Evolution of Slot Partial Discharges under Electrical, Thermal and Mechanical Stresses
Bibliographic record
Abstract
To improve the understanding of slot partial discharges (PD) activity in air-cooled generators, an accelerated aging test was conducted under different stress conditions on a total of six stator bars. The bars, which had been previously modified by the abrasion of a portion of their semi-conductive coating in order to create slot PD activity, were divided into three groups of two. The first group was electrically stressed at 16 kV AC while the second was both electrically and thermally stressed at 85degC by a circulating current. The last group was electrically and thermally stressed but, in addition, exposed to mechanical abrasion caused by lamination stacks vibrating on the bare insulation where slot PD were occurring. Partial discharge measurements were recorded at room temperature for each of the six bars separately as a function of aging time. Comparison of the change in the PD patterns reveals the differences in degradation when one stress or a combination of stresses is present.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".