The energy absorption capability and time-to-failure of varistors used in station-class metal-oxide surge arresters

被引：45
|
作者：
Ringler, KG
Kirkby, P
Erven, CC
Lat, MV
Malkiewicz, TA
机构：
[1] Ontario Hydro Technologies, Toronto
来源：
IEEE TRANSACTIONS ON POWER DELIVERY | 1997年 / 12卷 / 01期
关键词：
metal-oxide surge arresters; varistors; energy absorption capability; current pulses; current density; current duration; testing; confidence limits; failure probability; failure modes; time-to-failure; standards;
D O I：
10.1109/61.568242
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Varistors for use in station-class surge arresters were tested to destruction to determine their energy absorption capability at current levels ranging from 0.8 A(peak) to 35 kA(peak). Typical mean values increased from 400-600 J/cm(3) at the lower current end to 1,600-2,000 J/cm(3) at 35 kA(peak). The product of the mean time-to-failure and the mean current was found to be a constant over five orders of magnitude. The varistor failure mode was found to be a characteristic of the current magnitude. It is recommended that standard test methods be developed for the energy absorption capability of metal-oxide surge arresters, and be included in relevant standards.
引用
收藏
页码：203 / 212
页数：10
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