SYNCHRONIZING RELAY Russian patent published in 2004 - IPC

FIELD: electrical engineering; automation of synchronous generator turn-on process.

SUBSTANCE: relay has first inverting amplifier whose input functions as generator voltage input; second inverting amplifier whose input functions as supply voltage input; first and second square-pulse shapers; short-pulse sequence shaper; phase detector; inverting operational amplifier; comparator made in the form of zero-threshold comparator; low-pass filter; monostable multivibrator; clock generator; AND gate; first and second delay circuits; first and second pulse counters; memory register; constant-factor multiplier, and constant-factor shaping unit; output of second pulse counter functions as synchronizing relay output.

EFFECT: enhanced precision.

1 cl, 2 dwg