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Specifies oil-sampling procedures, analysis requirements and procedures, and recommends sensitivity, repeatability and accuracy criteria for the application of dissolved gas analysis (DGA) to factory testing of new power transformers, reactors and instrument transformers filled with mineral insulating oil when DGA testing has been specified. The most effective and useful application of DGA techniques to factory testing is during the performance of long-term tests, typically temperature-rise (heat run) and overloading tests on power transformers and reactors, also impulse tests on instrument transformers. DGA may also be valuable for over-excitation tests run over an extended period of time. Experience with DGA results, before and after short-time dielectric tests, indicates that DGA is normally less sensitive than electrical and acoustic methods for detecting partial discharges. However, DGA will indicate when these partial discharges become harmful to the insulation and may be detected by inspection [2]. This edition includes the following significant technical changes with respect to the previous edition: a) the specific procedures used during factory tests (sampling location, sampling frequency, gas extraction and chromatographic analysis in the laboratory) are described in more detail; b) information is provided in Annex A concerning the residual gas contents recommended before thermal tests on power transformers, typical gas values observed during the tests and cases where gas formation during the tests was followed by problems in the transformers; c) typical values observed during chopped lightning-impulse tests on instrument transformers are indicated in Annex B.
Determine the subscription format that is right for you.
Select the subscription format that is right for you. Table with 13 rows and 3 columns, identifies features available and not available for the two different subscription formats - CSA Advantage TM and CSA OnDemand TM
Includes all supported languages and archive versions
CSA AdvantageTM. feature not available. Includes all supported languages and archive versions
CSA OnDemandTM. feature available. Includes all supported languages and archive versions
My Files - create customized files by adding multiple clauses, tables or figures from the standard into your own personal File for quick reference
CSA AdvantageTM. feature available. My Files - create customized files by adding multiple clauses, tables or figures from the standard into your own personal File for quick reference
CSA OnDemandTM. feature not available. My Files - create customized files by adding multiple clauses, tables or figures from the standard into your own personal File for quick reference
Toggle between your files and the full standard to maintain context
CSA AdvantageTM. feature available. Toggle between your files and the full standard to maintain context
CSA OnDemandTM. feature not available. Toggle between your files and the full standard to maintain context
Instantly preview cross referenced material within the book
CSA AdvantageTM. feature available. Instantly preview cross referenced material within the book
CSA OnDemandTM. feature not available. Instantly preview cross referenced material within the book
Export personal notes to Excel
CSA AdvantageTM. feature available. Export personal notes to Excel
CSA OnDemandTM. feature not available. Export personal notes to Excel
Transfer notes and highlights when updates are available
CSA AdvantageTM. feature available. Transfer notes and highlights when updates are available
CSA OnDemandTM. feature not available. Transfer notes and highlights when updates are available
Adobe Reader PDF and browser compatible for iOS and Android
CSA AdvantageTM. feature not available. Adobe Reader PDF and browser compatible for iOS and Android
CSA OnDemandTM. feature available. Adobe Reader PDF and browser compatible for iOS and Android