RELAY Russian patent published in 2016 - IPC H01H47/00 

FIELD: electricity.

SUBSTANCE: relay contains a frequency dependable element, two summing devices, an algebraic adder, two executing elements, thirteen limit blocks, four AND elements, an OR element, two reversible counters, a clock generator, a pulse frequency divider, an univibrator.

EFFECT: expansion of functional abilities by the assurance of the simultaneous execution of functions of the frequency relay and generator phase relay relatively to the frequency and phase of the network voltage.

2 dwg