As for the local overheating issue of AC filter capacitor

in this paper the typical fault features of AC filter tripping due to overheating of the capacitor is summarized.The mechanism and causes of the local overheating of capacitor is foundout through the disassembly and analysis of the faulty capacitor.The misunderstanding of infrared diagonsis technology in definding overheating defects of the capacitor proper is pointed out

the specific operation and maintenance strategy suggestion on the improvement of the capacitor and fault rate reduction of the AC filter are proposed

which provides valuable reference for the sealing and installation process of the bush joint of capacitor.