Detection of arcing faults in polyphase electric machines
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United States of America Patent
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Oct 26, 1982
Grant Date -
N/A
app pub date -
Aug 26, 1980
filing date -
Aug 26, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method is provided for detecting the existence of arcing faults in the phase windings of a polyphase electric machine and for simultaneously identifying the specific phase winding in which the arcing fault exists. Arcing faults in phase windings of electric machines cause high frequency currents to flow through all phase windings of the machine with a drastically higher magnitude in the phase winding in which the arcing fault exists. These currents can thus be measured to determine the existence of the arcing fault and selectively determine which phase is affected.
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