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IEC 60077-4-ed.2.0
Railway applications - Electric equipment for rolling stock - Part 4: Electrotechnical components - Rules for AC circuit-breakers
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STANDARD published on 25.10.2019
The information about the standard:
Designation standards: IEC 60077-4-ed.2.0
Publication date standards: 25.10.2019
SKU: NS-974446
The number of pages: 60
Approximate weight : 180 g (0.40 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 60077-4-ed.2.0 :
IEC 60077-4:2019 gives rules for AC circuit-breakers, the main contacts of which are connected to AC overhead contact lines; the nominal voltage of these circuits being in accordance with IEC 60850. This document, together with IEC 60077-2, states specifically: a) the characteristics of the circuit-breakers; b) the service conditions with which circuit-breakers comply with reference to: - operation and behaviour in normal service; - operation and behaviour in short-circuit; - dielectric properties; c) the tests for confirming the compliance of the components with the characteristics under the service conditions and the methods to be adopted for these tests d). the information to be marked on, or given with the circuit-breaker. This second edition cancels and replaces the first edition, issued in 2003. This edition includes the following main technical changes with regard to the previous edition: a) standard values of transient recovery voltages and test procedure are reviewed; b) procedure of verification of temperature rise is changed; c) air-tightness test as type test, insulation resistance measurement are added L IEC 60077-4:2019 donne les regles relatives aux disjoncteurs a courant monophase dont les contacts principaux sont destines a etre raccordes a des lignes aeriennes de contact a courant monophase. La tension nominale de ces circuits est conforme a lIEC 60850. En complement de lIEC 60077-2, le present document precise particulierement: a) les caracteristiques des disjoncteurs; b) les conditions de service que les disjoncteurs supportent du point de vue: - du fonctionnement et du comportement en service normal; - du fonctionnement et du comportement en cas de court-circuit; - des proprietes dielectriques; c) les essais de conformite des composants avec les caracteristiques dans les conditions de service ainsi que les methodes dessai correspondantes a utiliser; d) les informations a donner ou a marquer sur le disjoncteur. Cette deuxieme edition annule et remplace la premiere edition, parue en 2003. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) les valeurs normalisees des tensions transitoires de retablissement et la procedure dessai sont revues; b) modification de la procedure de verification de lechauffement; c) ajout de lessai detancheite comme essai de type et du mesurage de la resistance disolement.
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