Three Phase Current Calculator

Calculate three-phase current (amps) based on power (kW), voltage (V), and power factor (PF). This calculator helps in electrical engineering and power system design.

Input Parameters

Calculation Results

Calculation Results

Results will appear here after calculation

Calculation Formula

I = P / (√3 × V × PF)

Where:
I = Current (amps)
P = Power (watts)
√3 = Square root of 3 (for three-phase systems)
V = Voltage (volts)
PF = Power Factor

Three Phase Current Calculator Calculator Usage Guide

Learn how to use the Three Phase Current Calculator calculator and its working principles

How to Use This Calculator

  1. Enter the power in kilowatts (kW) your system requires
  2. Input the voltage (V) of your power system
  3. Specify the power factor (PF) of your load (typically between 0.7 and 0.95)
  4. Select the phase type (Wye or Delta) of your electrical system
  5. Click "Calculate" to determine the current in amps

Understanding Three Phase Systems

In three-phase electrical systems, power is transmitted more efficiently than in single-phase systems. There are two common configurations:

  • Wye (Y) Connection: Three phase wires plus a neutral wire. The line current is equal to the phase current.
  • Delta (Δ) Connection: Three phase wires forming a triangle. The line current is √3 times the phase current.

Example Application

Suppose you have a 50 kW three-phase motor operating at 440V with a power factor of 0.85, connected in a Delta configuration. The calculation would be:

Power (W) = 50 kW × 1000 = 50,000 W
Line Current (ILine) = 50,000 / (440 × √3 × 0.85) ≈ 81.25 A
Phase Current (IPhase) = 81.25 / √3 ≈ 47.25 A

Important Notes

  • Ensure all units are consistent (kW to W, V to V)
  • The power factor represents the efficiency of power usage (higher is better)
  • This calculator provides line current values for Wye connections and phase current for Delta connections