Guide for the determination of thermal endurance properties of electrical insulating materials; part 2: choice of test criteria

This document serves as a guiding framework specifically designed for the evaluation of thermal endurance in electrical insulating materials. Focusing on the second part of the series, it provides structured methodologies for selecting appropriate test criteria and acceptance limits. The content addresses the technical procedures necessary to assess how insulation withstands high-temperature stress over extended periods. It outlines the principles for interpreting experimental data to determine the suitability of materials for specific operational environments. The text details the relationship between temperature, time, and the resulting degradation of dielectric properties. It assists engineers and manufacturers in establishing reliable benchmarks for product safety and longevity without prescribing specific material compositions. By offering a systematic approach to data analysis, this standard facilitates consistent comparisons across different testing scenarios. The guidelines ensure that the selection of judgment standards aligns with international technical expectations for performance verification. It remains a foundational reference for understanding the thermal aging behavior of non-metallic components used within electrical systems. The approach described supports quality assurance processes by defining clear parameters for success and failure in thermal endurance testing.