3 Phase Transformers - Check Values - Unchecked As Yet
Find formulas for these calculations in Reference
Formulas Appendix page 11 and 12.
Find practice problems HERE.
|
|
Delta Delta
|
Delta Wye
|
Wye Wye
|
Wye Delta
|
Primary
|
E Line El
|
277
|
480
|
831
|
480
|
|
E Phase Eph
|
277
|
480
|
480
|
277
|
|
I Line Il
|
138.56
|
50
|
14.14
|
21.22
|
|
I Phase Iph
|
80
|
28.86
|
14.14
|
21.22
|
|
P Line Pl
|
58,715
|
39,923
|
18,000
|
27,000
|
|
P Phase Pph
|
19,567
|
13,307
|
6,000
|
9,000
|
|
|
|
|
|
|
|
|
|
|
|
|
Secondary
|
E Line El
|
208
|
415
|
360
|
240
|
|
E Phase Eph
|
208
|
240
|
208
|
240
|
|
I Line Il
|
162.76
|
55.43
|
18.86
|
49
|
|
I Phase Iph
|
93.97
|
55.43
|
18.86
|
49
|
|
P Line Pl
|
51,788
|
38,340
|
12,000
|
18,000
|
|
P Phase Pph
|
18,751
|
12,780
|
4,000
|
6,000
|
|
|
|
|
|
|
|
efficiency eff
|
.96
|
.98
|
.94
|
.94
|
|
ratio
|
1.33
|
2
|
2.3
|
1.15
|
|
power factor pf
|
.92
|
.98
|
.94
|
.94
|
|
|
|
|
|
|
|
