IEEE C57.146:2005
Current
The latest, up-to-date edition.
INTERPRETATION OF GASES GENERATED IN SILICONE-IMMERSED TRANSFORMERS
Hardcopy , PDF
English
03-10-2006
1 Overview
1.1 Scope
1.2 Purpose
2 Normative references
3 Definitions, acronyms, and abbreviations
3.1 Definitions
3.2 Acronyms and abbreviations
4 General theory
4.1 General
4.2 Causes of gas formation
4.3 Application to equipment
4.4 Establishing baseline data
4.5 Recognition of a gassing problem
5 Procedures for obtaining samples of silicone liquid from
the transformer and for laboratory analysis
5.1 Sampling of silicone liquid
5.2 Determination of total dissolved gas
5.3 Determination of individual dissolved gases
6 Suggested operating procedures utilizing the detection and
analysis of combustible gases
6.1 General
6.2 Evaluation of transformer condition using individual and
TDCG concentrations
6.3 Determining the operating procedure and sampling interval
from the TDCG levels
6.4 Evaluation of possible fault type by the key gas method
Annex A (informative) Gas solubility
Annex B (informative) Key gas sources-based on averages
from small- and large-scale experiments
B.1 Thermal fluid
B.2 Thermal cellulose
B.3 Electrical partial discharge
B.4 Electrical arcing
Annex C (informative) Example
Annex D (informative) Bibliography
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