Research On The Degradation Of Pre-insulated Bushing Performance

Combined with the FTIR analysis results, it is believed that the fading (whitening) of the pre insulated sleeve surface and the white powder precipitation during corona discharge are mainly caused by nitric acid.
Kumosa et al. in the United States conducted experimental analysis and showed that the nitric acid produced during air corona discharge can not only corrode the aged pre insulated junction sleeve surface, causing the performance of insulated joint sleeve to deteriorate,