# how to find the inductance of following ?

The three conductors of 3-phase overhead line are arranged in a horizontal plane with a spacing of 4 m

between adjacent conductors. The diameter of each conductor is 2 cm. Determine the inductance per

km per phase of the line assuming that the lines are transposed .

### 1 Answer

Relevance

- NCSLv 73 weeks ago
equivalent spacing

D = ³√(4*4*8) m = 5.04 m

wire radius r = 1 cm = 0.01 m

L = 2e-7H/m * ln(D/r) = 2e-7H/m * ln(5.04/0.01)

L = 1.24e-6 H/m

and so per kilometer, that's 1.24e-3 H

Hope this helps!

Source(s): Example 4.18 here: http://www.ee.uidaho.edu/ee/power/jlaw/COURSES/ECE...

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