What is the function of the expansion cover of the power capacitor?

The expansion lid(waist line) of the power capacitor mainly has the following functions:

1. Safety protection: prevent the capacitor from exploding in the event of overvoltage or failure, and allow the internal gas to be released safely.

2. Structural strength: Enhance the overall strength of the capacitor to ensure good sealing under high temperature and pressure.

3. Temperature and pressure regulation: Adjust according to internal gas changes to ensure safe operation.

4. Damping effect: reduce the impact of external shocks on internal components and improve stability.

5. When the pressure increases, the expansion waist line will be stretched, the explosion-proof pin will be pulled off, and the capacitor will be powered off to prevent further damage.
6. The possibility of explosion of power capacitors with expansion waistline can be reduced 50%.