NB/T 42003-2013 in English

This document specifies the methods for testing the insulation of iron cores (laminations) in high-voltage motors. It covers various aspects including test conditions, procedures, and requirements for evaluating the insulation performance. The standard provides detailed guidance on the preparation of test samples, the application of test voltages, and the measurement of insulation resistance and dielectric strength. It is applicable to the production, quality control, and acceptance testing of high-voltage motor iron cores. The content is structured to ensure consistency and reliability in the testing process, facilitating the evaluation of insulation properties under different operating conditions. This standard supports the development and application of reliable insulation technologies in high-voltage motor manufacturing.