Preventive maintenance tapping and duty cycle monitor for voltage regulator
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United States of America Patent
Stats
-
Aug 5, 2008
Grant Date -
Feb 9, 2006
app pub date -
Dec 23, 2004
filing date -
Sep 8, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Automatically changing the tap position in a load tap changer includes noting a polarity of a first tap position of a load tap changer. A duration for which one or more consecutive tap positions of the load tap changer collectively have had the noted polarity also is noted. The one or more consecutive tap positions include the first tap position. The duration for which the one or more consecutive tap positions collectively have had the noted polarity is compared to a threshold value. A change is made from the first tap position to a second tap position with a polarity that is different than the noted polarity when the duration for which the one or more consecutive tap positions collectively have had the noted polarity is longer than the threshold value. A change may be made from the second tap position back to the first tap position.
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