IEC 62271-211-ed.2.0

Annotation of standard text IEC 62271-211-ed.2.0 :

IEC 62271-211:2024 is applicable to single- and three-phase direct connections between gas-insulated metal-enclosed switchgear (GIS) for rated voltages above 52 kV and transformer arrangements to establish electrical and mechanical interchange ability and to determine the limits of supply for the transformer connection. This second edition cancels and replaces the first edition of IEC 62271-211:2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) re-numbering of clauses according to IEC 62271-1:2017, b) Clause 3: updating definition about bushing (3.1), updating some pressure definitions (3.6, 3.7, 3.8, 3.9), rewording definition about proctor density (3.11), new term very-fast-front overvoltage (3.12), c) Clause 5 (former clause 4): add a subclause 5.1 General, according to IEC 62271-1:2017 and IEC 62271-203:2022, 1) subclause 5.5: new first paragraph, rewording second paragraph, 2) subclause 5.8: modify the term "Rated duration of thermal short-time current" of the bushing, d) Clause 6 (former Clause 5): restructure and rewording of subclauses: 1) 6.1 (former 5.3): requirements about gas and vacuum tightness of the transformer bushing 2) 6.3 (former 5.2): harmonization with IEC 62271-203:2022 about typical maximum pressure in service for SF6, other gases and gas mixtures, 3) 6.4 (former 5.8), rewording 4) 6.5 (former 5.1), some rewording and modification 5) 6.6 (former 5.4), some rewording, updated references 6) 6.7 (former 5.5), some rewording 7) 6.8 (former 5.6), some rewording 8) 6.9 (former 5.7), slight rewording, e) Clause 7 (former clause 6) type tests: some rewording and clarifications about references, f) Clause 8 (former clause 7) routine tests: 1) 8.2 (former 7.2): add a paragraph about SF6-mixtures and other gases than SF6, 2) 8.3 (former 7.3): update reference to relevant on-site test according to IEC 62271-203:2022, g) Clause 9 Guide to the selection of switchgear and controlgear (new): informative, to have a reference to IEC 62271-203:2022, h) Clause 11 (former 10): updated headline and updated reference according to IEC 62271-1:2017, i) new Clauses 12 Safety and 13 Environmental aspects: Adding of references to safety and environmental aspects, j) correction of errors in Corrigendum 2 of IEC 62271-211:2017, k) modified orientation of Figure 1 to Figure 4 for easier reading of the tables. LIEC 62271-211:2024 sapplique aux raccordements directs monophases et triphases entre lappareillage sous enveloppe metallique a isolation gazeuse (GIS) pour des tensions assignees superieures a 52 kV et des dispositions de transformateurs pour etablir des possibilites dechanges electriques et mecaniques et pour determiner les limites dalimentation pour le raccordement du transformateur. Cette seconde edition annule et remplace la premiere edition de lIEC 62271-211:2014. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) renumerotation des articles selon lIEC 62271-1:2017; b) Article 3: mise a jour de la definition de la traversee (3.1), mise a jour de certaines definitions relatives a la pression (3.6, 3.7, 3.8, 3.9), reformulation de la definition de la densite proctor (3.11), nouveau terme surtension a front tres rapide (3.12); c) Article 5 (ancien Article 4): ajout dun 5.1 Generalites, conformement a lIEC 62271-1:2017 et lIEC 62271-203:2022; 1) 5.5: nouveau premier alinea, reformulation du deuxieme alinea; 2) 5.8: modification du terme "duree assignee du courant de courte duree thermique" de la traversee; d) Article 6 (ancien Article 7): restructuration et reformulation des paragraphes: 1) 6.1 (ancien 5.3): exigences concernant letancheite du gaz et du vide de la traversee du transformateur; 2) 6.3 (ancien 5.2): harmonisation avec lIEC 62271-203:2022 en ce qui concerne la pression maximale type en service pour le SF6, dautres gaz et les melanges de gaz; 3) 6.4 (ancien 5.8): reformulation; 4) 6.5 (ancien 5.1): reformulation partielle et modification; 5) 6.6 (ancien 5.4): reformulation partielle, mise a jour de references; 6) 6.7 (ancien 5.5): reformulation partielle; 7) 6.8 (ancien 5.6): reformulation partielle; 8) 6.9 (ancien 5.7): legere reformulation; e) Article 7 (ancien Article 6), essais de type: reformulation partielle et clarifications des references; f) Article 8 (ancien Article 7), essais individuels de serie: 1) 8.2 (ancien 7.2): ajout dun alinea concernant les melanges de SF6 et dautres gaz que le SF6; 2) 8.3 (ancien 7.3): mise a jour de la reference pour lessai sur site applicable selon lIEC 62271-203:2022; g) Article 9 Guide pour le choix de lappareillage (nouveau): informatif, a des fins de reference a lIEC 62271-203:2022; h) Article 11 (ancien Article 10): mise a jour du titre et mise a jour de la reference conformement a lIEC 62271-1:2017; i) nouveaux Articles 12 Securite et 13 Aspects lies a lenvironnement: ajout de references a la securite et aux aspects lies a lenvironnement; j) correction derreurs dans le Corrigendum 2 de lIEC 62271-211:2017; k) modification de lorientation des Figures 1 a 4 afin de faciliter la lecture des tableaux.