FIELD: electrical engineering.
SUBSTANCE: novelty is that one more secondary winding is proposed to be introduced in adjustable-voltage transformer set that has three-phase traction transformer incorporating primary winding connected to supply mains and secondary winding whose phase windings are interconnected and are provided with three leads of which two ones are designed for connection to contact system and third one, to traction rail; it also has voltage booster whose primary winding leads are connected to phase b leads of three-phase traction transformer secondary winding and its secondary winding is inserted between starting lead of phase a winding and first section of contact system; additional secondary winding is proposed to be inserted between phase c leads and second section of contact system; each secondary winding of voltage booster is proposed to be provided with voltage regulator.
EFFECT: enhanced quality of electrical energy complying with specified requirements due to minimizing equalizing current occurring in traction network.
1 cl, 1 dwg
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