... %, 1140V±15% 2) Frequncy :50/60hz 3) Rated Current: 10~800A total 18 specifications 4) Rated Voltage: 280vac, 660vac, 1140vac ... preset low voltage operation, preset both of parameters for soft start and soft stop and switch each other freely, monitor load status ... change to the light load and energy-saving pattern, protective function of testing motor insulation, phase loss, short circuit, protection ...