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Table 1 Tests in some three-phase three-limb transformers

From: Three-phase distribution transformer connections modeling based on matrix operation method by phase-coordinates

Input voltage/p.u

Output voltage/p.u

Type I

AX

BY

CZ

ax

by

cz

1.000

0.671

0.320

1.002

0.663

0.323

Input voltage

V

Output voltage

V/(p.u)

   

Type II

     

ax

by

cz

   

210

144/(0.687)

72/(0.343)

   

220

150/(0.681)

77/(0.350)

   

by

ax

cz

   

210

103/(0.490)

101/(0.481)

   

220

109/(0.495)

107/(0.486)

   

cz

ax

by

   

210

72/(0.343)

142/(0.676)

   

220

107/(0.345)

148/(0.673)