1.1 这些测试方法涵盖了用作变压器、电容器和电子组件的绝缘或冷却介质或两者的硅液体的测试。这些方法通常适用于规范验收（规范 D4652 )、工厂控制、仲裁测试和研究。 1.2 虽然此处列出的一些测试方法主要适用于石油基液体，但经过轻微修改后，它们同样适用于硅液体。 1.3 硅液体用于电绝缘目的，因为其在高温和低温下性能稳定，且相对环境惰性。 1.4 特性和标准列表如下: 测量的特性 部分 ASTM试验方法 物理: 颜色 6. D2129 闪点 7. D92 火灾点 7. D92 多氯联苯 所容纳之物 8. D4059号 倾点 9 D97 折射率 10 D1807 比重 11 D1298号 , D1481 , D4052号 波动 12 D4559 粘度 13 D445 化学品: 酸值 14 D974 含水量 15 D1533 电气: 相对介电常数 16 D924 2. 电介质击穿 电压 17 D877 3. 电介质击穿 电压 17 D1816 耗散因子 18 D924 2. 比电阻 19 D1169 2. 兼容性 20 D5282 1.5 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。 1.6 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 本标准中涵盖的测试可用于质量控制和设计考虑。 4.2 每个测试方法中都包含一个简短的声明，描述其重要性。

1.1 These test methods cover the testing of silicone liquids for use in transformers, capacitors, and electronic assemblies as an insulating or cooling medium, or both. These methods are generally suitable for specification acceptance (Specification D4652 ), factory control, referee testing, and research. 1.2 Although some of the test methods listed here apply primarily to petroleum-based fluids, they are, with minor revisions, equally applicable to silicone liquids. 1.3 Silicone liquids are used for electrical insulating purposes because of their stable properties at high and low temperatures and their relative environmental inertness. 1.4 A list of the properties and standards are as follows: Property Measured Section ASTM Test Method Physical: Color 6 D2129 Flash point 7 D92 Fire point 7 D92 Polychlorinated biphenyl content 8 D4059 Pour point 9 D97 Refractive index 10 D1807 Specific gravity 11 D1298 , D1481 , D4052 Volatility 12 D4559 Viscosity 13 D445 Chemical: Acid number 14 D974 Water content 15 D1533 Electrical: Relative permittivity 16 D924 2 Dielectric breakdown voltage 17 D877 3 Dielectric breakdown voltage 17 D1816 Dissipation factor 18 D924 2 Specific resistance 19 D1169 2 Compatibility 20 D5282 1.5 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. 1.6 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 Tests covered in this standard may be used for quality control and design considerations. 4.2 Included in each test method is a brief statement describing its significance.