Microscopic and acoustic testing of medium-voltage composite insulator carrying rods

摘要

In this paper, acoustic emission, ultrasonic and microscopic methods of testing were applied to investigate the structure of composite rods, used as part of medium-voltage electrical insulators. The composite structure, its homogeneity level and the occurrence of defects were discussed. The investigation was performed to determine the influence of the composite structure on the quality of the final product. The results of acoustic tests are in good agreement with the results of microscopic investigation.