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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:

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.

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.

Keywords

capillary columns; combustible gases; dissolved gases; gases; headspace; insulating oil; oil; transformer oil; Dissolved gases; Electrical insulating oils; Gas chromatography (GC)--insulating materials/applications; Gas content; 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)

To find similar documents by classification:

29.040.10 (Insulating oils)

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