IEC 62217:2025
(Main)Polymeric HV insulators for indoor and outdoor use - General definitions, test methods and acceptance criteria
Polymeric HV insulators for indoor and outdoor use - General definitions, test methods and acceptance criteria
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.
Isolateurs polymériques à haute tension pour usage intérieur et extérieur - Définitions générales, méthodes d'essai et critères d'acceptation
L'IEC 62217:2025 s'applique aux isolateurs polymériques pour systèmes à courant alternatif de tension nominale supérieure à 1 000 V (fréquence inférieure à 100 Hz) et pour systèmes à courant continu de tension nominale supérieure à 1 500 V, dont le corps isolant est constitué d'un ou de plusieurs matériaux organiques. Les isolateurs polymériques couverts par le présent document sont destinés à être utilisés sur les lignes aériennes HT et dans les postes, en intérieur et en extérieur. Il s'agit d'isolateurs composites à noyau plein et à noyau creux, ainsi que d'isolateurs en résine. Les isolateurs hybrides constitués d'un noyau en céramique et d'un revêtement en polymère sont également inclus, tandis que les isolateurs revêtus (avec des revêtements en caoutchouc silicone vulcanisé à température ambiante (RTV), par exemple) ne sont pas couverts par la présente norme. Les essais électriques décrits dans le présent document sont effectués sous une tension alternative et s'appliquent généralement aux isolateurs destinés à être utilisés dans des systèmes à courant continu également. Les essais sous tension continue sont prévus pour refléter l'état actuel des connaissances et de l'expérience. Seuls les matériaux de revêtement en polymère des isolateurs hybrides sont spécifiés dans le présent document. Les essais pour les matériaux de noyau et les interfaces entre le revêtement et le noyau des isolateurs hybrides ne sont pas inclus.
L'objet du présent document est
- de définir les termes couramment utilisés pour les isolateurs polymériques.
- de spécifier des méthodes d'essai communes pour les essais de conception sur les isolateurs polymériques.
- de spécifier des critères d'acceptation ou de défaillance, le cas échéant.
Ces essais, critères et recommandations sont destinés à procurer une durée de vie satisfaisante des isolateurs dans les conditions normales d'exploitation et d'environnement (voir l'Article 5). Le présent document comprend des essais de conception destinés à rejeter les matériaux ou les conceptions qui ne conviennent pas dans des conditions normales d'exploitation et d'environnement. Le présent document définit les méthodes d'essai et les critères d'acceptation. Les essais applicables sont définis dans la norme de produit pertinente. Cette troisième édition annule et remplace la deuxième édition parue en 2012. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) le domaine d'application du document couvre les isolateurs composites à noyau plein ou creux, ainsi que les isolateurs en résine utilisés avec des systèmes à courant alternatif et à courant continu, en intérieur et en extérieur, sur les lignes aériennes HT et dans les postes; les isolateurs hybrides (définis dans l'IEC TS 62896) constitués d'un noyau en céramique et d'un revêtement en polymère sont également inclus, tandis que les isolateurs revêtus (avec des revêtements en caoutchouc silicone vulcanisé à température ambiante (RTV), par exemple) ne sont pas couverts par le présent document;
b) l'essai sous onde de choc à front raide a été modifié pour éviter des contournements indésirables entre les conducteurs des électrodes;
c) les différences entre le matériau de transfert d'hydrophobie (HTM - Hydrophobicity Transfer Material) et les matériaux de revêtement non HTM ont été spécifiées, et les méthodes d'essai et les critères d'acceptation pertinents pour les isolateurs polymériques avec revêtement HTM ont été ajoutés;
d) l'essai précédent de pénétration d'eau sur les matériaux de noyau avec ou sans le revêtement a été divisé en deux essais. L'un porte sur les matériaux de noyau sans le revêtement, l'autre sur les matériaux de noyau avec le revêtement. Les critères d'acceptation ont été modifiés;
e) l'essai de corrosion sous contrainte pour les matériaux de noyau a été ajouté;
f) l'Annexe B récapitule l'application de l'essai pour évaluer la qua
General Information
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Standards Content (Sample)
IEC 62217 ®
Edition 3.0 2025-10
INTERNATIONAL
STANDARD
COMMENTED VERSION
Polymeric HV insulators for indoor and outdoor use - General definitions, test
methods and acceptance criteria
ICS 29.080.10 ISBN 978-2-8327-0765-4
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CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope and object . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Identification . 12
5 Environmental conditions . 12
6 Information on transport, storage and installation . 14
7 Classification of tests . 14
7.1 General . 14
7.2 Design tests . 14
7.3 Type tests . 14
7.4 Sample tests . 14
7.5 Routine tests . 15
8 General requirements for insulator test specimens . 15
9 Design tests . 15
9.1 General . 15
9.2 Tests on interfaces and connections of end fittings . 16
9.2.1 General . 16
9.2.2 Test specimens . 16
9.2.3 Reference flashover voltage and reference temperature for verification
tests . 16
9.2.4 Reference dry power frequency test .
9.2.4 Reference flashover voltage test. 16
9.2.5 Product specific pre-stressing . 17
9.2.6 Water immersion pre-stressing . 17
9.2.7 Verification tests . 17
9.3 Tests on shed and housing material . 19
9.3.1 Hardness test . 19
9.3.2 Accelerated weathering test . 21
9.3.3 Tracking and erosion test – 1 000 h salt fog AC voltage test –
Procedure . 22
9.3.4 Flammability test . 25
9.3.5 Hydrophobicity transfer test . 25
9.4 Tests on core material . 26
9.4.1 General . 26
9.4.2 Porosity test (Dye penetration test) . 27
9.4.3 Water diffusion test . 29
9.4.4 Stress corrosion test . 31
9.5 Water diffusion test on core with housing . 31
9.5.1 General . 31
9.5.2 Test specimens . 32
9.5.3 Test procedure . 32
9.5.4 Acceptance criteria . 32
Annex CA (informative) Explanation of the concept of classes for the design tests . 33
Annex B (informative) Recommended test application of tests . 34
Annex C (informative) Tests for AC or DC application . 36
Annex AD (informative) Difference between the tracking and erosion and accelerated
ageing test on polymeric insulators . 37
Annex E (informative) Consideration of electric field control . 38
Bibliography . 40
List of comments. 41
Figure 1 – Illustration of different types of insulators . 9
Figure 2 – Illustration of the electrodes position and axial length . 18
Figure 2 3 – – Example of boiling container for the water diffusion test . 21
Figure 1 4 – Examples of test specimen for core material . 27
Figure 5 – Example of porosity test specimen with certain areas not being allowed to
be sealed . 29
Figure 3 – Electrodes for the voltage test .
Figure 4 – Voltage test circuit .
Figure E.1 – Typical sealing area description for composite insulator . 39
Table 1 – Normal environmental conditions . 13
Table 2 – Initial NaCI content of the water as a function of the specimen dimensions . 24
Table 3 – Flammability requirements . 25
Table B.1 – Application on interfaces and connections of end fittings. 34
Table B.2 – Application on housing materials . 35
Table B.3 – Application on core materials . 35
Table B.4 – Application on core with housing . 35
Table C.1 – Tests for AC or DC application . 36
INTERNATIONAL ELECTROTECHNICAL COMMISSION
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Polymeric HV insulators for indoor and outdoor use -
General definitions, test methods and acceptance criteria
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