Figure 3.9 illustrates two three-phase transmission lines. The Geometrical Mean Radius (GMR) of each conductor is (r^{prime})

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Figure 3.9 illustrates two three-phase transmission lines. The Geometrical Mean Radius (GMR) of each conductor is \(r^{\prime}\) and \(r^{\prime}

1) \(d=\frac{r^{\prime}}{\sqrt{2}}\).

2) \(d=2 r^{\prime}\).

3) \(d=\sqrt{2} r^{\prime}\).

4) No possible relation can be found.

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