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Transformer Tables and Charts

 

   Single Phase Transformers, Full Load Amperes (FLC)
KVA 120V 208V 240V 277V 480V 600V
.25 2.0 1.2 1. 0.9 0.5 0.4
.50 4.2 2.4 2.1 1.8 1.0 0.8
.75 6.3 3.6 3.1 2.7 1.6 1.3
1 8.3 4.8 4.2 3.6 2.1 1.7
1.5 12.5 7.2 6.2 5.4 3.1 2.5
2 16.7 9.6 8.3 7.2 4.2 3.3
3 25 14.4 12.5 10.8 6.2 5
5 41 24 20.8 18 10.4 8.3
7.5 62 36 31 27 15.6 12.5
10 83 48 41 36 20.8 16.7
15 125 72 62 54 31 25
25 206 120 104 90 52 41
37.5 312 180 156 135 76 62
50 416 240 208 180 104 83
75 625 340 312 270 156 125
100 833 480 416 361 208 166
167 1391 803 695 603 347 278
 
   Three Phase Transformers, Full Load Amperes (FLC)
KVA 208V 240V 480V 600V
3 8.3 7.2 3.6 2.9
6 16.6 14.4 7.2 5.8
9 25 21.6 10.8 8.6
15 41.7 36.1 18.0 14.4
30 83.4 72.3 36.1 28.9
45 124 108 54.2 43.4
75 208 180 90 72
112.5 312 270 135 108
150 416 360 180 144
225 624 541 270 216
300 832 721 360 288
500 1387 1202 601 481
750 2084 1806 903 723
1000 2779 2408 1204 963

 

   Insulation Class and Temperature Rise
KVA Insulation
1 Phase 3 Phase NEMA Class Temperature
Class
Temperature
Rise
0.25-25 3-15 F 180 C 115 C
15-167 15-1000 H 220 C 150 C

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