Low-voltage power capacitors are the key equipment in distribution reactive power compensation, and power capacitors are a very “soft” component, which will reduce the service life of power capacitors under the influence of environmental conditions. Here is a summary of several factors that affect the life of low-voltage power capacitors.
1. temperature. The capacitor will generate heat during operation. Assuming that the site is not well ventilated and the ambient temperature is high, the life of the capacitor will be greatly reduced. The calculation indicates that if the temperature of the capacitor itself is at 55℃ for a long time, the service life will be shortened by 2/ 3 or more.
2. Operating voltage. The capacitor itself has an extra voltage, assuming that the operating voltage is higher than the extra voltage for a long time will also affect the service life of the capacitor.
3. harmonic. Harmonics will cause distortion of voltage and current in the line, and then affect the service life of the capacitor.
In addition to the above points, there are many factors that affect the life of the capacitor, such as the quality of the capacitor itself, the lack of system maintenance and maintenance, and even the loosening of the screw may cause the capacitor to be burned and so on.