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Standards Development
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. IT systems are described in IEC 60364-4-41. Additional data for a selection of devices in other standards should be noted. NOTE Further information on insulation fault location can be found in the following standards: IEC 60364-4-41:2005, 411.6, and IEC 60364-5-53:2019, 531.3.
The standard is published at IEC level and blocked at CENELEC level. Therefore, a NWI needs to be created to implement the Annexes ZA and ZZ as A11 for EN IEC 61557-9:2023. The basis is the one-to-one copy of IEC 61557-9:2023. The Amendment is regional. It will not be offered to IEC as it is a regional amendment linked to the LVD and EMCD legislation.
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