IEEE C57.139 2011

$37.38

IEEE Guide for Dissolved Gas Analysis in Transformer Load Tap Changers

Published By	Publication Date	Number of Pages
IEEE	2011	32

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Description

New IEEE Standard – Active. Methods of testing and evaluating dissolved gases in mineral based transformer oils found in Load Tap Changers (LTCs) are discussed and recommended in this guide. General types of LTC mechanisms, breathing configurations and electrical design are included as evaluation criteria for determining when mechanical damage or failure has occurred. Dissolved Gas of the LTC is required. This guide is not manufacturer specific, rather category specific. Additional files for download can be found at http://standards.ieee.org/downloads/C57/C57.139-2010/

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C57.139-2010 Front Cover
3	Title Page
6	Introduction Notice to users Laws and regulations Copyrights Updating of IEEE documents
7	Errata Interpretations Patents
8	Participants
10	Contents
11	Important Notice 1. Overview 1.1 Scope 1.2 Purpose
12	1.3 Limitations 1.4 Safety warning 2. Definitions
13	3. Nature, purpose, and basis for DGA for LTCs 3.1 Nature of LTC DGA 3.2 Purpose of LTC DGA
14	3.3 Gas formation, retention, and dissipation
15	3.4 Basis of LTC DGA 4. Norms for LTC DGA 4.1 LTC DGA variables
16	4.2 Types of limits
17	4.3 Maintenance of LTC DGA norms 5. Procedure for interpretation of LTC DGA data 5.1 Types of samples
18	5.2 Data quality review 5.3 Interpretation of DGA data
21	Annex A (informative) Generic classification scheme for LTC types
22	Annex B (informative) Suggested procedures for statistical derivation of limits B.1 Statistical terminology and basis of the derivation procedures
24	B.2 Derivation of gas concentration caution limits B.3 Derivation of gas ratio limits
26	B.4 Examples of LTC DGA limit derivations
28	Annex C (informative) Case histories C.1 Norms used for Examples 1 and 2
29	C.2 Example 3—Burned reversing switch
30	C.3 Example 4—Burned contact in vacuum interrupter type LTC
32	Annex D (informative) Bibliography