Dc ground fault detection

Details Dc ground fault detection Dc ground fault detection

H - Electricity

02

H

324/58.4

H02H 3/17 (2006.01) G01R 31/02 (2006.01)

Patent

CA 1263706

ABSTRACT DC GROUND FAULT DETECTION Apparatus for the detection of ground leakage in a normally ungrounded DC system includes a DC power supply and conductors from the supply for supplying power to a load connected to the DC system. There is an indicator connected between the DC system and a ground point such that a ground leakage in the system closes a circuit to activate the indicator. With such activation, a pulser periodically interrupts the circuit to effectively generate an interrupted ground fault signal. Such signal is detected by a sensor located relative to the DC system such that an interrupted ground signal detected by the sensor locates the ground fault. Noise introduced into the pulse signal by the periodic interruption of the circuit during the ground fault occurrence is suppressed by the sensor means.

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