一． 工频熔铁炉  
容量（t）             功率(kw)                                    
1．5               450                       
3                 750                       
5                 1000                      
10                1500                      
20                2500                      
30                3000                      

二． 中频熔钢炉  
容量（t）             功率(kw)          频率(Hz)       
0.1                100             2500        
0.2                160             2500        
0.5                350             1000        
1                   600             1000        
2                   1000            500         
5                   1500            500         
10                  2500            200         
20                  4800            200