IEEE C57.104 1992

$58.50

IEEE Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers

Published By	Publication Date	Number of Pages
IEEE	1992	37

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Description

Revision Standard – Inactive – Withdrawn. Withdrawn Standard. Withdrawn Date: Feb 06, 2006. Detailed procedures for analyzing gas from gas spaces or gas-collecting devices as well as gas dissolved in oil are described. The procedures cover: (1) the calibration and use of field instruments for detecting and estimating the amount of combustible gases present in gas blankets above oil, or in gas detector relays; (2) the use of fixed instruments for detecting and determining the quantity of combustible gases present in gas-blanketed equipment; (3) obtaining samples of gas and oil from the transformer for laboratory analysis; (4) laboratory methods for analyzing the gas blanket and the gases extracted from the oil; and (5) interpreting the results in terms of transformer serviceability. The intent is to provide the operator with positive and useful information concerning the serviceability of the equipment. An extensive bibliography on gas evolution, detection, and interpretation is included.

PDF Catalog

PDF Pages	PDF Title
4	Introduction Participants
7	CONTENTS
8	1. Introduction 1.1 Scope
9	1.2 Limitations 1.3 References 1.4 Definitions
10	2. General Theory 2.1 Cellulosic Decomposition 2.2 Oil Decomposition
11	2.3 Application to Equipment
12	2.4 Establishing Baseline Data 2.5 Recognition of a Gassing Problem—Establishing Operating Priorities 3. Interpretation of Gas Analysis 3.1 Thermal Faults 3.2 Electrical Faults—Low Intensity Discharges
13	3.3 Electrical Faults—High Intensity Arcing 4. Suggested Operating Procedures Utilizing the Detection and Analysis of Combustible Gases 4.1 Determining Combustible Gas Generating Rules
15	4.2 Determining the Gas Space and Dissolved Gas-in-Oil Equivalents 4.3 Monitoring Insulation Deterioration Using Dissolved Gas Volume
16	4.4 Evaluation of Transformer Condition Using Individual and TDCG Concentrations
19	4.5 Evaluation of Possible Fault Type by the Key Gas Method
21	4.6 Evaluation of Possible Fault Type by Analysis of the Separate Combustible Gases Generated
23	5. Instruments for Detecting and Determining the Amount of Combustible Gases Present 5.1 Portable Instruments
24	5.2 Fixed Instruments
26	6. Procedures for Obtaining Samples of Gas and Oil From the Transformer for Laboratory Analysis 6.1 Gas Samples for Laboratory Analysis 6.2 Gas Dissolved in Oil 7. Laboratory Methods for Analyzing the Gas Blanket and the Gases Extracted From the Oil 7.1 Determination of Total Dissolved Gas 7.2 Determination of Individual Dissolved Gases 7.3 Determination of Individual Gases Present in the Gas Blanket
27	8. Bibliography 8.1 Sources 8.2 Gas Evolution
29	8.3 Detection and Interpretation