Troubleshooting of induction furnace 5

Fault phenomenon: there is no response when the equipment is started. After observation, the phase missing indicator on the control circuit board is on.

Cause of failure: fast fuse is burnt out. In general, fast fuses have fuse indication, which can be observed to judge whether the fuse is burnt out. But sometimes, due to the long service time or quality reasons of fast fuses, the indication is not indicated or the indication is not clear, so it needs to be measured with a multimeter after power failure.

The treatment method is: replace the fast fuse and analyze the cause of burnout. Generally, there are four reasons for burning fast fuse

A. the operation of induction furnace under the condition of high power and high current for a long time results in the heating of fast fuse and the hot melting of fuse core;

B. short circuit of rectifier load or intermediate frequency load, resulting in instantaneous large current impact, burning fast fuse, and checking its load circuit;

C. if the fault of rectifier control circuit causes the impact of instantaneous large current, the rectifier circuit should be checked

D. if the contact of the master switch is burnt out or there is a phase loss fault in the front power supply system, use the AC voltage of the multimeter to measure the line voltage of each level and judge the fault location.

Yiphee Electric Furnace Co.,Ltd specializes in producing induction smelting furnace.Tel(WhatsApp):+86-13450756789, yiphee@yiphee.cn