Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Patent
1993-11-03
1995-06-27
Regan, Maura K.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
324522, 324 67, G01R 2726
Patent
active
054282950
ABSTRACT:
Faults in electrical coaxial power cables are detected by transmitting a pulsed signal into the cable at a frequency of 512 Hz at an amplitude of the order of 4000 volts peak-to-peak. The capacitance of the cable is adjusted by a separate capacitive tuning box to generate a parallel resonant condition between the transmitter and the cable. These parameters create a condition in which the resistive current generated by the fault is larger than the capacitive/reactive current per foot of the cable enabling detection of the fault by a manually transported receiver dedicated to the frequency of the transmissions.
REFERENCES:
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IEEE Transactions on Power Apparatus & Systems vol. PAS-99, No. 4 Jul./Aug. 1980 Perry et al.
Ade Stanley G.
Battison Adrian D.
Regan Maura K.
Thrift Murray E.
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