Method and apparatus for detecting faults in buried insulated co

Details Method and apparatus for detecting faults in buried insulated co Method and apparatus for detecting faults in buried insulated co

1976-09-08

1977-08-02

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 54, G01R 3108

Patent

active

040399389

ABSTRACT:
An electrical leakage path fault in the insulation of a buried conductor is located by applying, between the conductor and earth, an alternating signal which is then sensed at locations along the path of the conductor. The alternating signal is started at substantially the same phase angle at least once during each interval when it is being sensed. The sensed signal is rectified and divided by two to produce a reference signal which is phase compared with the sensed signal to trace the conductor to the fault.

REFERENCES:
patent: 2789268 (1957-04-01), Bechtel et al.
patent: 3299351 (1967-01-01), Williams
patent: 3792350 (1974-02-01), Bossler et al.
patent: 3860866 (1975-01-01), Dornberger
patent: 3967190 (1976-06-01), Fonge
patent: 3991363 (1976-11-01), Lathrop

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