Detail The specification of the product is rated voltage 35KV(highest voltage for equipment 40.5 kV) and below, rated current 400A and below. The maximum step voltage for 10KV voltage(highest voltage for equipment 12 kV) class is 1000V. This kind of on-load tap changer has the merits of advanced structure, operating reliably, long useful life and maintenance freely, It is suitable for oil-immersed three-phases transformer with frequency 50Hz, highest voltage for equipment 40.5KV and below and rated current under 400A and below.