Standard Historical Last Updated: Dec 31, 2010 Track Document
ASTM D3612-02

Standard Test Method for Analysis of Gases Dissolved in Electrical Insulating Oil by Gas Chromatography

Standard Test Method for Analysis of Gases Dissolved in Electrical Insulating Oil by Gas Chromatography D3612-02 ASTM|D3612-02|en-US Standard Test Method for Analysis of Gases Dissolved in Electrical Insulating Oil by Gas Chromatography Standard new BOS Vol. 10.03 Committee D27
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Significance and Use

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.

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 and health 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.

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Details
Book of Standards Volume: 10.03
Developed by Subcommittee: D27.03
Pages: 22
DOI: 10.1520/D3612-02
ICS Code: 29.040.10