Protective Relay Settings: online_pd_assessment
Protective relay settings, coordination parameters, and motor/bus protection data per IEEE C37, IEEE 242, IEC 60255, and IEEE 3004 series. Covers: IEEE C37.112 inverse time-overcurrent curve constants (A, B, p, tr) and IEC 60255-151 constants (k, alpha); CT accuracy classes C100/C200/C400/C800 per IEEE C57.13; relay pickup guidance by ANSI device number; CTI per IEEE 242; motor nameplate voltages, surge withstand levels, vibration limits, and relay alarm/trip thresholds per IEEE 3004.8-2016; ANSI device function numbers for motor and bus protection (Tables B.1/B.2/B.3); online partial discharge assessment thresholds; and dual-tie bus differential CT scheme fault response results per IEEE 3004.11-2019.
| parameter type | record id | olpd activity nC per cycle (nC/cycle) | pd condition | peak pd level nC (nC) | standard |
|---|---|---|---|---|---|
| online_pd_assessment | pd_acceptable | 250 to 499 | Still acceptable | 10 to 15 | IEEE Std 3004.8-2016 |
| online_pd_assessment | pd_average | 100 to 249 | Average | 4 to 10 | IEEE Std 3004.8-2016 |
| online_pd_assessment | pd_excellent | < 50 | Excellent | < 2 | IEEE Std 3004.8-2016 |
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