MV Transmission Line Impedance Calculator
Fast Per-Phase Impedance Estimation for MV Transmission Lines
Calculate MV line impedance, resistance, reactance, impedance angle, and inductance using conductor data, frequency, line length, and phase spacing.
Line & Conductor Parameters
Step 1: Grid & Line Details
Step 2: Conductor Properties
Step 3: Line Geometry
Impedance Results
Per Phase Data
Total Impedance Magnitude (|Z|)
The total opposition to alternating current flow for the entire line length, combining both resistance and reactance.
--
Ω
Z = R + jX
Impedance Angle (θ)
The phase angle difference between the voltage and current vectors caused by the line's impedance.
--
°
Inductance (L0)
The per-kilometer series inductance calculated from the phase spacing and conductor GMR.
--
mH/km
Total Resistance (R)
The active component of the line impedance, responsible for I²R power losses.
--
Ω
Total Reactance (XL)
The reactive component of the line impedance, causing voltage drop without active power dissipation.
--
Ω
Calculation Formulas
Inductance (L) =
Reactance (XL) =
Equivalent Spacing (Deq) is derived automatically based on layout.
0.2 × ln(Deq / GMR) mH/km Reactance (XL) =
2πf × L Equivalent Spacing (Deq) is derived automatically based on layout.