Advanced Power System Calculator – PFC, Transformer & Generator Sizing

CircuitSecrets

Professional Power System Calculators

Power Factor Correction

Calculate required capacitor bank size (kVAR).

Load Power (kW)

Existing PF

Desired PF

System Voltage (V)

Frequency 50 Hz60 Hz

Phase Three-PhaseSingle-Phase

Transformer Sizing

Determine appropriate kVA rating based on load and margins.

Total Connected Load (kW)

Load Power Factor

Load Factor

Future Expansion (%)

Safety Margin (%)

System Voltage (V)

System Phase Three-PhaseSingle-Phase

Generator (DG) Sizing

Calculate generator size considering motor starting.

Total Connected Load (kW)

Load Power Factor

Largest Motor (kW)

Starting Method Direct-On-Line (DOL) - 6x FLA Star-Delta - 3x FLA Soft Starter - 2x FLA VFD - 1.5x FLA

Diversity Factor

Future Expansion (%)

Solar Motor Load

Size a solar PV system for motor loads.

Motor Power Rating (kW)

Motor Efficiency

Daily Operating Hours

Solar Irradiance (kWh/m²/day)

System Losses (%)

Inverter Efficiency

Short Circuit Current

Calculate symmetrical short circuit current.

Transformer Rating (kVA)

Secondary Voltage (V)

Transformer Impedance (%)

X/R Ratio

Utility Short Circuit (MVA)

System Phase Three-PhaseSingle-Phase

Disclaimer: These calculators are for estimation purposes only. Results are based on standard engineering formulas and typical assumptions. Always verify calculations with manufacturer data, detailed system studies, and local electrical codes (NEC, IEC, BS, etc.) before implementation.