This Calctown Calculator calculates the inductance of a double circuit transmission line.

Here µ0 = 4p * 10-7. Please enter the RELATIVE permeability accordingly.

where

GMD_{a} = geometric mean distance of phase a

GMR_{a} = geometric mean radius of phase a

d = distance between adjacent lines

r = radius of line

r^{'} = effective radius

μ_{r} = relative permeability

L_{a} = inductance of phase a