Asymmetrical Transposed Three Phase Transmission Line Inductance Calculator

This calculator estimates the per‑unit‑length inductance using: $L^{'} = 2 \times 10^{- 7} \ln (\frac{D_{m}}{r^{'}}) (H/m)$ with total inductance: $L_{total} = L^{'} \times L_{line}$

* Input the line length (km), the three inter‑conductor distances (mm), and the conductor GMR (mm). Distances are converted to meters.

Step 1: Enter Parameters

Line Length,

L_{line}

(km):

e.g., 50 km

Distance between Conductor 1 and 2,

D_{12}

(mm):

e.g., 300 mm

Distance between Conductor 2 and 3,

D_{23}

(mm):

e.g., 350 mm

Distance between Conductor 3 and 1,

D_{31}

(mm):

e.g., 400 mm

Conductor GMR,

r^{'}

(mm):

e.g., 10 mm

Step 1: Enter Parameters

Calculated Inductance