1.1 本试验方法测定了矿物变压器油在规定的加速老化条件下的抗氧化性。氧化稳定性是通过油在氧化过程中形成污泥和酸性产物的倾向来衡量的。本试验方法适用于未抑制和抑制的新油，但未明确定义用于旧油或再生油。 注1: 试验方法中提供了用于评估抑制油的较短时间氧化试验 D2112 . 注2: 对于那些对挥发性酸度测量感兴趣的人，请参考IEC方法61125。 2. 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 矿物变压器油的氧化稳定性试验是一种在规定条件下测试变压器油时，评估变压器油中形成的污泥和酸性产物数量的方法。良好的氧化稳定性是必要的，以最大限度地减少油泥和酸的形成，从而延长油的使用寿命。符合规范中本试验规定要求的油 D3487 倾向于最小化导电性，确保可接受的热传递，并保持系统寿命。由于该测试没有模拟整个绝缘系统（油、纸、搪瓷、电线），因此该测试中的性能与使用中的性能之间没有已证明的相关性。 然而，该试验可作为评估抗氧化剂和检查生产油氧化稳定性一致性的对照试验。

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 1: A shorter duration oxidation test for evaluation of inhibited oils is available in Test Method D2112 . Note 2: For those interested in the measurement of volatile acidity, reference is made to IEC Method 61125. 2 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 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 D3487 tend to minimize electrical conduction, ensure acceptable heat transfer, and preserve system life. There is no proven correlation between performance in this test and performance in service, since the test does not model the whole insulation system (oil, paper, enamel, wire). However, the test can be used as a control test for evaluating oxidation inhibitors and to check the consistency of oxidation stability of production oils.