What is the service life of power capacitors?

The service life of power capacitors generally refers to the service life or the storage period. In most cases, it is more inclined to the service life because warehouse power capacitors can be stored for several years or even ten years as long as the environment is suitable. The service life of power capacitors is different from a few months or years. So, what is the service life of power capacitors?

Under normal use, the service life of power capacitors can reach five years or more. However, most power capacitors that operate normally are used in the third or second year. Enterprises will determine whether replacement is necessary, not because the power capacitor is damaged, but because of losses. No matter how properly power capacitors are used, they will cause certain losses to them every year. This loss parameter is generally around 10%. After two to three years of use, the parameters of the power capacitor will be different from the originally planned parameters. At this point, it is necessary to determine whether replacement is necessary. If not needed, continue to use. If the desired effect cannot be achieved, it needs to be replaced.

There are many factors involved in the short service life of power capacitors under abnormal use. The loss of power capacitors is caused by the withstand voltage lighting of power capacitors due to the current. If carried out under the required withstand voltage of power capacitors, the loss will not accelerate. If it exceeds the withstand voltage operation, the service life of power capacitors will be shortened due to the load. Similarly, power capacitors also have an impact on the temperature of the usage environment, and overheating or overcooling can accelerate the service life of power capacitors.

If the quality is low or refurbished (with excessive replacement losses), this type of power capacitor is no longer a problem of service life and begins to pose safety risks. Therefore, in terms of the service life of power capacitors, as long as they operate normally for 3-5 years without any problems, if the parameters do not meet the standards, they should be replaced in advance.