RESISTANCE RELAY Russian patent published in 2004 - IPC

FIELD: electrical engineering. SUBSTANCE: proposed resistance relay that can be used as remote quadrangular-characteristic protective gear depending for its operation on phase comparison of four quantities in single comparison circuit has final element, compared voltages converter built around first, second, third, and fourth comparators, first AND gate, second AND gate, first OR gate, third AND gate, subtraction unit, first and second counters, two-way limiter, adder, nonrecursive filter, fifth comparator, second OR gate, monostable multivibrator, clock generator, and compared voltages shaping unit. EFFECT: enhanced precision and noise immunity. 1 cl, 2 dwg