... in China using inner bypass design. Main Features: 1) 3 Phase power source voltage:400V±15% ,660V±15%, 1140V±15% 2) Frequncy : ... 50/60hz 3) Rated Current: 10~800A total 18 specifications 4) Rated Voltage: 280vac, 660vac, 1140vac 5) Rated ... linearity acceleration start, pump start, pump stop control, preset low voltage operation, preset both of parameters for soft start and soft ...