PHASE DIFFERENCE RELAY Russian patent published in 2017 - IPC H01H47/20 

FIELD: electricity.

SUBSTANCE: phase difference relay contains five threshold units, three elements AND, two impulse counters, three elements OR, RS trigger, actuator, clock generator, univibrator, two shapers, two filter-averages, divider, inverter, multiplier on a constant coefficient, algebraic adder.

EFFECT: extending functionality of relay by ensuring the relay response on misalignment of voltage phases and generator with constant control of mains frequencies and generator, improving its accuracy and noise immunity.

2 dwg