Zero-phase sequence current detector

Details Zero-phase sequence current detector Zero-phase sequence current detector

1990-04-05

1992-10-27

Trans, Vincent N.

Boots, shoes, and leggings

361 42, 361 87, H02H 316

Patent

active

051595613

ABSTRACT:
A zero-phase sequence current detector have three circular cores provided around three phases overhead lines of AC power lines, three magnetoptic sensors provided on respective cores for detecting currents flowing on respective power lines, and a processing circuit containing an adding circuit for adding outputs of the magnetoptic sensors and a compensation processing circuit for canceling erroneous components due to the differences of the temperature characteristics among the magnetoptic sensors.

REFERENCES:
patent: 3958153 (1976-05-01), Narayan
patent: 4343027 (1982-08-01), Kai
patent: 4529929 (1985-07-01), Berggren
patent: 4589046 (1986-05-01), Takata
patent: 4589048 (1986-05-01), Takata
patent: 5019956 (1991-05-01), Nakayama
Proceedings of the Seventh Texas Conference on Computing Systems, Oct. 31-Nov. 1, 1978; IEEE, New York, US, pp. 2-5-2-9; B. M. Aucoin et al.; "Overcurrent and High Impedance Fault Relaying Using a Microcomputer".

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