Why do the heating capacitors in medium-frequency induction furnaces frequently burn out?

1.The main reasons for this are as follows: 1. Lack of cooling water. During prolonged use of the medium-frequency induction furnace, scale may build up in the cooling pipes of the capacitor, or the water inlet system may be blocked by impurities, leading to overheating and burnout of the heating capacitor. Therefore, the flow rate of the cooling water for the heating capacitor should be closely monitored during operation, and appropriate measures should be taken if any abnormalities are detected.

2. If the medium-frequency voltage exceeds the standard, prolonged use of the medium-frequency induction furnace with the voltage set too high, exceeding the rated voltage that the heating capacitor can withstand (common specifications include 750V, 1200V, etc.), will lead to overvoltage breakdown of the heating capacitor. If this occurs, the medium-frequency voltage needs to be reduced or a heating capacitor with a higher voltage rating needs to be installed.

3. If the heating capacitor experiences insulation failure during furnace operation, it may lead to the capacitor cathode grounding, which in turn can cause breakdown of the capacitor casing. If this occurs, the insulation of the capacitor cabinet needs to be re-treated.