Jinli’s de-energized tap changer controller is the latest design of the special controller, which can be adjusted by using the up and down buttons on the front panel of the controller. The LED digital tube displays the gear position of the tap changer and the cumulative number of the tap changer actions. The controller has the functions of upper and lower limit gear limit, lifting interlocking, and chain protection with high voltage circuit breaker. The shell uses aluminum alloy material to enhance the shielding electromagnetic interference ability, LED digital tube display.