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The overall performance of the insulation system will be degraded by surface charge accumulation on insulating materials in Gas Insulated Switchgear (GIS) and other electrical apparatuses. Polyimide (PI) plays an important role in the field of electrical insulation. It is therefore important to have appropriate knowledge on the surface charge decay mechanism of PI polymer. This paper investigated...
Surface charge on insulator polymers in breakers, gas insulated switchgears and other electrical apparatuses, plays a dominant role in the insulation performance of power system. Meanwhile, the surface potential on the functional dielectric can be one of the criteria in the evaluation of the charge storage performance when the dipoles formed in polymer are taken into consideration during corona poling...
Atmospheric pressure dielectric barrier discharge(DBD) plasma surface treatment is a useful means to modify the properties of polytetrafluoroethylene(PTFE) films, such as hydrophily, adhensive ability. A generator with more dielectric layers will affect the plasma characteristics, and then affects the treatment effects on PTFE films. To investigate this influence, some experiments were carried out...
Epoxy resin has become an integral part of electronic and electrical devices where the material is exposed to pulse stress. Surface charge accumulation and decay of charged dielectric materials are very important parameters related to the electrical properties of the material. Nano-composite technology makes it possible to improve electrical properties of insulating materials. Therefore, it is important...
Epoxy resin has become an integral part of electronic and electrical devices for their excellent mechanical and electrical performance. Nano-composite technology makes it possible to improve electrical properties of insulating materials. For the use of nanocomposites of epoxy resin, it must be confirmed whether the electrical performance with nanoparticles is different from that without nanoparticles...
This paper investigates the effect of nano-scale Al2O3 on the tracking failure resistance of silicone rubber nanocomposites. The samples were prepared by filling nano-scale Al2O3 in silicone rubber with the weight ratios of 0.25, 0.5, 1, 1.5, 3 wt%. AC voltage (0 kV-50 kV) was applied on a pair of needle-plate electrodes on the nanocomposites surface with insulation distance of 10 mm. The weight loss,...
This paper investigates the effect of nano-scale SiO2 on the tracking failure properties of nanocomposites. Test samples were made by dispersing nano-scale SiO2 powder in epoxy with the weight ratios of 0, 1, 3, 5, 7, 9 wt%. AC voltage was applied on a pair of needle-plate electrodes at the surface with the insulation distance of 10 mm. The time to tracking failure and discharge current were recorded...
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