IEC 61557-8:1997 ed1.0

Заменен

Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices for IT systems — 21 стр.

Описание Изменения Ссылки Версии

Specifies requirements for insulation monitoring devices which permanently monitor the insulation resistance to earth of unearthed IT a.c. and d.c. systems, and for IT a.c. systems with galvanically connected d.c. circuits.

Заменен на

IEC 61557-8:2007 ed2.0

ICS

29.240.01 Power transmission and distribution networks in general / Сети электропередач и распределительные сети в целом

17.220.20 Measurement. Including measuring instruments, instrument transformers / Измерения электрических и магнитных величин. Включая измерительные приборы, измерительные трансформаторы

29.080.01 Electrical insulation in general / Электрическая изоляция в целом