IEEE 519 current-distortion (TDD) limit at the PCC, sliding with the Isc/IL short-circuit ratio; voltage THD capped at 5% (1–69 kV) / 8% (<1 kV)
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. |
|---|---|
| As of | 2022 |
| Source | Comsys · Table 2: PCC current-distortion limits for 120 V–69 kV systems; TDD varies from 5% to 20% by Isc/IL |
| Review | checking…review by 2027-02-06 · slow cadence |
| Recorded changes | last 2026-08-24 · 2 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.