Introduction
1 Scope
2 Normative references
3 Definitions and abbreviations
4 Mechanisms of gas formation
5 Identification of faults
6 Conditions for calculating ratios
7 Application to free gases in gas relays
8 Gas concentration levels in service
9 Recommended method of DGA interpretation (figure 1)
10 Report of results
Annex A (informative) Equipment application notes
Annex B (informative) Graphical representation of gas
ratios
Annex C (informative) Bibliography
Annex ZA (normative) Normative references to international
publications with their corresponding
European publications
Figure 1 - Flow chart
Figure B.1 - Graphical representation 1 of gas ratios
Figure B.2 - Graphical representation 2 of gas ratios
Figure B.3 - Graphical representation 3 of gas ratios -
Duval's triangle