GMR of conductor = 0.584 cm 

Distance a to b = 3.09 m 
Distance a to b-dash = 5.62 m 
Distance a to a-dash = 7.21 m 

Ds1 = 0.205 m 
Ds2 = 0.179 m 
Ds3 = 0.205 m 
Equivalent self GMD of one phase = 0.196 m 

DAB = 4.168 m 
DBC = 4.168 m 
DCA = 4.899 m 
Equivalent mutual GMD = 4.399 m 

Inductance/phase/m = 0.622*10^-3 mH 

Inductance/phase/km = 0.622 mH 

