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DOE Covered Transformer Checker: 10 CFR 431.192
Federal efficiency rules do not reach every liquid-filled transformer on a pad. Four conditions have to hold at once, and two ordinary-looking spec choices push a unit outside coverage by name. Enter your parameters to see which side of the line your spec falls on, and why.
Your specification
A conventional padmount at plus or minus two 2.5 percent taps totals 10 percent.
Leave at the design value your drawing calls for.
Read the source yourself: the definition, the exclusion list and the normal impedance table all sit in 10 CFR 431.192, and the efficiency values in 10 CFR 431.196. This tool applies those tests; it is not legal advice and it does not replace your own reading of the current text.
Coverage verdict
Fill in the parameters and press check. Each of the four conditions and both exclusion traps are reported separately, so you can see exactly which one decides the answer.
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