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IEC 61557-5-ed.3.0
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 5: Resistance to earth
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STANDARD published on 26.7.2019
The information about the standard:
Designation standards: IEC 61557-5-ed.3.0
Publication date standards: 26.7.2019
SKU: NS-955671
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Measurement of electrical and magnetic quantitiesElectrical insulation in generalPower transmission and distribution networks in general
Annotation of standard text IEC 61557-5-ed.3.0 :
IEC 61557-5:2019 specifies the requirements applicable to measuring equipment for measuring the resistance to earth using an AC voltage. IEC 61557-5:2019 cancels and replaces the second edition published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) definitions and symbols in Clause 3 modified; b) subclauses in Clause 4 restructured and aligned with other parts of the series; c) limits for reduced voltages 25 V RMS or 35 V peak removed from 4.5; d) requirements for clamps added; e) marking for rated voltages to earth and measurement category added to Clause 5; f) warning about absence of hazardous voltage added in Clause 5; g) the term "percentage operating uncertainty" replaced by "operating uncertainty" in Clause 6; h) equation for uncertainty corrected in Table 1; i) new Annex A on test measurements with loop clamps added. LIEC 61557-5:2019 specifie les exigences applicables aux appareils de mesure destines a mesurer la resistance a la terre en utilisant une tension alternative. LIEC 61557-5:2019 annule et remplace la deuxieme edition parue en 2007. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) modification des definitions et symboles de lArticle 3; b) reorganisation des paragraphes de lArticle 4 et alignement sur les autres parties de la serie; c) suppression des limites de tensions reduites de 25 V (valeur efficace) ou de 35 V (valeur de crete) en 4.5; d) ajout dexigences relatives aux pinces; e) ajout du marquage relatif aux tensions assignees a la terre et a la categorie de mesure a lArticle 5; f) ajout dun avertissement relatif a labsence de tension dangereuse a lArticle 5; g) remplacement du terme "incertitude de fonctionnement en pourcentage" par "incertitude de fonctionnement" a lArticle 6; h) correction de lequation relative a lincertitude dans le Tableau 1; i) ajout de lAnnexe A relative aux mesures dessai avec des pinces de boucle.
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