Buck Boost Transformers

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Hammond Buck Boost Transformers

Buck Boost Transformer Installation  Three Phase Buck Boost Transformers  Low Voltage Applications  AC Line Reactors 
Acme Buck Boost Transformers  Hammond Buck Boost Transformers 
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Buck Boost Transformer Installation
Details and further information regarding installation and basic configurations.

Three Phase Buck Boost Transformers
Fundamental data with links to listings of transformers used in 3 phase applications.

Low Voltage Applications
A basic description and links to transformers recommended for low voltage applications.

AC Line Reactors
Adjust, block or otherwise handle unwanted power characteristics often generated during normal use of power in an area. Not to be confused with the need for a Buck Boost or other type Transformer.

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Hammond Buck Boost Transformers
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Power transmission and distribution requires voltage and line characteristics to be altered and adjusted in several ways. Read up on what is generally available.

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transformer guide
Small kVA 3 Phase Transformers

HAMMOND BUCK BOOST TRANSFORMERS

RESOURCE LINKS, MODELS & DESCRIPTIONS

Hammond Buck Boost Transformers

 

Hammond Buck Boost Transformers come in 50 and 60Hz frequency models. and in single or three phase. 50Hz is the European standard; 60Hz for the US. The selection insures a Hammond Buck Boost Transformer likely to answer your needs. The KVA rating for each model is listed next to the model number.

Hammond carries a superior line of products you will be happy with whatever your needs may be.

 

HAMMOND Buck Boost Transformers
SINGLE PHASE GROUP A (50/60Hz):
Primary Voltage 120/240 x Secondary Voltage 12/24

Models:

  0.05 KVA  QC05ERCB    0.10 KVA  QC10ERCB    0.15 KVA  QC15ERCB

  0.20 KVA  QC20ERCB    0.25 KVA  QC25ERCB    0.35 KVA  QC35ERCB

  0.50 KVA  QC50ERCB    0.75 KVA  QC75ERCB    1.00 KVA  Q1C0ERCB

  1.50 KVA  Q1C5ERCF    2.00 KVA  Q002ERCF     3.00 KVA  Q003ERCF

  5.00 KVA  Q005ERCF

 

HAMMOND Buck Boost Transformers
SINGLE PHASE GROUP B (50/60Hz):
Primary Voltage 120/240 x Secondary Voltage 16/32

Models:

  0.05 KVA  QC05ESCB    0.10 KVA  QC10ESCB   0.15 KVA  QC15ESCB

  0.20 KVA  QC20ESCB    0.25 KVA  QC25ESCB   0.35 KVA  QC35ESCB

  0.50 KVA  QC50ESCB    0.75 KVA  QC75ESCB   1.00 KVA  Q1C0ESCB

  1.50 KVA  Q1C5ESCF    2.00 KVA  Q002ESCF    3.00 KVA  Q003ESCF

  5.00 KVA  Q005ESCF

 

HAMMOND Buck Boost Transformers
SINGLE PHASE GROUP C (50/60Hz):
Primary Voltage 240/480 x Secondary Voltage 24/48

Models:

  0.05 KVA  QC05DTCB    0.10 KVA  QC10DTCB   0.15 KVA  QC15DTCB

  0.20 KVA  QC20DTCB    0.25 KVA  QC25DTCB   0.35 KVA  QC35DTCB

  0.50 KVA  QC50DTCB    0.75 KVA  QC75DTCB   1.00 KVA  Q1C0DTCB

  1.50 KVA  Q1C5DTCF    2.00 KVA  Q002DTCF    3.00 KVA  Q003DTCF

  5.00 KVA  Q005DTCF

 

HAMMOND Buck Boost Transformers
THREE PHASE GROUP A (50/60Hz):
Primary Voltage 120/240 x Secondary Voltage 12/24

Models:

  0.05 KVA  QC05ERCB    0.10 KVA  QC10ERCB   0.15 KVA  QC15ERCB

  0.20 KVA  QC20ERCB    0.25 KVA  QC25ERCB   0.35 KVA  QC35ERCB

  0.50 KVA  QC50ERCB    0.75 KVA  QC75ERCB   1.00 KVA  Q1C0ERCB

  1.50 KVA  Q1C5ERCF    2.00 KVA  Q002ERCF    3.00 KVA  Q003ERCF

  5.00 KVA  Q005ERCF

 

HAMMOND Buck Boost Transformers
THREE PHASE GROUP B (50/60Hz):
Primary Voltage 120/240 x Secondary Voltage 16/32

Models:

  0.05 KVA  QC05ESCB    0.10 KVA  QC10ESCB   0.15 KVA  QC15ESCB

  0.20 KVA  QC20ESCB    0.25 KVA  QC25ESCB   0.35 KVA  QC35ESCB

  0.50 KVA  QC50ESCB    0.75 KVA  QC75ESCB   1.00 KVA  Q1C0ESCB

  1.50 KVA  Q1C5ESCF    2.00 KVA  Q002ESCF    3.00 KVA  Q003ESCF

  5.00 KVA  Q005ESCF

 

HAMMOND Buck Boost Transformers
THREE PHASE GROUP C (50/60Hz):
Primary Voltage 240/480 x Secondary Voltage 24/48

Models:

  0.05 KVA  QC05DTCB    0.10 KVA  QC10DTCB   0.15 KVA  QC15DTCB

  0.20 KVA  QC20DTCB    0.25 KVA  QC25DTCB   0.35 KVA  QC35DTCB

  0.50 KVA  QC50DTCB    0.75 KVA  QC75DTCB   1.00 KVA  Q1C0DTCB

  1.50 KVA  Q1C5DTCF    2.00 KVA  Q002DTCF    3.00 KVA  Q003DTCF

  5.00 KVA  Q005DTCF


Buck-Boost Transformer Selection Chart
120 x 240 Volts Primary–12/24 Volts Secondary
 Single Phase BOOSTING BUCKING
Line Voltage (Available)  96 100 105 109 189 208 218 220 125 132 229 245 250 252
Load Voltage (Output)  115 120 116 120 208 229 240 242 114 120 208 223 227 240
Click part # for info Conn.
Diag.
B B A A D D D D A A D D D C
Hammond QC05ERCB KVA
Amps
0.24
2.08
0.25
2.08
0.48
4.17
0.50
4.17
0.43
2.08
0.48
2.08
0.50
2.08
0.50
2.08
0.52
4.58
0.55
4.58
0.48
2.29
0.51
2.29
0.52
2.29
1.05
4.38
Hammond QC10ERCB KVA
Amps
0.48
4.17
0.50
4.17
0.96
8.33
1.00
8.33
0.87
4.17
0.95
4.17
1.00
4.17
1.01
4.17
1.04
9.17
1.10
9.17
0.95
4.58
1.02
4.58
1.04
4.58
2.10
8.75
Hammond QC15ERCB KVA
Amps
0.72
6.25
0.75
6.25
1.44
12.50
1.50
12.50
1.30
6.25
1.43
6.25
1.50
6.25
1.51
6.25
1.56
13.75
1.65
13.75
1.43
6.87
1.53
6.87
1.56
6.87
3.15
13.13
Hammond QC25ERCB KVA
Amps
1.20
10.42
1.25
10.42
2.41
20.83
2.50
20.83
2.17
10.42
2.38
10.42
2.50
10.42
2.52
10.42
2.60
22.92
2.75
22.92
2.39
11.46
2.55
11.46
2.60
11.46
5.25
21.88
Hammond QC50ERCB KVA
Amps
2.40
20.83
2.50
20.83
4.81
41.67
5.00
41.67
4.33
20.83
4.77
20.83
5.00
20.83
5.04
20.83
5.21
45.83
5.50
45.83
4.77
22.92
5.10
22.92
5.21
22.92
10.50
43.75
Hammond QC75ERCB KVA
Amps
3.60
31.25
3.75
31.25
7.22
62.50
7.38
62.50
6.50
31.25
7.15
31.25
7.49
31.25
7.56
31.25
7.81
68.75
8.25
68.75
7.16
34.37
7.66
34.37
7.81
34.37
15.75
65.63
Hammond Q1C0ERCB KVA
Amps
4.80
41.67
5.00
41.67
9.63
83.33
9.99
83.33
8.66
41.67
9.53
41.67
9.99
41.67
10.08
41.67
10.42
91.67
11.00
91.67
9.54
45.83
10.21
45.83
10.42
45.83
21.00
87.50
Hammond Q1C5ERCF KVA
Amps
7.20
62.50
7.50
62.50
14.44
125.00
14.99
125.00
12.99
62.50
14.30
62.50
14.99
62.50
15.13
62.50
15.62
137.50
16.50
137.50
14.31
68.75
15.31
68.75
15.62
68.75
31.50
131.25
Hammond Q002ERCF KVA
Amps
9.60
83.33
10.00
83.33
19.25
166.67
19.98
166.67
17.32
83.33
19.07
83.33
19.98
83.33
20.17
83.33
20.83
183.33
22.00
183.33
19.08
91.67
20.42
91.67
20.83
91.67
42.00
175.00
Hammond Q003ERCF KVA
Amps
14.40
125.00
15.00
125.00
28.88
250.00
29.98
250.00
25.99
125.00
28.60
125.00
29.98
125.00
30.25
125.00
31.25
275.00
33.00
275.00
28.62
137.50
30.62
137.50
31.25
137.50
63.00
262.50
Hammond Q005ERCF KVA
Amps
24.00
208.33
25.00
208.33
48.13
416.67
49.96
416.67
43.31
208.33
47.67
208.33
49.96
208.33
50.42
208.33
52.08
458.33
55.00
458.33
47.71
229.17
51.04
229.17
52.08
229.17
105.00
437.50
Click part # for info Conn.
Diag.
B B A A D D D D A A D D D C
  Output for lower voltage can be found by:  Rated Output Voltage
Rated Input Voltage
x  Input Actual Voltage = Output New Voltage.
 
Output KVA available at reduced voltage can be found by:  Actual Input Voltage
Rated Input Voltage
x  Output KVA = New KVA Rating.
 
Buck-Boost Transformer Selection Chart
120 x 240 Volts Primary–12/24 Volts Secondary
 Three Phase BOOSTING BUCKING
Line Voltage (Available)  189Y
109
195Y
113
200Y
115
208Y
120
416Y
240
416Y
240
189 208 220 218 229 250 255 264
Load Voltage (Output)  208Y
120
234Y
135
240Y
139
229Y
132
458Y
264
437Y
252
208 229 242 208 208 227 232 240
Click part # for info Conn.
Diag.
F E E F J K G G G H G G G G
Hammond QC05ERCB KVA
Amps
1.50
4.17
0.84
2.08
0.87
2.08
1.65
4.17
1.65
2.08
3.15
4.17
0.75
2.08
0.83
2.08
0.87
2.08
1.57
4.38
0.83
2.29
0.90
2.29
0.92
2.29
0.95
2.29
Hammond QC10ERCB KVA
Amps
3.00
8.33
1.69
4.17
1.73
4.17
3.30
8.33
3.30
4.17
6.30
8.33
1.50
4.17
1.65
4.17
1.75
4.17
3.15
8.75
1.65
4.58
1.80
4.58
1.84
4.58
1.91
4.58
Hammond QC15ERCB KVA
Amps
4.50
12.50
2.53
6.25
2.60
6.25
4.95
12.50
4.95
6.25
9.46
12.50
2.25
6.25
2.48
6.25
2.62
6.25
4.72
13.13
2.48
6.87
2.71
6.87
2.76
6.88
2.86
6.88
Hammond QC25ERCB KVA
Amps
7.50
20.83
4.22
10.42
4.33
1.42
8.26
20.83
8.26
10.42
15.76
10.42
3.75
10.42
4.13
10.42
4.37
10.42
7.87
21.88
4.13
11.46
4.51
11.46
4.60
11.46
4.76
11.46
Hammond QC50ERCB KVA
Amps
15.00
41.67
8.44
20.83
8.66
20.83
16.51
41.67
16.51
20.83
31.52
241.67
7.50
20.83
8.26
20.83
8.73
20.83
15.73
43.75
8.26
22.92
9.02
22.92
9.20
22.92
9.53
22.92
Hammond QC75ERCB KVA
Amps
22.51
62.50
12.67
31.25
12.99
31.25
24.77
62.50
24.77
31.25
47.28
62.50
11.25
31.25
12.38
31.25
13.10
31.25
23.60
65.63
12.39
34.37
13.53
34.37
13.80
34.37
14.29
34.38
Hammond Q1C0ERCB KVA
Amps
30.01
83.33
16.89
41.67
17.32
41.67
33.02
83.33
33.02
41.67
63.05
83.33
15.00
41.67
16.51
41.67
17.46
41.67
31.47
87.50
16.53
45.83
18.04
45.83
18.40
45.83
19.05
45.83
Hammond Q1C5ERCF KVA
Amps
45.01
125.00
25.33
62.50
25.98
62.50
49.54
125.00
49.54
62.50
94.57
125.00
22.51
62.50
24.77
62.50
26.20
62.50
47.20
131.25
24.79
68.75
27.06
68.75
27.60
68.75
28.58
68.75
Hammond Q002ERCF KVA
Amps
60.02
166.67
33.77
83.33
34.64
83.33
66.05
166.67
66.05
83.33
126.09
166.67
30.01
83.33
33.02
83.33
34.93
83.33
62.93
175.00
33.05
91.67
36.08
91.67
36.81
91.67
38.11
91.67
Hammond Q003ERCF KVA
Amps
90.02
250.00
50.66
125.00
51.96
125.00
99.07
250.00
99.07
125.00
189.14
250.00
45.01
125.00
49.54
125.00
52.39
125.00
94.40
262.50
49.58
137.50
54.13
137.50
55.21
137.50
57.16
137.50
Hammond Q005ERCF KVA
Amps
150.04
416.67
84.44
208.33
86.60
208.33
165.12
416.67
165.12
208.33
315.23
416.67
75.02
208.33
82.56
208.33
87.32
208.33
157.33
437.50
82.63
229.17
90.21
229.17
92.02
229.17
95.26
229.17
No. of Transformers 3 3 3 3 3 3 2 2 2 2 2 2 2 2
Catalog Number Conn.
Diag.
F E E F J K G G G H G G G G
  Output for lower voltage can be found by:  Rated Output Voltage
Rated Input Voltage
x  Input Actual Voltage = Output New Voltage.
 
Output KVA available at reduced voltage can be found by:  Actual Input Voltage
Rated Input Voltage
x  Output KVA = New KVA Rating.
 
Buck-Boost Transformer Selection Chart
120 x 240 Volts Primary–16/32 Volts Secondary
 Single Phase BOOSTING BUCKING
Line Voltage (Available)  95 100 105 208 215 215 220 225 135 240 240 245 250 255
Load Voltage (Output)  120 113 119 236 244 229 235 240 120 212 225 230 234 239
Click part # for info Conn.
Diag.
B A A D D C C C A D C C C C
Hammond QC05ESCB KVA
Amps
0.19
1.56
0.35
3.13
0.37
3.13
0.37
1.56
0.38
1.56
0.72
3.12
0.73
3.13
0.75
3.12
0.42
3.54
0.38
1.77
0.75
3.33
0.77
3.33
0.78
3.33
0.80
3.33
Hammond QC10ESCB KVA
Amps
0.38
3.13
0.71
6.25
0.74
6.25
0.74
3.13
0.76
3.13
1.43
6.25
1.47
6.25
1.50
6.25
0.84
7.08
0.75
3.54
1.50
6.67
1.53
6.67
1.56
6.67
1.59
6.67
Hammond QC15ESCB KVA
Amps
0.56
4.69
1.06
9.38
1.12
9.38
1.11
4.69
1.14
4.69
2.15
9.37
2.20
9.37
2.25
9.37
1.27
10.63
1.13
5.31
2.25
10.00
2.30
10.00
2.34
10.00
2.39
10.00
Hammond QC25ESCB KVA
Amps
0.94
7.81
1.77
15.63
1.86
15.63
1.84
7.81
1.90
7.81
3.58
15.62
3.67
15.62
3.75
15.62
2.11
17.71
1.88
8.85
3.75
16.67
3.83
16.67
3.91
16.67
3.98
16.67
Hammond QC50ESCB KVA
Amps
1.88
15.63
3.54
31.25
3.72
31.25
3.68
15.63
3.81
15.63
7.17
31.25
7.33
31.25
7.50
31.25
4.22
35.42
3.75
17.71
7.50
33.33
7.66
33.33
7.81
33.33
7.97
33.33
Hammond QC75ESCB KVA
Amps
2.82
23.44
5.31
46.88
5.58
46.88
5.53
23.44
5.71
23.44
10.75
46.87
11.00
46.87
11.25
46.87
6.33
53.13
5.63
26.56
11.25
50.00
11.48
50.00
11.72
50.00
11.95
50.00
Hammond Q1C0ESCB KVA
Amps
3.76
31.25
7.08
62.50
7.44
62.50
7.37
31.25
7.61
31.25
14.33
62.50
14.67
62.50
15.00
62.50
8.44
70.83
7.50
35.42
15.00
66.67
15.31
66.67
15.62
66.67
15.94
66.67
Hammond Q1C5ESCF KVA
Amps
5.64
46.88
10.63
93.75
11.16
93.75
11.05
46.88
11.42
46.88
21.50
93.75
22.00
93.75
22.50
93.75
12.66
106.25
11.25
53.13
22.50
100.00
22.97
100.00
23.44
100.00
23.91
100.00
Hammond Q002ESCF KVA
Amps
7.52
62.50
14.71
125.00
14.88
125.00
14.73
62.50
15.23
62.50
28.67
125.00
29.33
125.00
30.00
125.00
16.88
141.67
15.00
70.83
30.00
133.33
30.62
133.33
31.25
133.33
31.87
133.33
Hammond Q003ESCF KVA
Amps
11.28
93.75
21.25
187.50
22.31
187.50
22.10
93.75
22.84
93.75
43.00
187.50
44.00
187.50
45.00
187.50
25.31
212.50
22.50
106.25
45.00
200.00
45.94
200.00
46.87
200.00
47.81
200.00
Hammond Q005ESCF KVA
Amps
18.80
156.25
35.42
312.50
37.19
312.50
36.83
156.25
38.07
156.25
71.67
312.50
73.33
312.50
75.00
312.50
42.19
354.17
37.50
177.08
75.00
333.33
76.56
333.33
78.12
333.33
79.69
333.33
Catalog Number Conn.
Diag.
B A A D D C C C A D C C C C
  Output for lower voltage can be found by:  Rated Output Voltage
Rated Input Voltage
x  Input Actual Voltage = Output New Voltage.
 
Output KVA available at reduced voltage can be found by:  Actual Input Voltage
Rated Input Voltage
x  Output KVA = New KVA Rating.
 
Buck-Boost Transformer Selection Chart
120 x 240 Volts Primary–16/32 Volts Secondary
 Three Phase BOOSTING BUCKING
Line Voltage (Available)  183Y
106
208Y
120
195 208 225 240 245 250 256 265 272
Load Voltage (Available)  208Y
120
236Y
136
208 236 240 208 230 234 240 234 240
Click part # for info Conn.
Diag.
F F H G H L H H H G G
Hammond QC05ESCB KVA
Amps
1.12
3.13
1.28
3.13
1.13
3.12
0.64
1.56
1.30
3.12
0.56
1.56
1.33
3.33
1.35
3.33
1.39
3.33
0.72
1.77
0.74
1.77
Hammond QC10ESCB KVA
Amps
2.25
6.25
2.55
6.25
2.25
6.25
1.28
3.13
2.60
6.25
1.13
3.13
2.65
6.67
2.71
6.67
2.77
6.67
1.43
3.54
1.47
3.54
Hammond QC15ESCB KVA
Amps
3.37
9.38
3.83
9.38
3.38
9.37
1.91
4.69
3.90
9.37
1.69
4.69
3.98
10.00
4.06
10.00
4.16
10.00
2.15
5.31
2.21
5.31
Hammond QC25ESCB KVA
Amps
5.61
15.63
6.38
15.62
5.63
15.62
3.19
7.81
6.50
15.62
2.81
7.81
6.63
16.67
6.77
16.67
6.93
16.67
3.59
8.85
3.68
8.85
Hammond QC50ESCB KVA
Amps
11.23
31.25
12.76
31.25
11.26
31.25
6.38
15.63
12.99
31.25
5.63
15.63
13.26
33.33
13.53
33.33
13.86
33.33
7.17
17.71
7.36
17.71
Hammond QC75ESCB KVA
Amps
16.84
46.88
19.14
46.88
16.89
46.87
9.58
23.44
19.49
46.87
8.44
23.44
19.89
50.00
20.30
50.00
20.78
50.00
10.76
26.56
11.04
26.56
Hammond Q1C0ESCB KVA
Amps
22.45
62.50
25.52
62.50
22.52
62.50
12.76
31.25
25.98
62.50
11.26
31.25
26.52
66.67
27.06
66.67
27.71
66.67
14.34
35.42
14.72
35.42
Hammond Q1C5ESCF KVA
Amps
33.68
93.75
38.28
93.75
33.77
93.75
19.14
46.88
38.97
93.75
16.89
46.88
39.78
100.00
40.59
100.00
41.57
100.00
21.52
53.13
22.08
53.13
Hammond Q002ESCF KVA
Amps
44.90
125.00
51.04
125.00
45.03
125.00
25.52
62.50
51.96
125.00
22.52
62.50
53.04
133.33
54.13
133.33
55.43
133.33
28.69
70.83
29.44
70.83
Hammond Q003ESCF KVA
Amps
67.36
187.50
76.56
187.50
67.55
187.50
38.28
93.75
77.94
187.50
33.77
93.75
79.57
200.00
81.19
200.00
83.14
200.00
43.03
106.25
44.17
106.25
Hammond Q005ESCF KVA
Amps
112.26
312.50
127.59
312.50
112.58
312.50
63.80
156.25
129.90
312.50
56.29
156.25
132.61
333.33
135.32
333.33
138.56
333.33
71.72
177.08
73.61
177.08
No. of Transformers 3 3 2 2 2 2 2 2 2 2 2
Catalog Number Conn.
Diag.
F F H G H L H H H G G
  Output for lower voltage can be found by:  Rated Output Voltage
Rated Input Voltage
x  Input Actual Voltage = Output New Voltage.
 
Output KVA available at reduced voltage can be found by:  Actual Input Voltage
Rated Input Voltage
x  Output KVA = New KVA Rating.
 
Buck-Boost Transformer Selection Chart
240 x 480 Volts Primary–24/48 Volts Secondary
 Single Phase BOOSTING BUCKING
Line Voltage (Available)  230 380 416 425 430 435 440 450 465 132 277 480 480 504
Load Voltage (Output)  276 418 458 468 473 457 462 495 483 126 231 436 457 480
Click part # for info Conn.
Diag.
B D D D D C C D C C B D C C
Hammond QC05DTCB KVA
Amps
0.29
1.04
0.44
1.04
0.48
1.04
0.49
1.04
0.49
1.04
0.95
2.08
0.96
2.08
0.52
1.04
1.01
2.08
0.28
2.19
0.29
1.25
0.50
1.15
1.02
2.19
1.05
2.19
Hammond QC10DTCB KVA
Amps
0.58
2.08
0.87
2.08
0.95
2.08
0.97
2.08
0.99
2.08
1.90
4.17
1.93
4.17
1.03
2.08
2.01
4.17
0.55
4.38
0.58
2.50
1.00
2.29
2.00
4.38
2.10
4.38
Hammond QC15DTCB KVA
Amps
0.86
3.13
1.31
3.13
1.43
3.13
1.46
3.13
1.48
3.13
2.85
6.25
2.89
6.25
1.55
3.13
3.02
6.25
0.83
6.56
0.87
3.75
1.50
3.44
3.00
6.56
3.15
6.56
Hammond QC25DTCB KVA
Amps
1.44
5.21
2.18
5.21
2.38
5.21
2.43
5.21
2.46
5.21
4.76
10.42
4.81
10.42
2.58
5.21
5.03
10.42
1.38
10.94
1.44
6.25
2.50
5.73
5.00
10.94
5.25
10.94
Hammond QC50DTCB KVA
Amps
2.88
10.42
4.35
10.42
4.77
10.42
4.87
10.42
4.93
10.42
9.52
20.83
9.63
20.83
5.16
10.42
10.06
20.83
2.75
21.88
2.89
12.50
5.00
11.46
10.00
21.88
10.50
21.88
Hammond QC75DTCB KVA
Amps
4.31
15.63
6.53
15.63
7.15
15.62
7.30
15.63
7.39
15.63
14.27
31.25
14.44
31.25
7.73
15.63
15.09
31.25
4.13
32.81
4.33
18.75
7.50
17.91
15.00
32.81
15.75
17.19
Hammond Q1C0DTCB KVA
Amps
5.75
20.83
8.71
20.83
9.53
20.83
9.74
20.83
9.85
20.83
19.03
41.67
19.25
41.67
10.31
20.83
20.13
41.67
5.50
43.75
5.77
25.00
10.00
22.92
20.00
43.75
21.00
43.75
Hammond Q1C5DTCF KVA
Amps
8.63
31.25
13.06
31.25
14.30
31.25
14.61
31.25
14.78
31.25
28.55
62.50
28.88
62.50
15.47
31.25
30.19
62.50
8.25
65.63
8.66
37.50
15.00
34.37
30.00
65.63
31.50
65.63
Hammond Q002DTCF KVA
Amps
11.50
41.67
17.42
41.67
19.07
41.67
19.48
41.67
19.71
41.67
38.06
83.33
38.50
83.33
20.63
41.67
40.25
83.33
11.00
87.50
11.54
50.00
20.00
45.83
40.00
87.50
42.00
87.50
Hammond Q003DTCF KVA
Amps
17.25
62.50
26.13
62.50
28.60
62.50
29.22
62.50
29.56
62.50
57.09
125.00
57.75
125.00
30.94
62.50
60.38
125.00
16.50
131.25
17.31
75.00
30.00
68.75
60.00
131.25
63.00
131.25
Hammond Q005DTCF KVA
Amps
28.75
104.17
43.54
104.17
47.67
104.17
48.70
104.17
49.27
104.17
95.16
208.33
96.25
208.33
51.56
104.17
100.63
208.33
27.50
218.75
28.85
125.00
50.00
114.58
100.00
218.75
105.00
218.75
Catalog Number Conn.
Diag.
B D D D D C C D C C B D C C
  Output for lower voltage can be found by:  Rated Output Voltage
Rated Input Voltage
x  Input Actual Voltage = Output New Voltage.
 
Output KVA available at reduced voltage can be found by:  Actual Input Voltage
Rated Input Voltage
x  Output KVA = New KVA Rating.
 
Buck-Boost Transformer Selection Chart
240 x 480 Volts Primary–24/48 Volts Secondary
 Three Phase BOOSTING BUCKING
Line Voltage (Available)  399Y
230
380 430 440 460 460 480 480 440 440 460 460 460 480 500 500
Load Voltage (Available)  480Y
277
418 473 462 506 483 528 504 400 419 438 418 457 436 455 476
Click part # for info Conn.
Diag.
E G G H G H G H G H H G H G G H
Hammond QC05DTCB KVA
Amps
0.86
1.04
0.75
1.04
0.85
1.04
1.67
2.08
0.91
1.04
1.74
2.08
0.95
1.04
1.82
2.08
0.79
1.15
1.59
2.19
1.66
2.19
0.83
1.15
1.73
2.19
0.87
1.15
0.90
1.15
1.80
2.19
Hammond QC10DTCB KVA
Amps
1.73
2.08
1.51
2.08
1.71
2.08
3.33
4.17
1.83
2.08
3.49
4.17
1.91
2.08
3.64
4.17
1.59
2.29
3.18
4.38
3.32
4.38
1.66
2.29
3.46
4.38
1.73
2.29
1.80
2.29
3.61
4.38
Hammond QC15DTCB KVA
Amps
2.59
3.13
2.26
3.13
2.56
3.13
5.00
6.25
2.74
3.13
5.23
6.25
2.86
3.13
5.46
6.25
2.38
3.44
4.76
6.56
4.98
6.56
2.49
3.44
5.20
6.56
2.60
3.44
2.71
3.44
5.41
6.56
Hammond QC25DTCB KVA
Amps
4.32
5.21
3.77
5.21
4.27
5.21
8.34
10.42
4.56
5.21
8.71
10.42
4.76
5.21
9.09
10.42
3.97
5.73
7.94
10.94
8.30
10.94
4.15
5.73
8.66
10.94
4.33
5.73
4.51
5.73
9.02
10.94
Hammond QC50DTCB KVA
Amps
8.64
10.42
7.54
10.42
8.53
10.42
16.67
20.83
9.13
10.42
17.43
20.83
9.53
10.42
18.19
20.83
7.94
11.46
15.88
21.88
16.60
21.88
8.30
11.46
17.32
21.88
8.66
11.46
9.02
11.46
18.04
21.88
Hammond QC75DTCB KVA
Amps
12.96
15.62
11.31
15.63
12.80
15.63
25.01
31.25
13.69
15.63
26.14
31.25
14.29
15.63
27.28
31.25
11.91
17.19
23.82
32.81
24.90
32.81
12.45
17.19
25.98
32.81
12.99
17.19
13.53
17.19
27.06
32.81
Hammond Q1C0DTCB KVA
Amps
17.28
20.83
15.08
20.83
17.07
20.83
33.34
41.67
18.26
20.83
34.86
41.67
19.05
20.83
36.37
41.67
15.88
22.92
31.75
43.75
33.20
43.75
16.60
22.92
34.64
43.75
17.32
22.92
18.04
22.92
36.08
43.75
Hammond Q1C5DTCF KVA
Amps
25.92
31.25
22.62
31.25
25.60
31.25
50.01
62.50
27.39
31.25
52.29
62.50
28.58
31.25
54.66
62.50
23.82
34.38
47.63
65.63
49.80
65.63
24.90
34.38
51.96
65.63
25.98
34.37
27.06
34.37
54.13
65.63
Hammond Q002DTCF KVA
Amps
34.55
41.67
30.17
41.67
34.14
41.67
66.68
83.33
36.52
41.67
69.72
83.33
38.11
41.67
72.75
83.33
31.75
45.83
63.51
87.50
66.40
87.50
33.20
45.83
69.28
87.50
34.64
45.83
36.08
45.83
72.17
87.50
Hammond Q003DTCF KVA
Amps
51.83
62.50
45.25
62.50
51.20
62.50
100.03
125.00
54.78
62.50
104.57
125.00
57.16
62.50
109.12
125.00
47.63
68.75
95.26
131.25
99.59
131.25
49.80
68.75
103.92
131.25
51.96
68.75
54.13
68.75
108.25
131.25
Hammond Q005DTCF KVA
Amps
86.39
104.17
75.42
104.17
85.34
104.17
166.71
208.33
91.29
104.17
174.29
208.33
95.26
104.17
181.87
208.33
79.39
114.58
158.77
218.75
165.99
218.75
82.99
114.58
173.21
218.75
86.60
114.58
90.21
114.58
180.42
218.75
No. of Transformers 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Catalog Number Conn.
Diag.
E G G H G H G H G H H G H G G H
  Output for lower voltage can be found by:  Rated Output Voltage
Rated Input Voltage
x  Input Actual Voltage = Output New Voltage.
 
Output KVA available at reduced voltage can be found by:  Actual Input Voltage
Rated Input Voltage
x  Output KVA = New KVA Rating.
 

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