Circuit breaker arc quenching device with venting structure incl

Details Circuit breaker arc quenching device with venting structure incl Circuit breaker arc quenching device with venting structure incl

1995-05-16

1996-10-29

Scott, J. R.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Magnetic blowout

200306, 218 35, 218 36, 218157, H01H 936, H01H 3353

Patent

active

055698948

ABSTRACT:
An arc quenching device for a circuit breaker having a stationary contact member and a moving contact member includes a magnetic element formed of an arc quenching core and a base plate. The arc quenching core includes a back wall, and two side walls extending from lateral sides of the back wall. The base plate extends substantially perpendicularly from a lower side of the back wall in a direction as in the side walls, and is fixed to the stationary contact member. The base plate includes a U-shaped magnetic driving core situated near a stationary contact point and extending upwardly from the base plate to surround the stationary contact point, and an arc horn integrally formed with the base plate and obliquely extending toward the back wall from a portion near the stationary contact point. Arc formed between the stationary contact member and the moving contact member is moved by magnetic driving force formed by the magnetic driving core to the arc quenching core to be quenched therein through the arc horn.

REFERENCES:
patent: 2446859 (1948-08-01), Traver et al.
patent: 3626127 (1971-12-01), Baldini
patent: 4539451 (1985-09-01), Mori et al.
patent: 4631376 (1986-12-01), Leone
patent: 4743720 (1988-05-01), Takeuchi et al.
patent: 4876424 (1989-10-01), Leone et al.
patent: 5164560 (1992-11-01), Uchida et al.
patent: 5206614 (1993-04-01), Carothers

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