DK(H)(W) series Low-volt.(Marine)(sewage)Electric Motor Switchboard is suitable to control the non-frequent phase starting and stopping of marine three phase sequiral-cage induction motor with rated freqnency 50Hz(60Hz),rated power from 11kW to 315kW.The self induction reduced voltage. starting is used to reduce the influence of starting current to motor and power system. For the motor, it has the protection of overload, phase breaking, short circuit and so on ,as sell as overload of starting time For other special requirment, we can negotiate settlement.