Water Pump: with the help of water pump's control function to reduce the water- hammering phenomenon when switching on and cutting off, and save the cost of system maintenance.Ball Mill: by means of double slopes voltage starting to reduce the abrasion of gear torque and the maintenance workload, economize time and save cost.Fan: soft starter replaced the traditional starter to reduce strap fretting and machine impact, save the cost of maintenance.Compressor: make use of the current limiting starting or double slopes starting to realize smooth starting, reduce motor heating to lengthen its service life.Crusher: make use of locked rotor and swift protection to avoid mechanical failure or block, which will cause electromotor superheating to result in burning.Conveying Machinery: running by soft starting and presetting at low speed to realize the smooth and gradual process producing area:China