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现行 ASTM D1830-17(2024)
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Standard Test Method for Thermal Endurance of Flexible Sheet Materials Used for Electrical Insulation by the Curved Electrode Method 用弯曲电极法测定电绝缘用柔性薄板材料耐热性的标准试验方法
发布日期: 2024-03-01
1.1 该试验方法提供了一种评估柔性片材耐热性的程序,通过在选定的高温下在空气中老化后测定室温下的介电击穿电压。耐热性用温度指数来表示。 1.2 本试验方法适用于涂层织物、介电膜、复合材料层压板等固体电绝缘材料,以及热老化后保持柔韧性至关重要的其他材料(见 注4 ). 1.3 本试验方法不用于评估刚性层压板材料,也不用于确定那些在实际使用中不期望或不需要保持灵活性的材料的耐热性。 1.4 以可接受的公制单位表示的数值应视为标准。括号中的值仅供参考。 1.5 本标准并不旨在解决与其使用相关的所有安全问题(如有)。 本标准的使用者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。 有关具体的危险说明,请参阅 10.1 . 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 影响绝缘材料寿命的一个主要因素是热降解。其他因素,如湿度和振动,可能会在材料因热降解而减弱后导致失效。 5.2 电气绝缘只有在保持其物理和电气完整性的情况下才对电气设备有效。 热降解的特征是重量变化、孔隙率、龟裂,通常是柔性的降低,并且通常伴随着介电击穿电压的最终降低。
1.1 This test method provides a procedure for evaluating thermal endurance of flexible sheet materials by determining dielectric breakdown voltage at room temperature after aging in air at selected elevated temperatures. Thermal endurance is expressed in terms of a temperature index. 1.2 This test method is applicable to such solid electrical insulating materials as coated fabrics, dielectric films, composite laminates, and other materials where retention of flexibility after heat aging is of major importance (see Note 4 ). 1.3 This test method is not intended for the evaluation of rigid laminate materials nor for the determination of thermal endurance of those materials which are not expected or required to retain flexibility in actual service. 1.4 The values stated in acceptable metric units are to be regarded as the standard. The values in parentheses are for information only. 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. For a specific hazard statement, see 10.1 . 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 ====== 5.1 A major factor affecting the life of insulating materials is thermal degradation. Other factors, such as moisture and vibration, are able to cause failures after the material has been weakened by thermal degradation. 5.2 Electrical insulation is effective in electrical equipment only as long as it retains its physical and electrical integrity. Thermal degradation is able to be characterized by weight change, porosity, crazing, and generally a reduction in flexibility, and is usually accompanied by an ultimate reduction in dielectric breakdown voltage.
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归口单位: D09.01
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