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Power Factor Correction Calculation
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Follow the Steps Below to Calculate the Power Factor Correction required for your installation.
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Click-On Cells with Blue Text to Modify Values, Results will be Displayed in Green
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Step 1. Calculate Actual Load (kW)
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(Load) Power kW = Volts V x √3 x Current I x Power factor Pf
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400
Nominal Voltage (V)
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Non-Corrected Load (kVA)
692.81000
Non-Corrected Current (Amps)
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Actual Load (kW)
415.70.600
Non-Corrected Power Factor (CosΦ)
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Figures for Current (Amps) and Power Factor (CosØ) can be either Measured or Calculated
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Step 2. Calculate Required Power Factor Correction (kVAr)
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Power Factor Correction kVAr = Power kW (TanΦi - TanΦd)
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Φi = Cosˉ¹ Initial Power Factor Pf
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Φd = Cosˉ¹ required Power Factor Pf
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415.7
Actual Load (kW)
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Correction Required (kVAr)
417.60.600
Non-Corrected Power Factor (CosΦ)
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0.950
Required Power Factor (CosΦ)
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Step 3. Calculate Actual Power Factor Correction (kAVr)
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 Actual Power Factor Correction Pf = Cos (Tanˉ¹ (TanΦi - Correction kVAr)
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Power kW
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400
Correction Applied (kVAr)
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Corrected Power Factor (CosΦ)
0.938415.7
Original Load (kW)
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0.600
Non-Corrected Power Factor (CosΦ)
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Typical Power Factor Correction available in multiples of 25kVAR's, for further details
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please Contact Blakley Electrics Technical Department.
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Energy Savings for Above Power Factor Correction
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Initial Current
1000Amps
Original Load
693kVA
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Corrected Current
640Amps
Corrected Load
443kVA
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Reduction in Current
360Amps
Reduction in Load
249kVA
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Annual CO2 Savings*
62800kg CO2
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*C02 Savings based on 500 hours per month.
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Click to View Product Data Sheet
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Blakley calculator (version 2.0) Blakley Electrics Ltd.
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