1. 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 toperform 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.
2. Referenced Documents
2.1 ASTM Standards:
D2140 Test Method for Carbon-Type Composition of Insulating Oils of Petroleum Origin
D2300 Test Method for Gassing of Insulating Oils Under Electrical Stress and Ionization Modified Pirelli Method
D2779 Test Method for Estimation of Solubility of Gases in Petroleum Liquids
D2780 Test Method for Solubility of Fixed Gases in Liquids
D3613 Test Methods of Sampling Electrical Insulating Oils for Gas Analysis and Determination of Water Content
D4051 Practice for Preparation of Low-Pressure Gas Blends
E260 Practice for Packed Column Gas Chromatography
2.2 IEEE Standard:
C 57.104 Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers
2.3 IEC Standard:
Publication No. 567 Guide for the Sampling of Gases and of Oil from Oil-Filled Electrical Equipment and for the Analysis of Free and Dissolved Gases
