SF/sub 6/-free 550 kV combined optical voltage and current transducer system
Bibliographic record
Abstract
A three-phase optical voltage and current transducer system (NXVCT) for accurate metering of a 550 kV power transmission line is described. Extensive laboratory tests were performed on these units. Accuracy tests on the optical voltage transducers (OVTs) show compliance with IEC 0.1% class requirements with respect to linearity over the extended dynamic range of 10%-150% rated voltage, and with respect to accuracy over temperature, from -40 /spl deg/C to +60 /spl deg/C. The NXVCTs also passed a series of standard high-voltage type and routine tests, including one-minute AC withstand at 800 kV, lightning impulse tests at 1800 kV, chopped impulses at 2070 kV, wet switching impulses at 1250 kV, and RIV tests. This NXVCT system is now installed in a 500 kV substation.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.016 | 0.004 |
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".