摘要
针对氧化锌压敏电阻在8/20μs电流波冲击下的老化、劣化问题,采用8/20μs对压敏电阻多个参数进行冲击试验,进行氧化锌压敏电阻劣化的理论分析。分析得出,当压敏电压值大于其初始值±8.6%、漏电流的值大于17.2μA时,非线性系数,的值减小到12-11或变化率达到68%左右。残压比K的变化率超过8.5%时,可以认为该试验样品已经劣化。该研究结果在生产氧化锌压敏片或测试其性能以及日常使用MOV型SPD时都具有一定的参考价值。
Aiming at the aging deterioration problem of zinc oxide varistor under the impact of 8/20 μs current wave, the theoretical analysis of the variation of zinc oxide varistor was carried out, using 8/20 μs impact test on varistor. The value of the nonlinear coefficient decreases to 12 to 11 or the change rate reaches 68% when the value of the leakage current is greater than 17. 2μA and the value of the varistor voltage is greater than its initial value of ±8.6%. When the rate of change of the residual pressure ratio exceeds 8.5%, it can be considered that the test sample has deteriorated. The results of the study have a certain reference value in the production of zinc oxide varistor or testing its performance and daily use of MOV SPD.
作者
宋占党
SONG Zhandang(State Grid Urumqi Electric Power Supply Company,Urumqi 830000,China)
出处
《电器与能效管理技术》
2019年第9期12-16,35,共6页
Electrical & Energy Management Technology
关键词
氧化锌压敏电阻
劣化
非线性系数
残压比
zinc oxide varistor
deterioration
nonlinear coefficient
residual voltage ratio
