标准号:IEC 61557-3-2007 已废止
英文名称:Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 3: Loop impedance
标准组织
CCS分类
ICS分类
发布日期
实施日期
废止日期