Polyphase fault current flow detecting and resetting means

Details Polyphase fault current flow detecting and resetting means Polyphase fault current flow detecting and resetting means

1975-04-10

1976-08-10

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonquantitative

317 23, 324 51, 340253A, G01R 1916, G01R 3102

Patent

active

039744469

ABSTRACT:
Detection of fault current flow in any conductor of a polyphase alternating current system is provided by a fault responsive device that is reset only when normal current flows in each conductor. A reed relay is latched in operated condition on the occurrence of a fault and is unlatched by application of a direct current source.

REFERENCES:
patent: 3524133 (1970-08-01), Arndt
patent: 3715742 (1973-02-01), Schweitzer
patent: 3771049 (1973-11-01), Piccione
patent: 3816816 (1974-06-01), Schweitzer
patent: 3866197 (1975-02-01), Schweitzer
patent: 3870928 (1975-03-01), Allen
patent: 3875464 (1975-04-01), Gary et al.

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