We supply liquid filled pad mounted distribution transformers. Outdoors on a pad, the smallest three phase rating is 45 kVA. See three phase ratings and single phase ratings.
Full load current
| Configuration | Full load current |
|---|---|
| 480 V three phase | 24 A |
| 208 V three phase | 56 A |
| 240 V single phase | 83 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 20 kVA transformer is a dry type unit sitting between control sizes and small distribution. It feeds a modest 208Y/120 panel or a single piece of equipment.
About 24 amps at 480 volts three phase. This is a common size where a tenant needs a small 120 volt panel off a 480 volt house service.
Common questions
How many amps is a 20 kVA transformer
About 24 amps at 480 V three phase. About 56 amps at 208 V three phase. About 83 amps at 240 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 20 kVA transformer used for
A 20 kVA transformer is a dry type unit sitting between control sizes and small distribution. It feeds a modest 208Y/120 panel or a single piece of equipment.
Is a 20 kVA transformer pad mounted
No, it is a dry type unit rather than a liquid filled pad mounted transformer. Outdoors on a pad, the smallest three phase rating is 45 kVA.