IEEE C57.139 2016
$30.33
IEEE Guide for Dissolved Gas Analysis in Transformer Load Tap Changers
| Published By | Publication Date | Number of Pages |
| IEEE | 2016 | 45 |
Revision Standard – Active. General types of load tap changer (LTC) mechanisms, breathing configurations, and electrical designs, described for reference for determining methods of testing and evaluating dissolved gases in mineral-based transformer oils in LTCs, are discussed and recommended in this guide. Measurements of dissolved gas concentrations in the LTC oil are required to implement this guide. This guide is not manufacturer specific, rather category specific. ** Downloads file posted at http://standards.ieee.org/downloads/C57/C57.139-2015/
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C57.139-2015 Front cover |
| 2 | Title page |
| 4 | Important Notices and Disclaimers Concerning IEEE Standards Documents |
| 7 | Participants |
| 10 | Introduction |
| 11 | Contents |
| 12 | IMPORTANT NOTICE 1. Overview 1.1 Scope 1.2 Purpose |
| 13 | 1.3 Limitations 1.4 Safety warning 2. Normative references |
| 14 | 3. Definitions |
| 15 | 4. Nature, purpose, and basis for DGA for LTCs 4.1 Nature of LTC DGA 4.2 Purpose of LTC DGA 4.3 Gas formation, retention, and dissipation |
| 16 | 4.4 Basis of LTC DGA |
| 17 | 5. Norms for LTC DGA 5.1 LTC DGA variables 5.2 Types of limits |
| 19 | 5.3 Maintenance of LTC DGA norms 6. Procedure for interpretation of LTC DGA data 6.1 Types of samples |
| 20 | 6.2 Data quality review 6.3 Interpretation of DGA data |
| 23 | Annex A (informative) Generic classification scheme for LTC types |
| 24 | Annex B (informative) Sample procedures for statistical derivation of limits B.1 Statistical terminology and basis of the derivation procedures |
| 26 | B.2 Derivation of gas concentration caution limits B.3 Derivation of gas ratio limits |
| 28 | B.4 Examples of LTC DGA limit derivations |
| 30 | Annex C (informative) Case histories C.1 Norms used for Examples 1 and 2 |
| 31 | C.2 Example 3—Burned reversing switch |
| 32 | C.3 Example 4—Burned contact in vacuum type LTC |
| 34 | Annex D (informative) Application of the Duval Triangle 2 to DGA in LTCs D.1 Introduction |
| 35 | D.2 Data plotting example |
| 36 | D.3 Fault evolution example D.4 Exceptional LTC types |
| 38 | D.5 LTC population example |
| 39 | Annex E (informative) Gas ratio nomograms for DGA in LTCs E.1 Introduction E.2 Nitrogen / oxygen ratio |
| 44 | Annex F (informative) Bibliography |
