CIRCUIT BREAKER
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United States of America Patent
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-
N/A
Issued Date -
Oct 31, 2013
app pub date -
Feb 8, 2012
filing date -
May 23, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A circuit breaker includes a fixed contact having a fixed contact point; a movable contact having a movable contact point contacting with the fixed contact point; and an arc extinguishing device housed in a main body case. In the arc extinguishing device, a plurality of magnetic grids, each having a pair of grid leg portions, is disposed in layer form, and an arc generated between the fixed contact point and the movable contact point at a time of an opening operation is drawn into the magnetic grids and extinguished. A magnetic flux is generated between the pairs of grid leg portions configuring the arc extinguishing device in a direction perpendicular to the arc generated between the fixed contact point and the movable contact point, and permanent magnets and a permanent magnet holding member are disposed therein.
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