Abstract: The 110kV line type capacitive voltage transformer overheats after it is put into operation. Based on the structure and working principle of CVT, the broken CVT is disassembled and inspected. It is found that the internal damper causes the fault. All hidden troubles of the equipment cannot be found during the operation and debugging. One effective method to determine operation condition of the equipment is to perform infrared temperature detection after operation, which provides constructive suggestions for on-site commissioning test and daily safe and reliable operation.
Key words: Capacitive voltage transformer (CVT), fault, test, infrared test
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