Asymmetrical Transposed Three Phase Transmission Line Inductance Calculator

This calculator estimates the per‑unit‑length inductance using: $$ L’ = 2 \times 10^{-7}\ln\!\left(\frac{D_m}{r’}\right) \quad\text{(H/m)} $$ with total inductance: $$ L_{\text{total}} = L’ \times L_{\text{line}} $$

* 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_{\text{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