Is the actual service life of power capacitors related to the selection?

Customers often ask: How long do reactive power compensation capacitors usually last? Our capacitor has been in use for 3 to 4 years, does it need to be replaced? Whether a capacitor needs to be replaced depends on whether it is currently functional or not; how many years a capacitor's actual service life is is affected by a variety of factors: some good capacitors can last 5~10 years, while some poor quality capacitors have a Z-long service life of only a few months. Many people believe that the main factor affecting the actual service life of a power capacitor is whether it is properly selected? What is the actual situation? What are the factors that affect the service life of capacitors? Come and have a look! Does the correct selection of power capacitors affect their service life? Only the correct selection of power capacitors can better function for reactive power compensation.

In general, the rated voltage of power capacitors must be higher than the system voltage, and the selection of grouping and capacity should be made according to the actual situation, otherwise it is likely to lead to the failure of capacitors and shorten their actual service life. In addition, when power capacitors are used together with reactors, the capacitor reactance and reactance rate must be properly selected, otherwise it will also affect the capacitor life. For example, when the reactance is added to the power capacitor bank, the end voltage will be increased to a certain extent, and the rated voltage of the capacitor cannot be selected to 400V at this time.

What are the factors affecting the actual service life of capacitors?

1、The quality of the power capacitor itself. The materials and production process used in the capacitor itself affect its quality. Generally speaking, products with low price have some disadvantages, and their service life is usually short. 2、Using environment. The operating environment of the power capacitor bank also affects the service life of the product. If there is conductive dust or particularly harsh environment in the environment, it will also shorten the service life of the capacitor. 3、Operating temperature and ambient temperature are too high. If the capacitor itself has no self-cut-off protection function such as over-current and over-voltage, when the operating temperature or ambient temperature is too high, it will cause the capacitor medium, thus reducing its actual service life.