HPISH17.820 is a new intelligent motor softstarter with the most advanced digital processor which can adjust voltage and limit the electric current. The unique intelligent electronic circuit offers perfect control and protective function: Start linearly with higher speed, starting and stopping control of the pump, presetrun at a low speed(rotating and overturning adjustment in short time of electro-controlling type). Presetable dual start-stop parameter switch freely, can monitorthe load state and realize automatically run with energy-saving or light load mode. The protective funtion of electrical machinery insulating testing, and the protectionof short circuit, phase loss and the electrionic. RS485 with communication interfaceuse modbus/profile protocol that generally realize the long-range control andmonitoring. Can be extensively used in Textile industry, metallurgy industry. Petrochemical industry. Water treatment, shipping industry, medicine, food processing industry, mine industry, and mechanical equipment industry, etc.