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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

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