ELECTRIC APPARATUS FOR ELECTRIC POWER
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United States of America Patent
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Issued Date -
Jul 8, 2010
app pub date -
Jun 20, 2008
filing date -
Jul 6, 2007
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Abandoned
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Abstract
A shape of longitudinal section of a side wall of an insulation tube is formed into an arch. With this shape, as compared with a mere cylindrical insulation member, it is possible to elongate a creepage distance without extending a length in an axial direction of the insulation tube (a spatial distance between both conductive members) and to improve the insulation withstanding voltage characteristic against the shunt current. In addition, a surface area on an arch surface becomes large, thereby facilitating heat absorption on an arch surface on an inner peripheral surface side of the side wall and facilitating heat radiation on an arch surface on an outer peripheral surface side of the side wall.
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