This paper describes internal quality problems of the oil-immersed current transformer and puts forward strategies guarding against operating errors of the oil-immersed current transformer.
简述油浸式电流互感器内部质量问题，提出了防止油浸式电流互感器运行事故的对策。
Based on this, the paper presents a new transformer protection criterion to distinguish internal faults and external faults by correlation coefficients of sampled current values.
在此基础上，提出一种基于电流采样值相关度的变压器保护新判据，利用变压器两侧电流采样值波形的相关度来区分内部故障和外部故障。
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