FIELD: electricity.
SUBSTANCE: invention is related to line voltage control units in three-phase networks. The claimed device comprises a regulator containing a step voltage control transformer, a measuring transformer to record actual values of voltage subject to regulation, a controller to compare the measured actual voltage with the preset values and depending on the comparison results to generate a command to actuate an electric drive and a step switch of the transformer windings in the same way. According to the invention the primary winding of the transformer coupled through the reverse polarity switch with regulating winding is installed so that it may interact with the winding of the voltage measuring transformer; the device also contains an auxiliary regulator analogical to the first one, at that both regulators are coupled to the three-phase network forming a connection diagram shaped as incomplete triangle.
EFFECT: improvement of operational reliability as well as improvement of maintenance conditions for the claimed device.
2 dwg
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