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This test method covers a laboratory technique that measures the stability of new, used, or reclaimed insulating oils, similar to those described in Specification D3487 in the presence of a controlled electric discharge.
Formerly under the jurisdiction of Committee D27 on Electrical Insulating Liquids and Gases, this test method was withdrawn in January 2014 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
1.1 This test method covers a laboratory technique that measures the stability of new, used, or reclaimed insulating oils, similar to those described in Specification D 3487 in the presence of a controlled electric discharge. When subjected to this type of discharge, insulating oils absorb energy and produce gases as well as ionized molecules (charge carriers). The quantity of these decay products can be measured and can provide an indication of the stability of oils under the conditions of this test.
1.2 The gases are retained in the discharge cell and their pressure measured. The charge carriers remain in the test specimen. The change in the dissipation factor before and after the discharge is determined.
1.3 The values stated in SI units are to be regarded as the standard. The values stated in parentheses are for information only.
1.4 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D923 Practices for Sampling Electrical Insulating Liquids
D924 Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids
D3487 Specification for Mineral Insulating Oil Used in Electrical Apparatus
IEEE Standard4–1995 IEEE Standard Techniques for High-Voltage Testing Available from the Institute of Electrical and Electronic Engineers, Inc., P.O. Box 1331, Piscataway, NJ 08855.
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ASTM D6180-05, Standard Test Method for Stability of Insulating Oils of Petroleum Origin Under Electrical Discharge (Withdrawn 2014), ASTM International, West Conshohocken, PA, 2005, www.astm.orgBack to Top