How do I calculate Voltage Drop — Three Phase AC?

To calculate Voltage Drop — Three Phase AC: Enter Cable length (one way), Current I, Conductor cross-section and other values. Click Calculate. INDUGRID computes the result instantly using the formula: Uv = √3 × ρ × L × I × cos(φ) / A. No registration required.

What units does the Voltage Drop — Three Phase AC calculator use?

The Voltage Drop — Three Phase AC calculator uses the following units: m, A, mm², V. SI units are used by default.

Is the Voltage Drop — Three Phase AC calculator free?

Yes. The INDUGRID Voltage Drop — Three Phase AC calculator is completely free, requires no account or login, and works on desktop and mobile browsers.

Electrical Engineering

Voltage Drop — Three Phase AC

Calculate voltage drop in three-phase AC cables. Three-phase transport is significantly more efficient than single-phase for the same cable cross-section.

Units:

in LinkedIn

💡Three-phase voltage drop uses factor √3 (≈1.732) instead of factor 2, making it more efficient than single-phase for the same conductor size. Maximum voltage drop IEC 60364: 5% from transformer to the furthest point.

Uv = √3 × ρ × L × I × cos(φ) / A

Input

Cable length (one way) iOne-way cable length in metres.

Current I iPhase current in Ampères.

Conductor cross-section iCross-section of one phase conductor in mm².

mm²

Power factor cos φ iPower factor of the load. Motors typically 0.78–0.92.

Phase voltage (L-N) iPhase-to-neutral voltage (230V in EU). Line voltage = 230×√3 = 400V.

Result

Voltage drop (phase) [V] —

Voltage drop (line) [V] —

Percentage drop [%] —

Residual line voltage [V] —

IEC 60364 assessment —