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IEC 61557-7-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 7: Phase sequence
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STANDARD published on 26.7.2019
The information about the standard:
Designation standards: IEC 61557-7-ed.3.0
Publication date standards: 26.7.2019
SKU: NS-955673
The number of pages: 28
Approximate weight : 84 g (0.19 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 61557-7-ed.3.0 :
IEC 61557-7:2019 specifies the requirements applicable to measuring equipment for testing the phase sequence in three-phase distribution systems. Indication of the phase sequence can be mechanical, visual and/or audible. This document does not apply to additional measurements for other quantities. It does not apply to monitoring relays. IEC 61557-7:2019 cancels and replaces the second edition published in 2007. This edition constitutes a technical revision. This edition includes the following changes with respect to the previous edition: a) alignment of the structure with that of the whole IEC 61557 series; b) updated requirements in 4.3 in accordance with new editions of IEC 61010-1 and IEC 61010-031; c) the information on markings was extended; d) the information on the operating instructions was extended; e) complement to the information on the testing of leads; f) test leads for insulated conductors were introduced; g) Annex B was added with information on phase sequence tests and indications. LIEC 61557-7:2019 specifie les exigences applicables aux appareils de mesure destines a soumettre a essai lordre des phases dans les reseaux de distribution triphases. Lindication de lordre des phases peut etre mecanique, visuelle et/ou audible. Le present document ne sapplique pas aux mesures supplementaires destinees a dautres grandeurs. Elle ne sapplique pas aux relais de surveillance. LIEC 61557-7:2019 annule et remplace la deuxieme edition parue en 2007. Cette edition constitue une revision technique. Cette edition inclut les modifications majeures suivantes par rapport a ledition precedente: a) alignement de la structure sur lensemble de la serie IEC 61557; b) mise a jour des exigences definies au 4.3 par rapport aux nouvelles editions de lIEC 61010-1 et de lIEC 61010-031; c) developpement des informations concernant le marquage; d) developpement des informations concernant les instructions de fonctionnement; e) developpement des informations concernant les essais des cables; f) les cables dessai pour conducteurs isoles ont ete introduits; g) lAnnexe B a ete ajoute avec information sur lessai dordre de phases et indication dordre de phases.
These changes apply to this standard:
IEC 61557-7-ed.3.0/Amd.1
Change
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Amendment 1 - 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 7: Phase sequence
(Amendement 1 - Securite electrique dans les reseaux de distribution basse tension au plus egale a 1 000 V en courant alternatif et 1 500 V en courant continu - Dispositifs de controle, de mesure ou de surveillance de mesures de protection - Partie 7: Ordre de phases)
Change published on 25.8.2023
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