IEEE 519-2022 Table 2 limit on current distortion (TDD) at the PCC for systems from 120 V through 69 kV; the Isc/IL short-circuit ratio sets the row
5–20% TDDobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Table 2 covers PCC voltages from 120 V through 69 kV only. Table 3 applies above 69 kV through 161 kV and Table 4 above 161 kV, and both are tighter. Table 1 holds the voltage THD limits. Use the row for your actual PCC voltage and Isc/IL. |
| As of | 2022 |
| Source | IEEE Std 519-2022, Tables 1-4 (IEEE Standards Association) · Table 2: current distortion limits for systems rated 120 V through 69 kV; TDD runs from 5% to 20% by Isc/IL |
| Review | checking…review by 2027-02-06 · slow cadence |
| Recorded changes | last 2026-10-13 · 3 revisions tracked |
| Claim id | ieee-519-current-distortion-tdd-limit-at-the |
Where the guide uses it
- 4.4 Transformers, Harmonics & the AI Non-Linear-Load Problem
- 4.12 Metering, Power Quality, Monitoring & Electrical Operations
← Full numbers register — every date-stamped figure in the guide, with revision history.