SUN Fan, WANG Weiqing, JIN Ming, et al. Inner Insulation Defect Characteristic and Detection Method of Oil-immersed-inverted Type Current Transformer[J]. Power capacitor & reactive power compensation, 2025, 46(2): 120-126.
SUN Fan, WANG Weiqing, JIN Ming, et al. Inner Insulation Defect Characteristic and Detection Method of Oil-immersed-inverted Type Current Transformer[J]. Power capacitor & reactive power compensation, 2025, 46(2): 120-126. DOI: 10.14044/j.1674-1757.pcrpc.2025.02.014.
The oil-immersed-inverted type current transformer is a typical minimum oil equipment. Under the long term operation in the environment of high electric field intensity
its insulation process control is difficult
leading to frequent explosions and oil injection faults due to insulation. In this paper
the fault analysis of the oil-immersed-inverted type current transformer is taken as the starting point to analyze the causes of insulation defects. The gas chromatography analysis
partial discharge detection
high voltage dielectric loss test and long-term rated voltage infrared temperature measurement test are performed on the defective equipment. Finally
the defect characteristics of the test results are analyzed and a reasonable defect detection method is proposed for the equipment in operation.