Why are cylindrical power capacitors more popular?

At present, there are generally three shapes of power capacitors sold in the market: cylindrical, box shaped, and elliptical. Why are cylindrical capacitors more popular? Even some clients specify cylindrical capacitors?

In today's article, the editor mainly introduces the relevant advantages of cylindrical power capacitors that dominate the market. Let's take a look!

Summary of the advantages of cylindrical power capacitors

1. Small size, easy to install

A cylindrical capacitor of the same specifications has a volume about one-third that of a square capacitor. Due to different manufacturing processes, cylindrical capacitors are relatively lightweight, making them not only easy to transport but also convenient to install.

Aluminum integrated seamless shell, with light corrosion resistance and no risk of leakage at the groove connection. In addition, the bottom single fixed bolt design supports 360 ° arbitrary installation.

2. High temperature resistance

Polypropylene metalized film is generally used for cylindrical power capacitors, with a normal high temperature resistance of over 200 ℃ and an overall overload capacity better than square box capacitors.

3. Good heat dissipation

Due to the small volume of cylindrical capacitors, it is also beneficial for the internal space planning of the compensation cabinet, making it easy to install and dissipate heat. The contact area between cylindrical capacitors is relatively small, and the heat dissipation performance is relatively good.

4. Stable performance

The performance of cylindrical capacitors is more stable. Due to the uniform cylindrical stress, when the pressure difference between the inside and outside of the capacitor increases, the shell can divide the pressure to a certain extent, which has stronger impact resistance and can also reduce the risk of capacitor bulging and ignition to a certain extent.

However, it is worth mentioning that there is also an upper limit to the single capacity production of cylindrical power capacitors, and it is generally not recommended to make cylindrical capacitors exceeding 30KVAR.

If the individual capacity of a cylindrical capacitor is too large, the failure rate during operation will increase and the actual service life will be shortened.