The electromagnetic unit of capacitor voltage transformer is checked by the infrared temperature measurement after its abnormal heat and found such circumstance as water penetration and rust in the intermediate transformer

dielectric resistance reduction of secondary terminal. It is found through site situation

simulation analysis and test etc

that the weak sealing is due to bad installation quality of the sealing strip and uneven force of the sealing cover. As for the reason of the defects

such effective measures as eliminating hidden danger of similar equipment

improving the sealing structure of equipment

strengthening operation monitoring and equipment acceptance are formulated

which assures effectively safe and stable operation of equipment.