Winding eddy-current heating from the 5th, 7th and 13th harmonics relative to the fundamental at equal RMS current; it scales with harmonic order squared
≈25x / 49x / 169xderived
| Value kind | derived — Derived values are guide calculations; their result is only as fixed as the stated inputs, scope, and method. |
|---|---|
| Scope | Covers winding eddy-current loss only, not total transformer heating. Other stray losses rise more slowly, roughly with harmonic order to the power 0.8. |
| As of | 2026-10 |
| Source | Guide derivation: winding eddy-current loss proportional to harmonic order squared at equal RMS current (IEEE C57.110 method) |
| Review | checking…review by 2028-10-13 · standard cadence |
| Recorded changes | last 2026-10-13 · 2 revisions tracked |
| Claim id | eddy-current-heating-multiplier-of-the-5th-7th |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.