Method and apparatus for monitoring poly-phase currents in poly-

Details Method and apparatus for monitoring poly-phase currents in poly- Method and apparatus for monitoring poly-phase currents in poly-

1978-11-13

1980-12-23

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

With particular system function

340651, 340652, 340658, 340661, 340664, G08B 2300

Patent

active

042413362

ABSTRACT:
A method of and a device for monitoring poly-phase currents in poly-phase equipment, in which a phase signal representative of the current in each phase of the equipment is obtained, the phase signals multiplexed so as to obtain a single multiplexed signal, and the multiplexed signal then processed to extract from it an output signal or signals representative of, for example, overload, unbalance, earth fault or short circuit conditions.

REFERENCES:
patent: 1055018 (1913-03-01), Burnham
patent: 3939460 (1976-02-01), Horn et al.
patent: 4032908 (1977-06-01), Rice et al.
The B. G. Def. Pub.: Gaither IV, et al., Def. Pub. of S.N. 573227 filed 8-18-66, published in 861 06.367, on 4-8-69, Def. Pub. No. T861,017.

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