An analysis of circuit design solutions of single-phase voltage control relays for household consumers

This paper pays attention to a circuit design solutions of single-phase voltage control relays for protection of household consumers of electrical energy from unacceptable voltage deviations within power supply network using the examples of some manufacturers. An overview and description of electrical drawings of analog voltage control relays, based on comparators, and digital ones, as a modern version on the basis of microcontrollers, are carried. The conducted overview and analysis systematizes information on the design, technical and functional features of the electrical circuits and components of the mentioned relays and demonstrates the prospects for development of voltage relay circuitry. The electrical drawings have been illustrated by the author, and the algorithm of their operation is described in detail. A generalization and conclusion are made concerning the components of the functional circuits in the voltage control relay for protection of household consumers.