HVVS series on-load tap-changer is suitable for rated voltage 35 ~ 72.5kV, the maximum rated passing current is three-phase 600A, single-phase 700A, rated frequency is 50 ~ 60Hz three-phase Y connected to the neutral point voltage regulation, three-phase △ connected to the end or middle voltage regulation, single-phase arbitrary connection to the voltage regulation of oil-immersed power transformer.

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.