Symmetrical Three Phase Transmission Line Inductance Calculator

Symmetrical Three Phase Transmission Line Inductance Calculator

Calculate the total inductance using: $$ L’ = 2\times10^{-7}\ln\!\left(\frac{D}{r}\right) \quad \text{(H/m)} $$ and $$ L_{\text{total}} = L’ \times L_{\text{line}} $$

* Enter the conductor spacing \( D \) (mm), conductor GMR \( r \) (mm), and line length (km). Values are converted to SI units.

Step 1: Enter Parameters

e.g., 300 mm

e.g., 10 mm

e.g., 50 km

Formulas:
Per-unit-length inductance: $$ L’ = 2\times10^{-7}\ln\!\left(\frac{D}{r}\right) \quad \text{(H/m)} $$
Total inductance: $$ L_{\text{total}} = L’ \times L_{\text{line}} $$
(Note: All inputs are converted to SI units.)