ASTM-D2440 › Historical Revision Information
Standard Test Method for Oxidation Stability of Mineral Insulating Oil
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Scope
1.1 This test method determines the resistance of mineral transformer oils to oxidation under prescribed accelerated aging conditions. Oxidation stability is measured by the propensity of oils to form sludge and acid products during oxidation. This test method is applicable to new oils, both uninhibited and inhibited, but is not well defined for used or reclaimed oils.
Note 1A shorter duration oxidation test for evaluation of inhibited oils is available in Test Method D 2112.
Note 2For those interested in the measurement of volatile acidity, reference is made to the work of IEC Subcommittee 10A.
1.2 The values stated in metric units are to be regarded as the standard.
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.
Significance and Use
The oxidation stability test of mineral transformer oils is a method for assessing the amount of sludge and acid products formed in a transformer oil when the oil is tested under prescribed conditions. Good oxidation stability is necessary in order to maximize the service life of the oil by minimizing the formation of sludge and acid. Oils that meet the requirements specified for this test in Specification D 3487
Keywords
acid; aging; insulating mineral oil; oxidation; sludge; stability; transformer; 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)
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Document Number
ASTM-D2440-99(2004)
Revision Level
1999 R04 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
Oct. 1, 2004
Document Type
Test Method
Page Count
6 pages
Committee Number
D27.06