Regarding the test results of the metal-oxide surge arresters without gaps for 27.5 kV a.c.Systems com-missioned for electrified railway supply in recent years,the test items whose test results were unqualified are counted.The paper analyzes the reasons for the unqualified test items such as sealing test,bending load test,2 ms square wave current impulse withstand test,and 4/10 high current impulse withstand test of the resistor,and proposes measures to improve the quality of 27.5 kV surge arresters.
Electrified Railway SupplyMetal-oxide Surge Arresters Without Gaps for a.c.SystemsTest ResultUn-qualified Test ItemCause Analysis
NETL
NSTL
万方数据
