OVE EN 61557-9/AC:2017-06
Действует
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 9: Equipment for insulation fault location in IT systems (IEC 61557-9:2014/COR2:2017) (Corrigendum) (english version)
