介绍了复合外套金属氧化物避雷器起痕和电蚀试验方法，针对试验中出现的主要问题作了简要分析；
This article introduces the test for tracking and erosion of polymeric housed metal oxide arresters is described Some phenomena in the test have been analysed.
分析认为，与相对成熟的交流金属氧化物避雷器相比，直流金属氧化物避雷器的研究和试验较复杂。
Based on analysis it is considered that the development and test of HVDC MOA are very complex in contrast with relatively maturation HVAC MOA.
带串联间隙金属氧化物避雷器动作负载试验频繁失败的原因和如何正确选取电阻片整体参数一直是制造厂和用户关注的问题。
The causes of frequent failures in duty cycle test of gapped MOA and correct selection of parameters of resistor columns are always topics of concern of manufacturers and users.
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