HPS2DN17...950 is new intelligent motor soft starter especially for the heavy duty load motors, it's researched and developed on the basis of original HPS2S, HPS2D/DH 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, preset run at a low speed(rotating and overturning adjustment in short time of electro controlling type). Presetable dual start-stop parameter switch freely, can monitor the load state and realize automatically run with energy-saving or light load mode. The protective function of electrical machinery insulating testing , and the protection of short circuit, phase loss and the electronic. RS485 with communication interface use modbus/profibus protocol that generally realize the longrange control and monitoring. 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.