EN 61557-1-2007 交流1000V和直流1500V以下低压配电系统的电气安全.防护措施的试验,测量和监控设备.第1部分:一般要求
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 1: General requirements