INVESTIGATION OF MICROSTRUCTURE OF ZnO VARISTORS TAKEN FROM SURGE ARRESTER COUNTERS

被引:2
|
作者
Paplinski, P. [1 ]
Wankowicz, J. [1 ]
Ranachowski, P. [2 ]
Ranachowski, Z. [2 ]
机构
[1] Res Inst, Inst Power Engn, 8 Mory Str, PL-01330 Warsaw 8, Poland
[2] Inst Fundamental Technol Res PAS, 5B Pawinskiego Str, PL-02106 Warsaw, Poland
关键词
surge arrester counter; ZnO varistors; microstructure of ceramics; ceramic material degradation;
D O I
10.24425/amm.2019.126237
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The paper presents investigations of microstructure of varistors of damaged surge arrester counters. A similar ZnO varistor, not subjected before to operation, was a point of reference in this research. The results of investigations of the ZnO varistors show an untypical phase composition of their material, which was characterized by unsatisfying homogeneity and cohesion. The degradation processes of varistor material in the subsequent stages were recognized and described. A harmful impact of humidity inside the untight surge arrester counter on its operation and its ZnO varistors was proved. Some conclusions being the result of the operation checking of surge arrester counters were presented too.
引用
收藏
页码:191 / 196
页数:6
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