... becoming more and more popular in speed control coal motor equipments. 2.Product Advantages l With small starting currentl ... relay outputDisplayDisplay screenSetting frequency, output frequency, current, power, motor speed, load rate, input and output torque, etc.Fault ... under voltage, short circuit, over-current, leakage etc.Explosion-proof marksExd[ib]IAir-cooled methodHeat pipe wind-cooling or heat ...