IEEE DRAFT C57.104 : D11D 2004
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
GUIDE FOR THE INTERPRETATION OF GASES IN OIL IMMERSED TRANSFORMERS
02-02-2009
01-12-2013
Introduction
1. Overview
1.1 Scope
1.2 Limitations
2. References
3. Definitions
4. General decomposition theory
4.1 Cellulose decomposition
4.2 Mineral oil decomposition
5. Combustible gas generation in equipment
5.1 Thermal fault
5.2 Thermal faults involving cellulose
5.3 Electrical faults
5.4 Sampling and laboratory procedures
5.5 Variability and precision of analysis
6. Detection and operating guidelines
6.1 Detection procedure for transformers in Type 1 category
6.2 Detection procedure for Type 2 transformers
7. Diagnosis of transformer faults
7.1 Analysis in the caution surveillance range
7.2 Diagnosis in the warning surveillance range
7.3 Diagnosis of cellulose decomposition
8. Trend and graphical analysis
8.1 Construction of a 3 D graph
9. Detection and analysis of gases in gas space, relay or other
fixed or portable devices
Annex A (Normative) TCG detection and operating procedure
Annex B (Normative) TCG diagnosis of fault type
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