Applications of Fuji Frequency Converter in Production Line of Cold-rolled Steel

In the paper,it is mainly elaborated that with the applications of Fuji frequency converter instead of original contactor in the electrical system for production line of cold-rolled deformed bar in Chifeng Yuanlian Iron and Steel Co.Ltd.,the circuit of the production line was simplified,control was accurate,the time for field staff to handle equipment failures and maintain equipment was shortened as well as the equipment failures became fewer so that the operating efficiency of machines was improved obviously.Moreover,it is proved that the expenses of electric accessory were saved and costs of production were reduced so that the economic benefits were increased.