中频电炉不能正常启动可能有多种因素构成，出现这种情况可按照以下步骤逐步检查排除：
The failure of the medium frequency electric furnace to start normally may be caused by various factors, and this situation can be gradually checked and eliminated according to the following steps:
1、首先确认电源开关及控制开关都已经打开；
1. Firstly, confirm that both the power switch and control switch have been turned on;
2、打开控制电源后有无报警并及时排除故障；
2. Check if there is an alarm after turning on the control power and promptly eliminate the fault;
3、中频变压器出现开路或匝间短路以及接触不良的现象；
3. The phenomenon of open circuit or inter turn short circuit and poor contact in the intermediate frequency transformer;
4、中频电压比直流电压即β角太小，这时要适当加大β角。
4. The ratio of intermediate frequency voltage to direct current voltage is β The angle is too small, so it needs to be appropriately increased at this time β Corner.
5、检查逆变KK可控硅和整流KP可控硅是否有损坏现象：
5. Check if the inverter KK thyristor and rectifier KP thyristor are damaged:
6、检查电热电容有无击穿：
6. Check for breakdown of the electric heating capacitor:
7、水冷电缆是否断路或者短路：
7. Is the water-cooled cable open or short circuited
8、中频炉炉体感应圈其匝间是否有金属而引其匝间短路；
8. Is there any metal between the turns of the induction coil of the intermediate frequency furnace body, which leads to a short circuit between the turns;
9、炉衬是否有穿炉绝缘不良漏电的现象。
9. Is there any phenomenon of poor insulation and leakage through the furnace lining.