BS EN 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 - Insulation monitoring devices for IT systems

Standard No.

BS EN 61557-8:2007

Release Date

2007

Published By

British Standards Institution (BSI)

Status

Be replaced 2015-02

Replace By

BS EN 61557-8:2015

Latest

BS EN 61557-8:2015(2016)

Replace

04/30125208 DC-2004 BS EN 61557-8:1997

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.

BS EN 61557-8:2007 Referenced Document

• CISPR 11 Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement*， 2024-02-13 Update
• IEC 60664-1 IEC 60664-1-cor1{ed3.0}b*， 2024-04-18 Update
• IEC 60664-3 Insulation coordination for equipment within low-voltage systems - Part 3: Use of coating, potting or moulding for protection against pollution*， 2016-11-04 Update
• IEC 60721-3-1 Classification of environmental conditions — Part 3-1: Classification of groups of environmental parameters and their severities — Storage*， 2018-02-23 Update
• IEC 60721-3-2 Corrigendum 2 — Classification of environmental conditions — Part 3-2: Classification of groups of environmental parameters and their severities — Transportation and handling*， 2022-06-08 Update
• IEC 60721-3-3 Classification of environmental conditions - Part 2-4: Environmental conditions appearing in nature - Solar radiation and temperature*， 2019-05-22 Update
• IEC 60947-5-1 Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - Electromechanical control circuit devices*， 2024-03-26 Update
• IEC 60947-5-4 Low-voltage switchgear and controlgear - Part 5-4: Control circuit devices and switching elements - Method of assessing the performance of low-energy contacts - Special tests CONSOLIDATED EDITION*， 2019-05-22 Update
• 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 insul*， 2020-10-27 Update
• IEC 61557-1 Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 1: General requirements*， 2019-07-26 Update
• IEC 61810-2 Electromechanical elementary relays - Part 2: Reliability*， 2017-05-01 Update

BS EN 61557-8:2007 history

• 0000 BS EN 61557-8:2015(2016)
• 2015 BS EN 61557-8:2015 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. Insulation monitoring devices for IT systems
• 2007 BS EN 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 - Insulation monitoring devices for IT systems