THREE-PHASE ALTERNATING VOLTAGE CORRECTOR Russian patent published in 2019 - IPC G05F1/30 H02M5/12 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used for powering general industrial plants and other electric power consumers with supply voltage of 380/220 V. Three-phase alternating voltage corrector comprises three identical phase correctors, ballast resistor shunted by closed contact of common contactor, control system, each of the phase correctors comprises a measuring transformer with primary, secondary and additional windings, the primary winding of which is connected to the corresponding phase voltage, and secondary winding is connected to control system, power transformer with primary and secondary windings, secondary winding input and output are respectively connected to phase voltage and to load, and primary winding is connected in diagonal formed by closed and open contacts of first and second contactors. Additionally, there is an automatic circuit breaker, the first pole of which connects input of primary winding of one of measuring transformers to phase voltage, at that its additional winding is connected to control system, and the second pole connects three-phase voltage neutral to control system, to outputs of primary windings of measuring transformers, to ballast resistor common for all phase correctors, in each of which there are varistors connected in parallel to primary windings of power transformers.

EFFECT: reduction of weight and dimensions and protection against internal short circuits.

1 cl, 1 dwg