IEC 61557-8:2007
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

Standard No.

IEC 61557-8:2007

Release Date

2007

Published By

International Electrotechnical Commission (IEC)

Status

Withdraw

Replace By

IEC 61557-8:2007/COR1:2007

Latest

IEC 61557-8:2014/COR1:2016

Scope

This part of IEC61557 specifies the requirements for insulation monitoring devices (IMD) which permanently monitor the insulation resistance to earth of unearthed IT a.c. systems, for IT a.c. systems with galvanically connected d.c. circuits having nominal voltages up to 1000V a.c., as well as of unearthed IT d.c. systems with voltages up to 1 500V d.c. independent from the method of measuring. NOTE 1"IT systems are described in IEC 60364-4-41 amongst other literature. Additional data for a selection of devices in other standards should be noted. NOTE 2"Various standards specify the use of insulation monitoring devices in IT systems. In such cases, the objective of the equipment is to signal a drop in insulation resistance below a minimum limit. NOTE 3--Insulation monitoring devices according to this part of IEC61557 may also be used for de-energized electrical systems.

IEC 61557-8:2007 history

• 2016 IEC 61557-8:2014/COR1:2016 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 8: Insulation monitoring devices for IT systems (Edition 3.0)
• 2014 IEC 61557-8:2014 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 - Proposed Horizontal Standard
• 2007 IEC 61557-8:2007/COR1:2007 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; Corrigendum 1
• 2007 IEC 61557-8:2007 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
• 1997 IEC 61557-8:1997 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