串联间隙避雷器的终身监测装置

Tongchun Luo, Shuai Yang, Xiaolu Li, Wenjun Zhou, Jianhui Yu, L. Qiu
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引用次数: 1

摘要

通过实验,观察了ZnO压敏电阻在脉冲电流作用下的老化情况,并测量了反映老化程度的参数(即U1mA变化率和功率损耗)。分析了不同电流峰值、波形、压敏电阻温度下的脉冲电流次数与ZnO压敏电阻寿命的关系。由此得出了一个反映大电流通过避雷器次数与寿命关系的规律。电流的次数大于避雷器的标称放电电流,可作为避雷器寿命结束的判据。最后,根据这一结论,设计、制作了串联间隙避雷器的在线寿命监测装置并进行了试验。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Life-Time Monitoring Device of Surge Arrester with Series Gap
By means of experiments, the aging situation of ZnO varistor under the effect of impulse-current was observed, also, parameters (i.e. the change rate of U1mA and power loss) which reflect aging degree was measured. The relationship between the times of impulse current -which is under varies current peaks, waveforms, varistor temperatures- and ZnO varistor's life-time is also analyzed. Therefore, a discipline is concluded, which reflects the relationship between the times of large current going through arrester and its life-time. And the times of current with a certain value which is larger than arrester's nominal discharge current, can be regarded as a criterion as the ending of arrester's life-time. In the end, according to this conclusion, an on-line life-time monitoring device of surge arresters with series gap was designed, made and tested.
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