Due to the large inductive load in industrial enterprises, the power system generally faces reactive power problems and requires the use of power capacitors for reactive power compensation. So, how long is the service life of power capacitors? What are the potential consequences of not replacing power capacitors for a long time? The editor will provide a detailed introduction in this article.
1. Service life of capacitors
Common power capacitors in the market have different service lives depending on their design, materials, and production processes. In an ideal situation, the service life of power capacitors can reach ten or even twenty years or more. However, when power capacitors are actually in operation, they often fail to reach this value. Mainly influenced by the following factors:
① The quality of capacitors. The quality of capacitors is an important factor in determining their service life. Capacitors have poor quality, frequent operational failures, and a service life of generally 1-3 years; High quality power capacitors can operate stably for a long time, with a service life of over 10 years.
② Operating conditions. The operating conditions also have a significant impact on the service life of power capacitors during operation. For example, long-term overvoltage operation Long term overcurrent operation Over temperature operation When there are harmonics in the power grid, the service life of power capacitors will be shortened.
2. The hazards of long-term use of capacitors without replacement
The service life of power capacitors is limited and requires regular replacement. If the capacitor is not replaced for a long time, the capacitance value of the capacitor will decrease and the reactive power compensation effect will be affected. In addition, after the capacitor fails, the power factor will decrease and the enterprise will also be fined by the power bureau.
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