PHASE-DIFFERENCE RELAY Russian patent published in 2004 - IPC

FIELD: electrical engineering, applicable in relay-protection devices, for example, as a phase-difference relay of mains and generator voltages.

SUBSTANCE: the phase-difference relay has three threshold unit, two AND gates, two pulse counters, three OR gates, RS-flip-flop, actuating element, clock-pulse generator, one-shot multivibrator, two short-pulse shapers, two filters-averagers, divider, the input of the second threshold unit serves as the power mains inputs, and the input of the one-shot multivibrator serves as the input of the phase-difference relay triggering.

EFFECT: expanded functional potentialities.

2 dwg