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Significance and Use
4.1 The gas content of cable and capacitor oils is considered to be important, since the evolution of gas in the form of bubbles can have an adverse effect on the insulating properties of these fluids. It is customary to degas these oils prior to use, and this test method provides a means of determining the gas content before and after degassing.
1.1 This test method covers the determination of the gas content of electrical insulating oils of low and medium viscosities in the general range up to 190 mm2/s at 104°F [40°C], such as are used in capacitors and paper-insulated electric cables and cable systems of the oil-filled type. The determination of gas content is desirable for any insulating oil having these properties and intended for use in a degassed state.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D2945 Test Method for Gas Content of Insulating Oils
ICS Number Code 29.040.10 (Insulating oils)
UNSPSC Code 15121505(Transformer oil or insulating oil); 32121500(Capacitors)
ASTM D831 / D831M-12, Standard Test Method for Gas Content of Cable and Capacitor Oils, ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top