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Record W2124192718 · doi:10.1109/elinsl.2010.5549795

Repair of a damaged 300 MVA machine

2010· article· en· W2124192718 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

Venuenot available
Typearticle
Languageen
FieldEngineering
TopicNon-Destructive Testing Techniques
Canadian institutionsManitoba Hydro
Fundersnot available
KeywordsStatorRotor (electric)Electromagnetic coilCore (optical fiber)Line (geometry)Electrical engineeringAutomotive engineeringFault (geology)EngineeringComputer scienceGeologyTelecommunications

Abstract

fetched live from OpenAlex

A stator ground fault occurred in a hydrogen cooled synchronous condenser rated 300 MVA. This was as a result of a small metallic object that had been left in the rotor during an overhaul. The object had entered the air gap and damaged the end arms of three stator bars, one of which failed. The OEM patched the three stators bars. A series of off-line electrical tests were performed to assess the adequacy of the repair. One patch failed and had to be reapplied. There was concern about possible damage to the stator core and the field poles. A robotic inspection vehicle and camera were rented to examine all 132 teeth of the core over its 3.95 m length as well as the poles. Areas were observed and photographed where there was visual evidence of possible damage. The inspection vehicle was used to move the sensing coil of our digital EL CID along stator core teeth where there was the most evidence of damage. The information obtained indicated that the damage was not sufficient to warrant removing the rotor. This decision greatly reduced the duration and cost of the repair. Upon return to service on-line partial discharge measurements were made from directional bus couplers as well as from stator slot couplers with the machine operating in air and in hydrogen.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.451
Threshold uncertainty score0.297

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.007
GPT teacher head0.225
Teacher spread0.218 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Quick stats

Citations5
Published2010
Admission routes1
Has abstractyes

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