Multipolar circuit breaker
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United States of America Patent
Stats
-
Jan 21, 2003
Grant Date -
May 2, 2002
app pub date -
Oct 30, 2001
filing date -
Oct 31, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A multipolar circuit breaker of great breaking capacity prevents arc gas from blowing out from the side at the time of cutting off a short-circuit current. A stationary contact and a movable contact generating arcs when a short-circuit current is cut off, and an arc extinguisher extinguishing the arc are stored in an arc extinguisher casing. By forming the ceiling, the bottom and the sidewalls connecting the ceiling and the bottom of the arc extinguisher casing in continuity so that no gap is formed by an outward internal pressure, blow out of arc gas from the sidewall portion is suppressed.
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