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B u c k - B o o s t T r a n s f o r m e r s
Selection Charts
130
Three Phase Application
Boosting
Bucking
Line Voltage
(Available)
189Y
109
196Y
113
201Y
116
208Y
120
189
208
220
219
230
250
255
264
Load Voltage
(Output)
208
234
240
230
208
230
242
208
208
227
232
240
Catalog Number
T181047
Load
kVA
1.50
0.84
0.87
1.66
0.75
0.83
0.87
1.58
0.83
0.90
0.92
0.95
Amps
4.17
2.08
2.08
4.17
2.08
2.08
2.08
4.39
2.30
2.29
2.29
2.29
Maximum Size of
Fuse or Breaker
10
6
6
10
6
6
6
10
6
6
6
6
T181048
Load
kVA
3.00
1.69
1.73
3.32
1.50
1.66
1.75
3.16
1.66
1.80
1.84
1.91
Amps
8.33
4.17
4.17
8.33
4.17
4.17
4.17
8.77
4.61
4.59
4.58
4.58
Maximum Size of
Fuse or Breaker
15
10
10
15
10
10
10
15
10
10
10
10
T181049
Load
kVA
4.50
2.53
2.60
4.98
2.25
2.49
2.62
4.74
2.49
2.71
2.76
2.86
Amps
12.50 6.25
6.25 12.50 6.25
6.25
6.25
13.16
6.91
6.88
6.87
6.88
Maximum Size of
Fuse or Breaker
20
15
15
20
15
15
15
20
15
15
15
15
T181050
Load
kVA
7.51
4.22
4.33
8.30
3.75
4.15
4.37
7.90
4.15
4.51
4.60
4.76
Amps
20.83 10.42 10.42 20.83 10.42 10.42 10.42
21.94 11.52 11.47 11.45 11.46
Maximum Size of
Fuse or Breaker
30
20
20
30
15
15
15
30
15
15
15
15
T181051
Load
kVA
15.01 8.44
8.66 16.60 7.51
8.30
8.73
15.80
8.30
9.02
9.20
9.53
Amps
41.67 20.83 20.83 41.67 20.83 20.83 20.83
43.87 23.04 22.94 22.90 22.92
Maximum Size of
Fuse or Breaker
60
35
35
60
30
30
30
60
30
30
30
30
T181052
Load
kVA
22.52 12.67 12.99 24.90 11.26 12.45 13.10
23.71 12.45 13.53 13.80 14.29
Amps
62.50 31.25 31.25 62.50 31.25 31.25 31.25
65.81 34.56 34.42 34.35 34.38
Maximum Size of
Fuse or Breaker
90
50
50
90
45
45
45
80
40
40
40
40
T111683
Load
kVA
30.02 16.89 17.32 33.20 15.01 16.60 17.46
31.61 16.60 18.04 18.40 19.05
Amps
83.33 41.67 41.67 83.33 41.67 41.67 41.67
87.74 46.07 45.89 45.80 45.83
Maximum Size of
Fuse or Breaker
125
70
70
125
60
60
60
110
60
60
60
60
T111684
Load
kVA
45.03 25.33 25.98 49.80 22.52 24.90 26.20
47.41 24.90 27.06 27.60 28.58
Amps
125.00 62.50 62.50 125.00 62.50 62.50 62.50
131.61 69.11 68.83 68.70 68.75
Maximum Size of
Fuse or Breaker
175
100
100
175
90
90
90
175
80
80
80
80
T111685
Load
kVA
60.04 33.77 34.64 66.40 30.02 33.20 34.93
63.22 33.20 36.08 36.81 38.11
Amps
166.67 83.33 83.33 167.67 83.33 83.33 83.33
175.48 92.15 91.78 91.59 91.67
Maximum Size of
Fuse or Breaker
250
125
125
250
125
125
125
225
110
110
110
110
T111686
Load
kVA
90.07 50.66 51.96 99.59 45.03 49.80 52.39
94.83 49.80 54.13 55.21 57.16
Amps
250.00 125.00 125.00 250.00 125.00 125.00 125.00
263.22 138.22 137.67 137.39 137.50
Maximum Size of
Fuse or Breaker
350
200
200
350
175
175
175
350
175
175
175
175
T111687
Load
kVA
150.11 84.44 86.60 165.99 75.06 82.99 87.32
158.05 82.99 90.21 92.02 95.26
Amps
416.67 208.33 208.33 416.67 208.33 208.33 208.33
438.70 230.37 229.44 228.99 229.17
Maximum Size of
Fuse or Breaker
600
350
350
600
300
300
300
600
300
300
300
300
T211688
①
Load
kVA
225.17 126.66 129.90 248.98 112.58 124.49 130.99
237.07 124.49 135.32 138.02 142.89
Amps
625.00 312.50 312.50 625.00 312.50 312.50 312.50
658.05 345.55 344.16 343.48 343.75
Maximum Size of
Fuse or Breaker
1000
500
500
1000
450
450
450
800
400
400
400
400
T211689
①
Load
kVA
300.22 168.87 173.21 331.98 150.11 165.99 174.65
316.10 165.99 180.42 184.03 190.53
Amps
833.33 416.67 416.67 833.33 416.67 416.67 416.67
877.40 460.74 458.88 457.97 458.33
Maximum Size of
Fuse or Breaker
1200
700
700
1200
600
600
600
1200
600
600
600
600
Quantity Required
3
3
3
3
2
2
2
2
2
2
2
2
SeePage136-137forConnectionDiagrams A-A F-F
F-F
A-A B-B B-B B-B
C-C E-E
E-E
E-E
E-E
①
See chart on page 133.