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IEC 61557-8

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

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Organization: IEC
Publication Date: 1 January 2007
Status: inactive
Page Count: 44
ICS Code (Power transmission and distribution networks in general): 29.240.01
ICS Code (Measurement of electrical and magnetic quantities): 17.220.20
ICS Code (Electrical insulation in general): 29.080.01
scope:

This part of IEC 61557 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 1 000 V a.c., as well as of unearthed IT d.c. systems with voltages up to 1 500 V 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 IEC 61557 may also be used for de-energized electrical systems.

Document History

IEC 61557-8
May 1, 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
A description is not available for this item.
IEC 61557-8
December 1, 2014
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
This part of IEC 61557 specifies the requirements for insulation monitoring devices (IMD) which permanently monitor the insulation resistance RF to earth of unearthed a.c. IT systems, of a.c. IT...
IEC 61557-8
May 1, 2007
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
A description is not available for this item.
IEC 61557-8
January 1, 2007
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
This part of IEC 61557 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....
IEC 61557-8
February 1, 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
A description is not available for this item.

References

This document references:
60364-7-710 - Low-voltage electrical installations – Part 7-710: Requirements for special installations or locations – Medical locations
Published by IEC on May 1, 2021
The particular requirements of this part of IEC 60364 apply to electrical installations in medical locations so as to provide safety of patients and medical staff. These requirements refer to: –...
This document references:
IEC 60721-3-2 - Classification of environmental conditions – Part 3-2: Classification of groups of environmental parameters and their severities – Transportation and handling
Published by IEC on November 1, 2018
A description is not available for this item.
This document references:
IEC 60721-3-1 - Classification of environmental conditions – Part 3-1: Classification of groups of environmental parameters and their severities – Storage
Published by IEC on February 1, 2018
This part of IEC 60721 classifies the groups of environmental parameters and their severities to which products together with their packaging, if any, are subjected when stored. The environmental...
This document references:
IEC 60947-5-1 - Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices and switching elements – Electromechanical control circuit devices
Published by IEC on May 1, 2016
Scope and object This part of IEC 60947 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear. It applies...
This document references:
IEC 61326-2-4 - Electrical equipment for measurement, control and laboratory use – EMC requirements – Part 2-4: Particular requirements – Test configurations, operational conditions and performance criteria for insulation monitoring devices according to IEC 61557-8 and for equipment for insulation fault location according to IEC 61557-9
Published by IEC on October 1, 2020
In addition to IEC 61326-1, this part of IEC 61326 specifies more detailed test configurations, operational conditions and performance criteria than IEC 61326-1 for equipment for – insulation...
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