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.
WITHDRAWN
IEC 61557-8:1997 ED1
99.60
Withdrawal effective
Jan 29, 2007
WITHDRAWN
IEC 61557-8:2007 ED2