Djelomično pražnjenje ima erozivni učinak na izolacijsku strukturu, a njegov mehanizam oštećenja izolacije ima sljedeće aspekte:
①Charged particles (electrons, ions, etc.) impact the insulation, destroying its molecular structure, such as fiber fragmentation, so the insulation is damaged.
②Due to the impact of charged ions, the local temperature of the insulation will rise, which will easily cause overheating of the insulation, and carbonization will occur in severe cases.
③Ozone and nitrogen oxides generated by partial discharge will erode the insulation, and when there is moisture, nitric acid will be produced, which will erode the insulation more severely.
④During partial discharge, the oil is decomposed due to electrolysis and the Schottky radiation effect of the electrode, and there are some impurities in the oil, so it is easy to condense the sludge generated by polymerization at the paper layer (mostly in the insulation or other insulating oil wedges), the formation of sludge will increase the dielectric damage angle of the insulation, reduce the heat dissipation capacity, and even lead to the possibility of thermal breakdown. The continuous development of partial discharge will gradually expand the deterioration and damage of the insulation, which will eventually shorten the normal life of the insulation, reduce the short-term dielectric strength, and may even cause the entire insulation to break down.
Osnovni uzrok djelomičnog pražnjenja kabela je nekvalificirana kvaliteta kabela. Takvi kabeli iznimno lako mogu izazvati nezgode kada se koriste dulje vrijeme. Kako bi se izbjegli takvi incidenti, najosnovniji način je odabrati kabele nacionalnog standarda s nacionalnim certifikatom i osiguranjem kvalitete: kako bi se izbjeglo djelomično pražnjenje u kabelu. Pearl River Cable aktivno je uveo naprednu tehnologiju proizvodnje žice i kabela, proizvodnu opremu i opremu za testiranje u zemlji i inozemstvu. Uvijek je inzistirao na odabiru visoko{0}}kvalitetne sirovine u zemlji i inozemstvu te je implementirao strogi sustav kontrole kvalitete kako bi osigurao kvalitetu proizvoda tvrtke iz izvora. , svaka žica i kabel su u skladu s nacionalnim standardima i standardima Međunarodne elektrotehničke komisije.
