 |
J.H. Larson Company | |
 |
||
| Acme Buck-Boost Transformer Selection
Chart 240x480 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 | 480 | 480 | 500 | 500 | |
| Load Voltage (Output) | 480Y 277 |
420 | 473 | 462 | 506 | 483 | 528 | 504 | 400 | 419 | 438 | 418 | 457 | 436 | 455 | 477 | |
| Quanity Required | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
| Catalog Number |
Connection Diagram |
F-F | B-B | B-B | G-G | B-B | G-G | B-B | G-G | E-E | C-C | C-C | E-E | C-C | E-E | E-E | C-C |
| T-1-81061 0.05 KVA |
KVA Amps Fuse/Breaker |
0.86 1.04 3 |
0.76 1.04 3 |
0.85 1.04 3 |
1.66 2.08 6 |
0.91 1.04 3 |
1.74 2.08 6 |
0.95 1.04 3 |
1.82 2.08 6 |
0.79 1.14 3 |
1.58 2.18 6 |
1.66 2.18 3 |
0.83 1.14 3 |
1.73 2.18 6 |
0.86 1.14 3 |
0.90 1.14 3 |
1.80 2.18 6 |
| T-1-81062 0.10 KVA |
KVA Amps Fuse/Breaker |
1.73 2.08 6 |
1.51 2.08 6 |
1.70 2.08 6 |
3.33 4.16 10 |
1.82 2.08 6 |
3.48 4.16 10 |
1.90 2.08 6 |
3.63 4.16 10 |
1.59 2.29 6 |
3.17 4.37 10 |
3.31 4.37 10 |
1.66 2.29 6 |
3.46 4.37 10 |
1.73 2.29 6 |
1.80 2.29 6 |
3.61 4.37 10 |
| T-1-81063 0.15 KVA |
KVA Amps Fuse/Breaker |
2.60 3.12 10 |
2.27 3.12 6 |
2.56 3.12 6 |
4.99 6.24 15 |
2.73 3.12 6 |
5.22 6.25 15 |
2.85 3.12 6 |
5.45 6.24 15 |
2.38 3.43 6 |
4.75 6.55 15 |
4.97 6.55 15 |
2.48 3.43 6 |
5.19 6.55 15 |
2.59 3.43 6 |
2.70 3.43 6 |
5.41 6.55 15 |
| T-1-81064 0.25 KVA |
KVA Amps Fuse/Breaker |
4.33 5.20 15 |
3.78 5.20 10 |
4.26 5.20 10 |
8.32 10.40 15 |
4.56 5.20 10 |
8.70 10.40 15 |
4.76 5.20 10 |
9.08 10.40 15 |
3.96 5.72 10 |
7.92 10.92 15 |
8.28 10.92 15 |
4.14 5.72 10 |
8.64 10.92 15 |
4.32 5.72 10 |
4.51 5.72 10 |
9.02 10.92 15 |
| T-1-81065 0.50 KVA |
KVA Amps Fuse/Breaker |
8.60 10.40 20 |
7.56 10.40 15 |
8.52 10.40 15 |
16.64 20.80 30 |
9.11 10.40 15 |
17.40 20.80 30 |
9.51 10.40 15 |
18.16 20.80 30 |
7.93 11.44 15 |
15.85 21.84 30 |
16.57 21.84 30 |
8.28 11.44 15 |
17.29 21.84 30 |
8.64 11.44 15 |
9.02 11.44 15 |
18.04 21.84 30 |
| T-1-81066 0.75 KVA |
KVA Amps Fuse/Breaker |
12.90 15.60 25 |
11.34 15.60 25 |
12.77 15.60 25 |
24.97 31.20 45 |
13.67 15.60 25 |
26.10 31.20 45 |
14.27 15.60 25 |
27.24 31.20 45 |
11.89 17.16 20 |
23.77 32.76 40 |
24.85 32.76 40 |
12.42 17.16 20 |
25.93 32.76 40 |
12.96 17.16 20 |
13.52 17.16 20 |
27.07 32.76 40 |
| T-1-37920 1.00 KVA |
KVA Amps Fuse/Breaker |
17.30 20.80 35 |
15.12 20.80 30 |
17.03 20.80 30 |
33.29 41.60 60 |
18.23 20.80 30 |
34.80 41.60 60 |
19.02 20.80 30 |
36.31 41.60 60 |
15.85 22.88 30 |
31.70 43.68 60 |
33.14 43.68 60 |
16.57 22.88 30 |
34.57 43.68 60 |
17.28 22.88 30 |
18.03 22.88 30 |
36.09 43.68 60 |
| T-1-37921 1.50 KVA |
KVA Amps Fuse/Breaker |
25.90 31.20 50 |
22.69 31.20 45 |
25.55 31.20 45 |
49.93 62.40 90 |
27.34 31.20 45 |
52.20 62.40 90 |
28.53 20.80 30 |
54.47 62.40 90 |
23.78 34.32 40 |
47.55 65.52 80 |
49.71 65.52 80 |
24.85 34.32 40 |
51.86 65.52 80 |
25.92 34.32 40 |
27.05 34.32 40 |
54.13 65.52 80 |
| T-1-37922 2.00 KVA |
KVA Amps Fuse/Breaker |
34.60 41.60 70 |
30.25 41.60 60 |
34.07 41.60 60 |
66.58 83.20 110 |
36.46 41.60 60 |
69.90 83.20 110 |
38.04 41.60 60 |
72.63 83.20 110 |
31.70 45.76 60 |
63.40 87.36 110 |
66.27 87.36 110 |
33.13 45.76 60 |
69.15 87.36 110 |
34.56 45.76 60 |
36.06 45.76 60 |
72.18 87.36 110 |
| T-1-37923 3.00 KVA |
KVA Amps Fuse/Breaker |
52.00 62.50 100 |
45.45 62.50 90 |
51.18 62.50 90 |
100.03 125.00 175 |
54.69 62.50 90 |
104.57 125.00 175 |
57.07 62.50 90 |
109.12 125.00 175 |
47.63 68.75 80 |
95.25 131.25 175 |
99.57 131.25 175 |
49.77 68.75 80 |
103.89 131.25 175 |
51.92 68.75 80 |
54.18 68.75 80 |
108.44 131.25 175 |
| T-1-37924 5.00 KVA |
KVA Amps Fuse/Breaker |
86.10 104.00 175 |
75.62 104.00 150 |
85.17 104.00 150 |
166.44 208.00 300 |
91.15 104.00 150 |
174.01 208.00 300 |
95.11 104.00 150 |
181.57 208.00 300 |
79.26 114.40 150 |
158.50 218.40 300 |
165.69 218.40 300 |
82.83 114.40 150 |
172.87 218.40 300 |
86.39 114.40 150 |
90.16 114.40 150 |
180.44 218.40 300 |
| T-2-43570 7.50 KVA |
KVA Amps Fuse/Breaker |
129.30 156.00 250 |
113.43 156.00 225 |
127.75 156.00 225 |
249.66 312.00 450 |
136.72 156.00 225 |
261.01 312.00 450 |
142.67 156.00 225 |
272.36 312.00 450 |
118.79 171.60 200 |
237.75 327.60 400 |
248.53 327.60 400 |
124.24 171.60 200 |
259.31 327.60 400 |
129.59 171.60 200 |
135.23 171.60 200 |
270.66 327.60 400 |
| T-2-43571[1] 10.00 KVA |
KVA Amps Fuse/Breaker |
173.10 208.00 350 |
151.25 208.00 300 |
170.33 208.00 300 |
332.89 416.00 600 |
182.29 208.00 300 |
348.02 416.00 600 |
190.22 208.00 300 |
363.15 416.00 600 |
158.52 228.80 300 |
317.00 436.80 600 |
331.37 436.80 600 |
165.65 228.80 300 |
345.751 436.80 600 |
172.78 228.80 300 |
180.31 228.80 300 |
360.88 436.80 600 |
| Catalog Number |
Connection Diagram |
F-F | B-B | B-B | G-G | B-B | G-G | B-B | G-G | E-E | C-C | C-C | E-E | C-C | E-E | E-E | C-C |
| Quanity Required | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
| Note: | Inputs and outputs may be reversed; KVA remains constant. All applications in black are suitable for 50/60 Hz. All applications in red are suitable for 60 Hz. only. |
| [1] | It is necessary to utilize multiple conductors on the secondary (X1, X2, X3, and X4) terminals of this transformer. |