Ground fault indicator

Details Ground fault indicator Ground fault indicator

1980-09-25

1983-11-08

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

324127, 324133, 336174, 336223, 340664, 335204, G08B 2100

Patent

active

044145438

ABSTRACT:
A ground fault indicator for a multi-phase power distribution system includes a split-core magnetic pole assembly having a gap within which is developed a magnetic flux representative of the vector sum of the currents in the individual phase conductors of the system. A magnetic reed switch positioned within the gap responds to the summation current in the gap to trip an indicating circuit in a remotely mounted indicating module in the event of a ground fault.

REFERENCES:
patent: 1735092 (1929-11-01), Roller
patent: 3392326 (1968-07-01), Lamberton
patent: 3708724 (1973-01-01), Schweitzer, Jr.
patent: 3771049 (1973-11-01), Piccione
patent: 3876911 (1975-04-01), Schweitzer
patent: 3978400 (1976-08-01), Pettit
patent: 4126857 (1978-11-01), Lancia et al.

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