SPECIFICATION SHEET • SI METRIC
CAT: ELECTRICAL-ENERGY
Power Factor Correction & Capacitor Sizing
Estimate reactive compensation, apparent-power reduction, and three-phase current before and after improving a plant power factor.
💡 Engineering Knowledge PrimerPower-factor correction reduces reactive current so the same real load uses less apparent capacity. This screen estimates the kVAR difference between the measured and target power factors for a balanced three-phase load.
OPERATING LIMITS — Reactive-compensation calculation only; verify harmonics, resonance, capacitor steps, switching, protection, utility requirements, and tariff treatment before installation.
INPUT DESIGN PARAMETERS (SI)
kW
1
1
V
CALCULATED SPECIFICATION OUTPUT
Estimated Capacitor Compensation
⚡317.6 kVAR
| Apparent Power Before Correction | 694.4 kVA |
| Apparent Power After Correction | 526.3 kVA |
| Line Current Before Correction | 966.1 A |
| Line Current After Correction | 732.2 A |
| Correction Assessment | Compensation indicated Status |
Related planning checklists
This calculator appears in the following engineering planning checklists:
Industrial Power Factor & Demand Optimization
Electrical Engineer1. Three-Phase Electrical Power2. Power Factor Correction & Capacitor Sizing3. Transformer kVA Rating & Load Sizing (IEC 60076)
Technical Methodology & Engineering Principles
GOVERNING EQUATION
Q compensation (kVAR) = P × [tan(cos⁻¹(PF measured)) − tan(cos⁻¹(PF target))]
S (kVA) = P / PF
I (A) = P × 1000 / (√3 × V × PF)
Assumptions & Scope
Balanced three-phase sinusoidal load; constant real power; target power factor is displacement PF; no harmonic-current, resonance, switching-step, protection, tariff, or utility interconnection checks.
Operating Range & Boundary
Real power and voltage must be positive; both power-factor inputs must be greater than 0 and no greater than 1.