Active standard | Published: 14/12/2023

IEC 61557-9-ed.4.0

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
(Securite electrique dans les reseaux de distribution basse tension au plus egale a 1 000 V en C.A et 1 500 V en C.C - Dispositifs de controle, de mesure ou de surveillance de mesures de protection - Partie 9: Dispositifs de localisation de defauts d´isolement pour reseaux IT)

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Detail information

Designation: IEC 61557-9-ed.4.0

Publication date: 14/12/2023

Pages: 0

Country: International technical standard

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Anotation

IEC 61557-9:2023 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. IEC 61557-9:2023 cancels and replaces the third edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) new terms and definitions on maximum admissible locating AC and DC currents and voltages; b) the requirements on locating current and locating voltage have been revised; c) performance requirements have been added; d) the test requirements for locating current and locating voltage have been revised; e) the structure of this document has been adapted to that of IEC 61557-1:2019; f) the limit values under Clause A.2 were adapted to fit the changed test methods in 6.2.3. LIEC 61557-9:2023 specifie les exigences applicables aux dispositifs de localisation de defauts d’isolement (DLD) qui, independamment du principe de mesure, peuvent localiser les defauts d’isolement des parties de reseaux IT a courant alternatif non mis a la terre et des reseaux IT a courant alternatif non mis a la terre comprenant des circuits a courant continu relies galvaniquement dont les tensions nominales sont au plus egales a 1 000 V en courant alternatif, et de reseaux IT a courant continu non mis a la terre dont les tensions sont au plus egales a 1 500 V en courant continu. LIEC 61557-9:2023 annule et remplace la troisieme edition parue en 2014. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a l’edition precedente: a) ajout de nouveaux termes et de nouvelles definitions sur les courants et tensions, alternatifs et continus, de localisation maximaux admissibles; b) revision des exigences relatives au courant de localisation et a la tension de localisation; c) ajout d’exigences de performance; d) revision des exigences d’essai pour le courant de localisation et la tension de localisation; e) modification de la structure du present document pour s’adapter a l’IEC 61557-1:2019; f) modification des valeurs limites de l’Article A.2 pour s’adapter aux methodes d’essai modifiees en 6.2.3.

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