Ground fault system and method of detection

Details Ground fault system and method of detection Ground fault system and method of detection

1978-07-31

1980-05-13

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

324 52, 328132, 361 87, H02H 332

Patent

active

042031427

ABSTRACT:
Disclosed is a ground fault detection system utilizing a distributed array of current rate of rise sensors located at and coupled to the various power substations of an underground trolley system. Threshold detectors and logic circuits measure and compare the rate of rise of current at the various substations with preselected threshold values to distinguish ground faults from normal load transients due primarily to locomotive start-up.

REFERENCES:
patent: 3970901 (1976-07-01), Rohr
patent: 3978374 (1976-08-01), Rohr

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