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SALES ADVICE +64 7 3470646      EMAIL

Power Factor Correction Size Calculator

To Use Calculator:

  • The calculator will calculate the site KW and use a multiplier to work out the size of capacitor bank required.
  • The nominal running current will help you to size the cables needing to feed the unit using GenCalc or similar.
  • The Protection device must be able to handle the full load running current of the unit as well as the inrush of large correction steps being switched in.
  • Round this up to the nearest circuit breaker size to specify the rating of the feeder circuit breaker.    
 Voltage (V):   Enter the average site 3 phase voltage
Current of site or equipment (A):    Enter the normal full load current
 Power factor before correction (Cosf)   Enter the current, or estimated, uncorrected power factor figure in the 'Power factor before correction' box.
Target power factor (Cosf)   Enter the target power factor 
      (most power companies charge for power factor worse that 0.95, but it is dangerous to aim too close to unity (1.0), so 0.97-0.98 would be sensible).