Fault detection circuit for use in determining the existence of

Details Fault detection circuit for use in determining the existence of Fault detection circuit for use in determining the existence of

1991-05-20

1992-12-01

Strecker, Gerard R.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of electrically operated apparatus

324510, 324158MG, 340661, G01R 3100

Patent

active

051682362

ABSTRACT:
A fault detection circuit for a plurality of three-phase loads uses a wye-connected reference load as a benchmark. The voltages at the centerpoints of the loads to be monitored are monitored and the largest monitored voltage is identified. This largest voltage is compared with the voltage of the centerpoint of the reference load. The comparison is affected by faults which do not affect all loads equally (as by a short or open in one of the phases of one of the loads) and is unaffected by faults which do affect all loads equally (as by changes in voltage of one of the phases of the source).

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