Ground leakage differential protective apparatus

Details Ground leakage differential protective apparatus Ground leakage differential protective apparatus

1975-02-19

1976-10-05

Moose, Harry

317 27R, H02H 102

Patent

active

RE0289965

ABSTRACT:
A ground leakage differential current protective apparatus of the differential transformer type. An impedance is inserted in the grounded neutral line in series with the transformer and the load. A low impedance ground in the grounded neutral conductor still permits a potential to be developed across the grounded neutral winding so that the differential current required to initiate the tripping action is not substantially increased.

REFERENCES:
patent: 3187225 (1965-06-01), Mayer
patent: 3214638 (1965-10-01), Moser et al.
patent: 3296493 (1967-01-01), Whittaker et al.

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