Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Patent
1985-09-06
1988-04-19
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
324520, 340650, G01R 3108, G01R 3300
Patent
active
047392746
ABSTRACT:
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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Cabison Manuel R.
Cox Michael G.
Kimball Dorr
Eisenzopf Reinhard J.
Solis Jose M.
Southern California Edison
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