Maintenance of Power Capacitor

 

The following points to be noted for maintenance of capacitor.

• Check tightness of connection periodically
• Use harmonics analyzer for analysis of harmonics due to non – linear load
• If non – linear load increase significantly, harmonic study is done
• If harmonics are present, de-tuned capacitor banks ( reactor ) must be considered
• Take current reading twice in a year and compare with normal current
• Check discharge resistors and its function by ( 1 ) Increasing the power and then decrease ( 2 )
• Check the temperature of capacitor after continuous operation when the capacitors have been switched off. 
• If the temperature of the single capacitor bank exceed beyond its limit, replace single capacitor bank