Electrified oil supplementing device applied to mutual inductor

The utility model utility relates to the technical field of transformer substation oil recharging, and provides a charged oil recharging device applied to a mutual inductor, comprising a vacuum oil recharging machine which is provided with an oil return port, an oil recharging port and an emptying port; the oil supplementing connecting piece comprises a pipe body and a valve arranged on the pipe body, and the pipe body is provided with an oil inlet, an oil outlet and an oil supplementing connecting port which are communicated with the interior of the pipe body; the inlet end of the oil supplementing pipe is communicated with the oil supplementing opening or the emptying opening, and the outlet end of the oil supplementing pipe is communicated with the oil inlet. The oil supplementing connecting piece has the advantages that the one-way valve is arranged on the oil supplementing pipe, so that insulating oil in the oil supplementing connecting piece cannot flow back to the oil supplementing opening of the vacuu