These requirements cover test procedures used in the evaluation of Class 120(E) or higher rated electrical insulation systems (EIS) with operating voltages of 1 kV and above for use in; open wound@ cast coil@ resin encapsulated and pre-preg flexible sheet rolled@ dry-type high-voltage transformers where the thermal factor is the dominating aging factor and where transient over-voltages or partial discharge may be present. This outline is intended to evaluate a single EIS and establish a Voltage Stress Level (VSL) for the various insulation functions tested such as turn-to-turn@ layer-to-layer@ section-to-section@ coil-to-coil and coil-to-ground. An EIS established under this outline is suitable for all transformers constructed with this EIS such that the design maintains the insulation thickness at or below the tested VSL values. These requirements for the evaluation of an EIS do not establish thermal ratings for/or alter established thermal ratings for individual components. These requirements do not cover insulation systems exposed to radiation or operating in oils@ refrigerants@ soaps@ or other media that potentially degrade insulating materials. When any performance aspect of an end-product requirement is not covered by this outline@ the applicable standard shall be used.
SUBJECT 1446A-2018由UL - UL 发布于 2018-01-30,并于 2018-02-03 实施。
非常抱歉,我们暂时无法提供预览,您可以试试: 免费下载 SUBJECT 1446A-2018 前三页,或者稍后再访问。
点击下载后,生成下载文件时间比较长,请耐心等待......
Copyright ©2007-2022 ANTPEDIA, All Rights Reserved
京ICP备07018254号 京公网安备1101085018 电信与信息服务业务经营许可证:京ICP证110310号