Sweep Frequency Response Analyzer (SFRA) User Guide
B-6 72A-2570-01 Rev. K 07/2011
* Indicates short-circuit tests where the terminals are shorted together with three
sets of jumpers, to provide symmetry (X1-X2, X2-X3, X3-X1) OR (Y1-Y2,
Y2-Y3, Y3-Y1). The neutral is not included for wye connections.
LV Open Circuit (OC)
All Other Terminals
Floating
Test 4 X1-X0 X1-X0 X1-X3 X1-X3
Test 5 X2-X0 X2-X0 X2-X1 X2-X1
Test 6 X3-X0 X3-X0 X3-X2 X3-X2
Tert Open Circuit (OC)
All Other Terminals
Floating
Test 7 Y1-Y0 Y1-Y3 Y1-Y0 Y1-Y3
Test 8 Y2-Y0 Y2-Y1 Y2-Y0 Y2-Y1
Test 9 Y3-Y0 Y3-Y2 Y3-Y0 Y3-Y2
Short Circuit (SC)
High (H) to Low (L)
Short [X1-X2-X3-X1]*
Test 10 H1-H0 H1-H0 H1-H0 H1-H0
Test 11 H2-H0 H2-H0 H2-H0 H2-H0
Test 12 H3-H0 H3-H0 H3-H0 H3-H0
Short Circuit (SC)
High (H) to Tertiary (T)
Short [Y1-Y2-Y3-Y1]*
Test 13 H1-H0 H1-H0 H1-H0 H1-H0
Test 14 H2-H0 H2-H0 H2-H0 H2-H0
Test 15 H3-H0 H3-H0 H3-H0 H3-H0
Short Circuit (SC)
Low (L) to Tertiary (T)
Short [Y1-Y2-Y3-Y1]*
Test 16 X1-X0 X1-X0 X1-X3 X1-X3
Test 17 X2-X0 X2-X0 X2-X1 X2-X1
Test 18 X3-X0 X3-X0 X3-X2 X3-X2
Table B.5 Three-Winding Transformer Table – 18 Tests (Part 2) (Continued)
Test Type Test #
3Wye-
Wye-
Wye
3Wye-
Wye-
Delta
3Wye-
Delta-
Wye
3Wye-
Delta-
Delta