IEC 62217-ed.3.0

Annotation of standard text IEC 62217-ed.3.0 :

IEC 62217:2025 is applicable to polymeric insulators for AC systems with a nominal voltage greater than 1 000 V (frequency less than 100 Hz) and DC systems with a nominal voltage greater than 1 500 V whose insulating body consists of one or various organic materials. Polymeric insulators covered by this document are intended for use both on HV overhead lines and in substations, in both indoor and outdoor applications. They include composite insulators with solid and hollow core and resin insulators. Hybrid insulators with ceramic core and polymeric housing are also included, while coated insulators (e.g. with RTV silicone rubber coatings) are not included in this standard. Electrical tests described in this document are done under AC voltage and are in general applicable to insulators to be used in DC systems too. Tests under DC voltage are intended to reflect up-to-date knowledge and experience. Only polymeric housing materials of hybrid insulators are specified in this document. Tests for core materials and the interfaces between housing and core of hybrid insulators are not included. The object of this document is - to define the common terms used for polymeric insulators; - to prescribe common test methods for design tests on polymeric insulators; - to prescribe acceptance or failure criteria, if applicable; These tests, criteria and recommendations are intended to ensure a satisfactory lifetime under normal operating and environmental conditions. This document includes design tests intended to reject materials or designs which are inadequate under normal operating and environmental conditions. This document defines test methods and acceptance criteria. The applicable tests are given in the relevant product standard. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) The scope of the document is specified to comprise composite insulators with solid and hollow core and resin insulators used for both AC and DC systems in indoor and outdoor applications of HV overhead lines and substations; hybrid insulators (defined in IEC TS 62896) with ceramic core and polymeric housing are also included, while coated insulators (e.g. with Room Temperature Vulcanized (RTV) silicone rubber coatings) are not considered in this document; b) Steep-front impulse voltage test is modified to avoid unwanted flashovers between the leads of the electrodes; c) Differences between hydrophobicity transfer material (HTM) and non-HTM housing materials are specified and relevant test methods and acceptance criteria for polymeric insulators with HTM housing are introduced; d) The previous water diffusion test on core materials with or without housing is split into two tests. One is on core materials without housing, the other is on core materials with housing. The acceptance criteria are modified; e) Stress corrosion test for core materials is introduced; f) Annex B summarizes the test application for evaluating the quality of interfaces and connections of end fittings, housing materials and core materials; g) Annex E is introduced to emphasize the need for control of electric fields of polymeric insulators for AC. The control of electric fields of polymeric insulators for DC is still under consideration. LIEC 62217:2025 sapplique aux isolateurs polymeriques pour systemes a courant alternatif de tension nominale superieure a 1 000 V (frequence inferieure a 100 Hz) et pour systemes a courant continu de tension nominale superieure a 1 500 V, dont le corps isolant est constitue dun ou de plusieurs materiaux organiques. Les isolateurs polymeriques couverts par le present document sont destines a etre utilises sur les lignes aeriennes HT et dans les postes, en interieur et en exterieur. Il sagit disolateurs composites a noyau plein et a noyau creux, ainsi que disolateurs en resine. Les isolateurs hybrides constitues dun noyau en ceramique et dun revetement en polymere sont egalement inclus, tandis que les isolateurs revetus (avec des revetements en caoutchouc silicone vulcanise a temperature ambiante (RTV), par exemple) ne sont pas couverts par la presente norme. Les essais electriques decrits dans le present document sont effectues sous une tension alternative et sappliquent generalement aux isolateurs destines a etre utilises dans des systemes a courant continu egalement. Les essais sous tension continue sont prevus pour refleter letat actuel des connaissances et de lexperience. Seuls les materiaux de revetement en polymere des isolateurs hybrides sont specifies dans le present document. Les essais pour les materiaux de noyau et les interfaces entre le revetement et le noyau des isolateurs hybrides ne sont pas inclus. Lobjet du present document est - de definir les termes couramment utilises pour les isolateurs polymeriques. - de specifier des methodes dessai communes pour les essais de conception sur les isolateurs polymeriques. - de specifier des criteres dacceptation ou de defaillance, le cas echeant. Ces essais, criteres et recommandations sont destines a procurer une duree de vie satisfaisante des isolateurs dans les conditions normales dexploitation et denvironnement (voir lArticle 5). Le present document comprend des essais de conception destines a rejeter les materiaux ou les conceptions qui ne conviennent pas dans des conditions normales dexploitation et denvironnement. Le present document definit les methodes dessai et les criteres dacceptation. Les essais applicables sont definis dans la norme de produit pertinente. Cette troisieme edition annule et remplace la deuxieme edition parue en 2012. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) le domaine dapplication du document couvre les isolateurs composi