Infrared Imaging Of Insulators

dead end insulators Infrared imaging can detect the local temperature rise of the insulator caused by local discharge, dielectric loss or resistance loss when leakage current flows through insulating materials, and can be used for line detection. A power company conducted an infrared thermal imaging temperature measurement survey on a large number of running composite dead end suspension insulators. The results showed that: for all polymer deadend insulator with obvious local hot spots, the silicone rubber surface from the hot spot to the high-voltage end of porcelain dead end insulators was significantly blackened, powdered, brittle, and basically lost its hydrophobicity. Some suspension insulator had many small cracks or even serious damage; the hot spot to the high-voltage end could not withstand the power frequency withstand voltage test or steep wave impact test, which shows that the hot spot is the location where the local discharge of the internal insulation surface progresses. The high cost of the instrument and the fact that the measurement is easily affected by sunlight, strong wind, moisture, ambient temperature and some factors that can cause the surface temperature of suspension composite insulator to change sharply are the shortcomings of the infrared imaging method. It also affects its application.