STANDALONE SELF-POWERED NUMERICALLY CONTROLLED RELAY Russian patent published in 2012 - IPC H02H3/08 

FIELD: electricity.

SUBSTANCE: relay contains: full-wave bridge rectifier for rectification of current from at least one current sensor to ensure power supply; a capacitor for power supply sustenance (the three phases connected parallel to the capacitor) the first line stabiliser for the capacitor voltage reduction from the first voltage to the second voltage at the first stage (the second voltage delivered as adjusted voltage to the current perception analogue circuit, to the shutdown mechanism coil energy reservoir and to the energy accumulator for the flag operation) the second line stabiliser for reduction of at least either of the first voltage and the second voltage to the third voltage at the second stage (the third voltage delivered to the microcontroller) and a shunt connected in-series to the sensor current path for conversion of the current signal to a voltage signal; and a voltage divisor and a device for suppressing the current sensor peaks for division of the voltage signal and for delivery of conditional current by way of a voltage signal to the microcontroller.

EFFECT: enhancement of reliability and operation accuracy of the relay.

20 cl, 7 dwg