METHOD AND APPARATUS FOR GROUND FAULT DETECTION
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United States of America Patent
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Issued Date -
Jun 18, 2015
app pub date -
Dec 18, 2013
filing date -
Dec 18, 2013
priority date (Note) -
Abandoned
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Abstract
Method and apparatus for determining a ground fault impedance. In one embodiment the apparatus comprises a voltage divider and a ground fault detection module for (i) determining a first voltage based on at least one voltage measurement of the voltage divider while the voltage divider is coupled between the first AC line and the DC line; (ii) determining a second voltage based on at least one voltage measurement of the voltage divider while the voltage divider is coupled between the second AC line and the DC line; (iii) determining a differential voltage based on at least one voltage measurement between the first AC line and the second AC line; and (iv) computing the ground fault impedance based on the first voltage, the second voltage, and the differential voltage.
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