FREQUENCY-PHASE RELAY Russian patent published in 2018 - IPC H01H47/20 

FIELD: electricity.

SUBSTANCE: frequency-phase relay contains a frequency-dependent element, an adder, two actuators, six threshold units, four AND elements, a reversing counter, three clock generators, a pulse frequency divider, a single-oscillator, three RS-triggers, two short pulse formers, two OR elements, two pulse counters, an averaging filter.

EFFECT: application of the invention allows to extend the functionality of the frequency relay due to providing the relay response to the generator frequency deviation from the nominal, and to the deviation of its phase relative to the network phase, and to exclude the effect of short-term failures of the generator frequency relative to the network frequency.

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