SECTION
BUCK-BOOST TRANSFORMERS
ACME ELECTRIC
•
MILWAUKEE, WI
•
800.334.5214
•
acmetransformer.com
99
{
See chart on page 101.
NOTE: (1) Inputs and Outputs may be reversed; kVA capacity remains constant. All applications above bold face line are suitable for 50/60 Hz.
All applications below bold face line are suitable for 60 Hz only. (2) Connection Diagrams A-A and F-F cannot be reverse connected.
GROUP III
THREE PHASE
BOOSTING
Line Voltage
399Y 380 430 440
460
460 480 480
(Available)
230
Y
Load Voltage
480Y 420 473 462
506
483 528 504
(Output)
277
Y
CAT. NO.
Load kVA
0.86
0.76
0.85 1.66
0.91
1.74 0.95 1.82
T181061
Amps
1.04
1.04
1.04 2.08
1.04
2.08 1.04 2.08
Max. Size of
3
3
3
6
3
6
3
6
Fuse or Breaker
Load kVA
1.73
1.51
1.70 3.33
1.82
3.48 1.90 3.63
T181062
Amps
2.08
2.08
2.08 4.16
2.08
4.16 2.08 4.16
Max. Size of
6
6
6
10
6
10
6
10
Fuse or Breaker
Load kVA
2.60
2.27
2.56 4.99
2.73
5.22 2.85 5.45
T181063
Amps
3.12
3.12
3.12 6.24
3.12
6.25 3.12 6.24
Max. Size of
10
6
6
15
6
15
6
15
Fuse or Breaker
Load kVA
4.33
3.78
4.26 8.32
4.56
8.70 4.76 9.08
T181064
Amps
5.20
5.20
5.20 10.40
5.20 10.40 5.20 10.40
Max. Size of
15
10
10
15
10
15
10
15
Fuse or Breaker
Load kVA
8.60
7.56
8.52 16.64
9.11 17.40 9.51 18.16
T181065
Amps
10.40 10.40 10.40 20.80 10.40 20.80 10.40 20.80
Max. Size of
20
15
15
30
15
30
15
30
Fuse or Breaker
Load kVA
12.90 11.34 12.77 24.97 13.67 26.10 14.27 27.24
T181066
Amps
15.60 15.60 15.60 31.20 15.60 31.20 15.60 31.20
Max. Size of
25
25
25
45
25
45
25
45
Fuse or Breaker
Load kVA
17.30 15.12 17.03 33.29 18.23 34.80 19.02 36.31
T137920
Amps
20.80 20.80 20.80 41.60 20.80 41.60 20.80 41.60
Max. Size of
35
30
30
60
30
60
30
60
Fuse or Breaker
Load kVA
25.90 22.69 25.55 49.93 27.34 52.20 28.53 54.47
T137921
Amps
31.20 31.20 31.20 62.40 31.20 62.40 31.20 62.40
Max. Size of
50
45
45
90
45
90
45
90
Fuse or Breaker
Load kVA
34.60 30.25 34.07 66.58 36.46 69.60 38.04 72.63
T137922
Amps
41.60 41.60 41.60 83.20 41.60 83.20 41.60 83.20
Max. Size of
70
60
60
110
60
110
60
110
Fuse or Breaker
Load kVA
52.00 45.45 51.18 100.03 54.69 104.57 57.07 109.12
T137923
Amps
62.50 62.50 62.50 125.00 62.50 125.00 62.50 125.00
Max. Size of
100
90
90
175
90
175
90
175
Fuse or Breaker
Load kVA
86.10 75.62 85.17 166.44 91.15 174.01 95.11 181.57
T137924
Amps
104.00 104.00 104.00 208.00 104.00 208.00 104.00 208.00
Max. Size of
175
150
150
300
150
300
150
300
Fuse or Breaker
Load kVA
129.30 113.43 127.75 249.66 136.72 261.01 142.67 272.36
T243570
Amps
156.00 156.00 156.00 312.00 156.00 312.00 156.00 312.00
Max. Size of
250
225
225
450
225
450
225
450
Fuse or Breaker
Load kVA
173.10 151.25 170.33 332.89 182.29 348.02 190.22 363.15
T243571
{
Amps
208.00 208.00 208.00 416.00 208.00 416.00 208.00 416.00
Max. Size of
350
300
300
600
300
600
300
600
Fuse or Breaker
Quantity Required
3
2
2
2
2
2
2
2
See Page 110 For
F-F
B-B
B-B
G-G
B-B
G-G
B-B
G-G
Connection Diagrams
BUCKING
440 440 460 460 480 480 500 500
400 419 438 418 457 436 455 477
0.79 1.58 1.66 0.83 1.73 0.86 0.90
1.80
1.14 2.18 2.18 1.14 2.18 1.14 1.14
2.18
3
6
6
3
6
3
3 6
1.59 3.17 3.31 1.66 3.46 1.73 1.80
3.61
2.29 4.37 4.37 2.29 4.37 2.29 2.29
4.37
6
10
10
6
10
6
6 10
2.38 4.75 4.97 2.48 5.19 2.59 2.70
5.41
3.43 6.55 6.55 3.43 6.55 3.43 3.43
6.55
6
15
15
6
15
6
6 15
3.96 7.92 8.28 4.14 8.64 4.32 4.51
9.02
5.72 10.92 10.92 5.72 10.92 5.72 5.72 10.92
10
15
15
10
15
10
10 15
7.93 15.85 16.57 8.28 17.29 8.64 9.02 18.04
11.44 21.84 21.84 11.44 21.84 11.44 11.44 21.84
15
30
30
15
30
15
15 30
11.89 23.77 24.85 12.42 25.93 12.96 13.52 27.07
17.16 32.76 32.76 17.16 32.76 17.16 17.16 32.76
20
40
40
20
40
20
20 40
15.85 31.70 33.14 16.57 34.57 17.28 18.03 36.09
22.88 43.68 43.68 22.88 43.68 22.88 22.88 43.68
30
60
60
30
60
30
30 60
23.78 47.55 49.71 24.85 51.86 25.92 27.05 54.13
34.32 65.52 65.52 34.32 65.52 34.32 34.32 65.52
40
80
80
40
80
40
40 80
31.70 63.40 66.27 33.13 69.15 34.56 36.06 72.18
45.76 87.36 87.36 45.76 87.36 45.76 45.76 87.36
60
110
110
60
110
60
60 110
47.63 95.25 99.57 49.77 103.89 51.92 54.18 108.44
68.75 131.25 131.25 68.75 131.25 68.75 68.75 131.25
80
175
175
80
175
80
80 175
79.26 158.50 165.69 82.83 172.87 86.39 90.16 180.44
114.40 218.40 218.40 114.40 218.40 114.40 114.40 218.40
150
300
300
150
300
150
150 300
118.89 237.75 248.53 124.24 259.31 129.59 135.23 270.66
171.60 327.60 327.60 171.60 327.60 171.60 171.60 327.60
200
400
400
200
400
200
200 400
158.52 317.00 331.37 165.65 345.75 172.78 180.31 360.88
228.80 436.80 436.80 228.80 436.80 228.80 228.80 436.80
300
600
600
300
600
300
300 600
2
2
2
2
2
2
2
2
E-E
C-C
C-C
E-E
C-C
E-E
E-E
C-C
