电气绝缘材料 耐热性能 第4-2部分:热老化烘箱 最高至300℃的精密烘炉

[中文适用范围]： IEC 60216 的这一部分涵盖了用于电绝缘材料耐热性评估和其他适当应用的通风和电加热精密烤箱的最低性能要求。它涵盖了设计用于在高于室温 20 K 至 300 ℃ 的全部或部分温度范围内运行的烤箱。描述了实现所需性能的两种可能方法：a) 通过在简单的单室烘箱（即符合 IEC 60216-4-1 的升级版烘箱）中精确控制温度来实现所需性能，否则，b ）其中通过使用安装在单室烤箱的室内的第二个室（iso-box）来实现所需的性能，其目的是将任何温度变化的幅度降低到可接受的水平，同时保持所需的换气和循环的程度。注 1：经验表明，使用 iso-box 是满足精密烘箱要求的一种经济实用的方法。注2：当预期减半间隔小于10 K（20 kh至10 kh）时，建议使用精密烘箱而不是标准烘箱，以将测量的温度指数和减半间隔的精度提高到合理的范围。等级。 [外文原描述]： Covers minimum performance requirements for ventilated and electrically heated precision ovens for thermal endurance evaluation of electrical insulating materials and other appropriate applications. It covers ovens designed to operate over all or part of the temperature range from 20 K above room temperature up to 300°C. Two possible methods of achieving the required performance are described: a) where the required performance is achieved by precise control of temperature in a simple single chamber oven, i.e., upgraded versions of ovens conforming to IEC 60216-4-1, and, otherwise b)where the required performance is achieved by utilizing a second chamber (iso-box), mounted within the chamber of a single-chamber oven, the purpose of which is to reduce the magnitude of any temperature changes to an acceptable level whilst maintaining the required levels of air changes and circulation.