Safety issues related to the connection of MV and HV grounding systems outside substations
Bibliographic record
Abstract
In recent years, there has been an explosive growth of mobile telephone systems. In urban areas, antennas are seen on tall buildings and structures. In rural areas, the options are limited and high voltage (HV) towers represent an interesting alternative. Antennas started to appear in HV towers two to three years ago and their number will increase rapidly over the next few years. Different safety related questions arise from these installations. The antenna system requires both power and a link to the telephone system. The system is fed from a MV line. The question arising from feeding mobile telephone systems in HV towers is whether the connection of MV and HV grounding systems should extend outside substations or an isolation transformer be used; the main concern is related to touch voltages in MV and LV installations during a fault on the HV tower. This question had led Hydro Quebec to initiate a project aimed at determining the most appropriate method to feed loads in HV towers. It includes a computer analysis and field tests.
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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 | 0.006 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
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".