Search:
Categories:
Links:
A Continued Source of Flashover and Outages
Finding the insulators that are failing in the field is very difficult. The area of tracking is almost invisible from the ground or even during bucket-truck inspections. Infrared inspections do not locate these devices because little current, therefore no discernible heat signature, is generated across the insulator surface. Using EXACTER, the insulators are easily located at the onset of tracking. click thumbnail to view larger image
The aluminum-porcelain insulator design has not been holding up to Midwest winters. Apparently, the interface between the two materials is affected by freeze/thaw cycles. It is suggested that the coefficients of expansion for the two materials results in cracking of the porcelain surface. This cracking leads to tracking and an eventual flashover and circuit outage.
©2007 Exacter, Inc.
Powered By Wordpress