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EN IEC 61557-9:2025/prAA:2025 Public enquiry
Comment end date 2025-11-28
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 9: Equipment for insulation fault location in IT systems

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.

prEN IEC 61557-18:2025 Public enquiry
Comment end date 2025-11-05
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 18: DC EV supply equipment insulation monitoring device
EN IEC 55016-1-1:2019/prA1:2025 Public enquiry
Comment end date 2025-10-21
Amendment 1 - Fragment 1: 18 GHz - 40 GHz Instrumentation
prEN IEC 63580:2025 Public enquiry
Comment end date 2025-10-21
Measuring equipment for electrical and electromagnetic quantities - Environmental aspects

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