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534.1 总则本标准规定了采用抑制电压措施应用,以达到在 IEC 60364-4-44,IEC60664-1,IEC61312-2和IEC61643-12中规定的绝缘配合要求。本标准给出了选择和安装电涌保护器(SPD)的要求: ——在建筑物电气装置中使用电涌保护器(SPD)限制从电源配电系统传来的大气瞬态过电压和操作过电压; ——在已具备雷击保护系统的情况下使用
534.1 General This standard specifies the use of voltage suppression measures in order to achieve the IEC 60364-4-44, IEC60664-1, IEC61312-2 and IEC61643-12 specified in the insulation requirements. This International Standard specifies the requirements for the selection and installation of surge protectors (SPDs): - The use of surge protectors (SPDs) in building electrical installations to limit the atmospheric transient overvoltages and operation of power distribution systems Overvoltage; - Use with lightning protection system already in place