FIELD: measurement technology. SUBSTANCE: device has three terminals for connection to network phase poles, terminal for connection to zero pole, rectifier (which has thyristor, two diodes, two resistors and three-position control switch), relay, buffer diode, isolation diode, thyristor, phase-shifting unit, two ballast resistors, relay break contact, relay make contacts and actuating member with corresponding couplings. EFFECT: enhanced reliability of control. 4 dwg
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