc formed between the arc guide rails (51, 61) of the prechamber. In addition, a blowing loop (81) is inserted in the arc-quenching circuit and extends in sections parallel to an arc guide rail (61). Prechamber insulation having a bulge constricting the arc area likewise serves the purpose of optimizing the arc run.

REFERENCES:
patent: 4656446 (1987-04-01), Chien et al.
patent: 4743720 (1988-05-01), Takeuchi et al.
patent: 4810841 (1989-03-01), Wolf
patent: 5122625 (1992-06-01), Kobayashi et al.
patent: 5694098 (1997-12-01), Mody et al.
patent: 0 255 016 (1988-02-01), None
patent: 0 649 155 (1995-04-01), None

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