The installed capacity of cement plants is relatively large. According to different production scales, the 2000t/d～5000t/d production line generally has an installed capacity of 15000-30000kW, ranking first in several major industries such as chemical industry, petroleum, metallurgy, and building materials. Cement factories generally have one 110/6 (10) kV total step-down substation, 2-4 6 (10) kV power distribution stations, 5-7 6 (10)/0.4 kV power rooms, and the main production process flow Including crushing/pre-homogenization, raw meal preparation, preheating decomposition, cement clinker firing, cement grinding, etc., using a large number of high and low voltage motors such as crushing, vertical milling, exhaust, and conveying.