Failure Analysis on Strain Clamp on 220kV Transmission Line

• DOI: 10.4028/www.scientific.net/amr.652-654.1405
• Publication Date: 2013-03-11T17:07:12Z
• Authors: Xue Xia Xu; Yan Ting Feng; Hao Ke; Xiao Guang Niu; Jie Ouyang
• Keywords: 0502 economics and business; 05 social sciences

Failure analysis on a strain clamp cracking on 220kV transmission line was carried out based on results of macro-observation, mechanical property examination and EDAX analysis. It is concluded that the main reason of the clamp failure lies in incomplete surface cleaning during wire crimping that cause large current flowing through steel cores, heating them and reduced their strength. In addition, oxidation due to residue water for insufficient baking also contributes to the failure. Finally suggestions were put forward.