Table 4 summarizes the highest magnitude of leakage current registered by the monitoring systems. No leakage current
levels above the critical ones, as determined in the laboratory
(Table 2), were recorded for the operating conditions of this site.
Therefore, no pollution flashover should have taken place. To
understand the reason for flashovers, several of the flashed insulators were removed from the site for laboratory flashover tests
and chemical analysis of the pollutant.