FIELD: transport.
SUBSTANCE: invention relates to elevator control system. Elevator drive power supply comprises voltage feed input circuit, comparator to compare input voltage with preset threshold, and transformer. Said transformer has one primary with tap and secondary connected with elevator drive. Comparator input is arranged to feed power between primary tap and primary first end when input voltage of preset threshold at input is exceeded and to feed power between primary rap and primary second end when input voltage drops below preset threshold.
EFFECT: improved operating performances.
5 cl, 1 dwg
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