Circuit breaker magnetic blowout arc extinguishing device with arc runner features
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United States of America Patent
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-
Jun 23, 1998
Grant Date -
N/A
app pub date -
Apr 16, 1996
filing date -
Apr 28, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided an acr extinguishing device of a circuit breaker which closes and opens an electric line, one of two contact parts being fixed to a base part. The arc extinguishing device includes an arc runner formed of an electrically conductive member and arranged on an outer circumference of the above one of the two contact parts. The arc extinguishing device moves, to the arc runner, an arc occurring when a contact made by the two contact parts is opened whereby the arc is extinguished. The arc runner has a cylindrical shape and includes a rising portion formed on an entire inner circumference of the cylindrical shape. A slant angle of the rising portion obtained on a depth side thereof is greater than another slant angle thereof obtained on a front side thereof.
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