HV1 series on-load tap-changer is suitable for rated voltage 35 ~ 110kV, the maximum rated passing current is three-phase 200A, 350A, 500A, single-phase 200A, 350A, 500A, 700A, rated frequency is 50 ~ 60Hz three-phase Y connected to the neutral point voltage regulation, three-phase △ connected end or middle voltage regulation, Oil-immersed power transformer with single-phase arbitrary connection for voltage regulation.

The system product is a composite structure, with tap selector and switch function, without interrupting the load current to change the position of the transformer coil tap.