Research On Rapid Diagnosis Technology After The Oil-Paper Bushing Insulation Damp

Oil-paper bushing insulation damp at condition in motion, but the moisture content in the diagnosis of bushing damping insulation had no effect at the test site. In this paper, the high voltage and large current and heat energy acting on bushing test platform is established. The dielectric loss frequency characteristics and dielectric loss temperature characteristics are studied on the cooling transient process of bushing body. Research results show that, the bushing is insulated with damp or failure, when cross turning point is greater than 80Hz or 100Hz of the dielectric loss frequency characteristic spectrum within the casing body temperature is decreased from 80 to 40.