DEVICE protect three-phase consumers from input voltage unbalance,

摘要

The invention relates to the field of relay protection and can be used to protect consumers from the three-phase voltage unbalance. Estimated useful model aims to protect consumers of three-phase unbalance the power supply. The stated object is achieved in that the protection device of three-phase consumers unbalance of supply voltages, connected to a three-phase supply with the neutral conductor comprises the source resistor having one end connected to a network phase responsive body, characterized in that in order to increase functionality further introduced three resistors, the first of which one terminal is connected to the source resistor and the second terminal of the second supply phase, a second and a third resistors connected in series, the total point through which the body reacts connected to the zero conductor, the second terminal of the second resistor connected to the common point of the source and the first resistor and the second terminal of the third resistor is connected to the third phase source.