Current leakage detector of construction machine
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United States of America Patent
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Nov 12, 2013
Grant Date -
Mar 10, 2011
app pub date -
Aug 20, 2010
filing date -
Sep 7, 2009
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Abstract
An inverter is forcibly operated to supply electric power to a motor, thereby performing detection of a current leakage, on condition that a power-on operation is performed, that the motor is stopped, and that determination as to occurrence or non-occurrence of the current leakage has not yet been made even once after the power-on.
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