1)JJ1 series auto-voltage reducing starting control cabinet 2)AC 50Hz 3)CE,CB,ISO9001,14001,IEC 4)OEM JJ1 series auto-voltage reducing starting control cabinet is suitable for three-phase squirrel-cage induction motor of AC 50Hz, rated voltage up to 660V and below, and the capacity 315kW and below, used for infrequent auto step-down starting to reduce the impact fromthe motor starting current on ...