The main objective of an electric motor drive unit is to drive the connected on-load tap-changer or large de-energized tap-changers to a higher or lower tap of a transformer.
Hitachi Energy tap-changers are paired with robust, dependable motor drives that are configurable to meet a wide range of customer specifications. From modular BUL and versatile BUE for in-tank on-load tap-changers to the digitally controlled SMD with integrated Tap Logic Monitoring System (TLMS) for the type VRLTC tap changer.