Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Patent
1988-08-22
1989-05-30
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
324509, 324528, 324543, 324650, G01R 3108, G01R 3110
Patent
active
048354783
ABSTRACT:
An acoustic detection method and apparatus includes a source of high voltage pulses to be applied to an underground cable suspected of having a ground fault. As the pulses encounter the fault, acoustic energy is generated which may be sensed by a pair of transducers located along the path of the cable. The transducers are connected to signal processing circuitry which provides a display signal indicating which of the two transducers lies closer to the fault. The transducers are moved along the path of the cable in the direction indicated and the test is repeated until the fault is indicated as lying in the opposite direction. Thereafter the transducer are moved in the opposite direction in a shorter increment. This procedure is repeated until the direction to the fault changes each time the transducers are moved. The fault then lies midway between the midpoints of each of the two final transducer positions.
REFERENCES:
patent: 3264864 (1966-08-01), Reid et al.
patent: 3838593 (1974-10-01), Thompson
patent: 4459851 (1984-07-01), Crostack
Haddon Merrill K.
Moulton Clifford H.
Eisenzopf Reinhard J.
Harvey Jack B.
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