IEC 60099-9:2014适用于无火花隙的非线性金属氧化物电阻式电涌放电器，其设计用于限制双端、多端和背靠背高压直流换流站中的过电压，最高工作电压为1100 kV。本标准一般适用于瓷套和聚合物套避雷器，但也适用于仅用作直流母线和直流线路/电缆避雷器的气体绝缘金属封闭避雷器（GIS避雷器）。不包括电压源变流器的避雷器。按照IEC 60099-4的要求，对应用于换流站交流系统的避雷器进行测试，避雷器的工频电压为50或60 Hz，主要是无谐波。交流滤波器上的避雷器根据本标准进行测试。 关键词:无间隙金属测试- 高压直流换流站用氧化物避雷器

IEC 60099-9:2014 applies to non-linear metal-oxide resistor type surge arresters without spark gaps designed to limit overvoltages in HVDC converter stations of two terminal, multiterminal and back-to-back type up to and including an operating voltage of 1 100 kV. The standard applies in general to porcelain-housed and polymer-housed type arresters but also to gas-insulated metal enclosed arresters (GIS-arresters) solely used as d.c. bus and d.c. line/cable arresters. Arresters for voltage source converters are not covered. Arresters applied on the a.c. systems at the converter station and subjected to power-frequency voltage of 50 or 60 Hz principally without harmonics are tested as per IEC 60099-4. The arresters on a.c.-filters are tested according to this standard. Keywords: testing of gapless metal-oxide surge arrestors for HVDC converter stations