We supply liquid filled pad mounted distribution transformers. 45 kVA is the smallest standard three phase pad mounted rating. 25 kVA is the smallest standard single phase pad mount. See three phase ratings and single phase ratings.
Full load current
| Configuration | Full load current |
|---|---|
| 480 V three phase | 18 A |
| 208 V three phase | 42 A |
| 240 V single phase | 63 A |
| 120 V single phase | 125 A |
Nameplate full load current, computed from the standard formula. Free to cite with a link to this page. Any other rating, use the kVA to amps calculator.
What this rating is
A 15 kVA transformer is normally a dry type unit, either a three phase 480 to 208Y/120 stepdown feeding a small panel, or a single phase 480 to 120/240 unit. It mounts on a wall, a floor stand or inside an enclosure, and is cooled by air rather than oil.
Almost all of the search volume on this rating is people working out its amperage. On three phase at 480 volts it is about 18 amps. On single phase at 240 volts it is about 63 amps. The three phase figure is far lower because the load is spread across three conductors.
Common questions
How many amps is a 15 kVA transformer
About 18 amps at 480 V three phase. About 42 amps at 208 V three phase. About 63 amps at 240 V single phase. About 125 amps at 120 V single phase. Three phase current is kVA times 1000 divided by the voltage times the square root of three. Single phase leaves out the square root of three, which is why the single phase figures are much higher.
What is a 15 kVA transformer used for
A 15 kVA transformer is normally a dry type unit, either a three phase 480 to 208Y/120 stepdown feeding a small panel, or a single phase 480 to 120/240 unit. It mounts on a wall, a floor stand or inside an enclosure, and is cooled by air rather than oil.
Is a 15 kVA transformer pad mounted
No, it is a dry type or control unit rather than a liquid filled pad mounted transformer. 45 kVA is the smallest standard three phase pad mounted rating. 25 kVA is the smallest standard single phase pad mount.