Table of Contents

1 Overview
  1.1 Scope
  1.2 Limitations
2 Normative references
3 Definitions, acronyms, and abbreviations
  3.1 Definitions
  3.2 Acronyms and abbreviations
4 General theory
  4.1 Cellulosic decomposition
  4.2 Oil decomposition
  4.3 Application to equipment
  4.4 Establishing baseline data
  4.5 Recognition of a gassing problem - Establishing operating
      priorities
5 Interpretation of gas analysis
  5.1 Thermal faults
  5.2 Electrical faults - Low intensity discharges
  5.3 Electrical faults - High intensity arcing
6 Suggested operating procedures utilizing the detection
  and analysis of combustible gases
  6.1 General
  6.2 Determining combustible gas generating rates
  6.3 Determining the gas space and dissolved gas-in-oil
      equivalents
  6.4 Monitoring insulation deterioration using dissolved
      gas volume
  6.5 Evaluation of transformer condition using individual and
      TDCG concentrations
  6.6 Evaluation of possible fault type by the key gas method
  6.7 Evaluation of possible fault type by analysis of the
      separate combustible gases generated
7 Instruments for detecting and determining the amount of
  combustible gases present
  7.1 Portable instruments
  7.2 Fixed instruments
8 Procedures for obtaining samples of gas and oil from
  the transformer for laboratory analysis
  8.1 Gas samples for laboratory analysis
  8.2 Gas dissolved in oil
9 Laboratory methods for analyzing the gas blanket and
  the gases extracted from the oil
  9.1 General
  9.2 Determination of total dissolved gas
  9.3 Determination of individual dissolved gases
  9.4 Determination of individual gases present in the
      gas blanket
Annex A (informative) Bibliography

Abstract

Describes procedures for analyzing gas from gas spaces or gas-collecting devices as well as gas dissolved in oil.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN
Supersedes	IEEE DRAFT C57.104 : D11D 2004