⚡ Electrical Engineering

Power Parameter Calculator

Calculate apparent power, active power, reactive power, impedance, and current for single-phase and three-phase AC systems. Supports instrument selection recommendations based on voltage class.

Single / Three Phase Power Factor kW / kVA / kVar Meter Selection

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Input Parameters

System Configuration

System Type

Calculation Mode

Electrical Parameters

Voltage (V)

Current (A)

Active Power (kW)

Power Factor (0–1) (optional)

Leave blank to use 1.0 (pure resistive)

Frequency (Hz)

Load Type

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Calculation Results

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Enter voltage and current values to calculate power parameters.

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Instrument Recommendation

📐 Key Formulas

Single-phase: S = V × I
Three-phase: S = √3 × V × I
Active Power: P = S × pf
Reactive Power: Q = √(S²−P²)
Impedance: Z = V / I (single) or V / (√3 × I) (three)

⚠️ Assumptions

Voltage is line-to-neutral for single-phase, line-to-line for three-phase
Balanced three-phase system assumed
Sinusoidal waveform (no harmonics)
Default power factor = 1.0 if not specified

🔌 CAT Rating Guide

CAT II: Household / single-phase ≤300V
CAT III: Industrial / three-phase ≤600V
CAT IV: Utility / outdoor ≥1000V

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Power Parameter Calculator

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