ASTM-D3612 › Historical Revision Information
Standard Test Method for Analysis of Gases Dissolved in Electrical Insulating Oil by Gas Chromatography
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Scope
1.1 This test method covers three procedures for extraction and measurement of gases dissolved in electrical insulating oil having a viscosity of 20 cSt (100 SUS) or less at 40°C (104°F), and the identification and determination of the individual component gases extracted. Other methods have been used to perform this analysis.
1.2 The individual component gases that may be identified and determined include:
| Hydrogen—H2 |
| Oxygen—O2 |
| Nitrogen—N2 |
| Carbon monoxide—CO |
| Carbon dioxide—CO2 |
| Methane—CH4 |
| Ethane—C2H6 |
| Ethylene—C2H4 |
| Acetylene—C2H2 |
| Propane—C3H8 |
| Propylene—C3H6 |
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific warning statements see 6.1.8, 30.2.2 and 30.3.1.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Significance and Use
5.1 Oil and oil-immersed electrical insulation materials may decompose under the influence of thermal and electrical stresses, and in doing so, generate gaseous decomposition products of varying composition which dissolve in the oil. The nature and amount of the individual component gases that may be recovered and analyzed may be indicative of the type and degree of the abnormality responsible for the gas generation. The rate of gas generation and changes in concentration of specific gases over time are also used to evaluate the condition of the electric apparatus.
Note 1: Guidelines for the interpretation of gas-in-oil data are given in IEEE C57.104.
Keywords
capillary columns; combustible gases; dissolved gases; gases; headspace; insulating oil; oil; transformer oil;; ICS Number Code 29.040.10 (Insulating oils)
To find similar documents by ASTM Volume:
10.03 (Electrical Insulating Liquids and Gases; Electrical Protective Equipment)
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Document Number
ASTM-D3612-02(2017)
Revision Level
2002 R17 EDITION
Status
Current
Modification Type
Reapproval
Publication Date
Dec. 15, 2017
Document Type
Test Method
Page Count
22 pages
Committee Number
D27.03