IEC 61557-9 Ed. 4.0 b:2023

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 9: Equipment for insulation fault location in IT systems

International Electrotechnical Commission , 12/01/2023

Publisher: IEC

File Format: PDF

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Description

Standard By:International Electrotechnical Commission , 12/01/2023

Published:12/01/2023

Pages:70

ISBN(s):9782832278369

File Size:1 file , 1.2 MB

Language:English, French

Note:This product is unavailable in Ukraine, Russia, Belarus

This part of IEC 61557 specifies the requirements for the insulation fault location system (IFLS) that localizes insulation faults in any part of the system in unearthed IT AC systems and unearthed IT AC systems with galvanically connected DC circuits having nominal voltages up to 1 000 V AC, as well as in unearthed IT DC systems with voltages up to 1 500 V DC, independent of the measuring principle.

NOTE 1 IT systems are described in IEC 60364-4-41. Further information on insulation fault location can be found in the following International Standards: IEC 60364-4-41:2005, 411.6 and IEC 60364-4-41:2005/AMD1:2017, 411.6, and IEC 60364-5-53:2019/AMD1:2020, 531.3.

NOTE 2 This document covers both passive IFLS and active IFLS. Active IFLS can be used in de energised systems.

NOTE 3 This document does not cover IMD complying with IEC 61557-8.