VOLTAGE RELAY Russian patent published in 1999 - IPC

Abstract RU 2136098 C1

FIELD: relay protection, in particular, for fast protection of high-voltage electric motors. SUBSTANCE: device provides recognition of feed effect which is caused by decreased speed of voltage drop on power supply lines due to their feeding by electric motors in course of their stop way. Goal of invention is achieved by introduced pulse generator, time delay gate, three pulse gates with self-lock, three gates, delay gate, two reverse binary counters, two memory registers, three digital comparators, 2 AND gate and 2 OR gate. EFFECT: feed effect recognition. 2 dwg

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RU 2 136 098 C1

Authors

Korobejnikov B.A.

Morozov I.A.

Dates

1999-08-27—Published

1997-04-02—Filed