Power Factor Correction Capacitor Sizing Calculator
Industrial energy management, eliminating utility low-PF surcharge fees. Determines the exact capacitor bank size in kVAR required to improve factory power factor from an uncorrected value (e.g. 0.72) to target (e.g. 0.95).
Step-by-Step Derivation ▼ Show Steps
Calculations adhere to standard electrical engineering physics and National Electrical Code (NFPA 70) regulations.
Engineering Principles & Calculations
This calculator uses the exact mathematical relationships between Current Plant Load (kW), Initial Power Factor (PF1), Target Power Factor (PF2) to determine Required Capacitor Bank (kVAR), Current Reduction (Amps), Estimated Annual Utility Penalty Savings ($). In practical installations, factors such as ambient raceway temperature, harmonic distortion, duty cycle continuous operation, and conductor impedance must be accounted for by a certified electrician.
Determines the exact capacitor bank size in kVAR required to improve factory power factor from an uncorrected value (e.g. 0.72) to target (e.g. 0.95).
Typical Application & Industry Guidelines
Industrial energy management, eliminating utility low-PF surcharge fees.
Power Factor Correction Capacitor Sizing Calculator Benchmark Lookup Table
| Plant Load | kVAR to reach 0.95 (from 0.70 PF) | kVAR to reach 0.95 (from 0.75 PF) | kVAR to reach 0.95 (from 0.80 PF) |
|---|---|---|---|
| 50 kW | 34.5 kVAR | 27.5 kVAR | 21.1 kVAR |
| 100 kW | 69.1 kVAR | 55.1 kVAR | 42.1 kVAR |
| 250 kW | 172.7 kVAR | 137.7 kVAR | 105.3 kVAR |
| 500 kW | 345.5 kVAR | 275.4 kVAR | 210.5 kVAR |
| 1,000 kW | 690.9 kVAR | 550.8 kVAR | 421.1 kVAR |