From Handbook of Electric Power Calculations, Third Edition
PERPHASE INDUCTIVE REACTANCE
Calculate the perphase inductive reactance per mile (1600 m) for a threephase line at 377 rad/s. The conductors are aluminum conductors, steelreinforced (ACSR) Redwing (Table 9.2) arranged in a plane as shown in Fig. 9.4.

Figure 9.4: A planespaced transmission line.
Calculation Procedure
1. Calculate
From Table 9.2, GMR=0.0373 ft (0.01 m). Substituting in the equation for perphase inductance, we find =(2 10 ^{ 7})ln(3.6 7.2 3.6) ^{1/3}/0.01=12.2 10 ^{ 7} H/m.
2. Calculate Inductive Reactance, X _{ L}
X _{ L}=377 12.2 10 ^{?7} H/m 1600 m=0.74 ?/mi.
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