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eLibrary > IEC 61109 Ed. 3.0 en:2025 CMV Insulators for overhead lines - Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V - Definitions, test methods and acceptance criteria >

IEC 61109 Ed. 3.0 en:2025 CMV Insulators for overhead lines - Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V - Definitions, test methods and acceptance criteria, 2025

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IEC 61109 Ed. 3.0 en:2025 CMV Insulators for overhead lines - Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V - Definitions, test methods and acceptance criteria, 2025

Commented version (English only) [Go to Page]
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms [Go to Page]
3.1 Terms and definitions
3.2 Abbreviated terms
4 Identification
5 Environmental conditions
6 Transport, storage and installation
7 Tolerances
8 Classification of tests [Go to Page]
8.1 Design tests
8.2 Type tests
8.3 Sample tests
8.4 Routine tests
9 Design tests [Go to Page]
9.1 General
9.2 Test specimens [Go to Page]
9.2.1 Tests on interfaces and connections of end fittings
9.2.2 Tracking and erosion test
9.2.3 Tests on core material
9.2.4 Tests on core with housing
9.3 Product specific pre-stressing for tests on interfaces and connections of end fittings [Go to Page]
9.3.1 General
9.3.2 Sudden load release
9.3.3 Thermal-mechanical pre-stress
9.4 Assembled core load-time tests [Go to Page]
9.4.1 Test specimens
9.4.2 Mechanical load test
10 Type tests [Go to Page]
10.1 General
10.2 Electrical tests on string insulator units [Go to Page]
10.2.1 General
10.2.2 Test specimens
10.2.3 Mounting arrangements for electrical tests
10.2.4 Dry lightning impulse withstand voltage test
10.2.5 Wet power-frequency voltage tests
10.2.6 Wet switching impulse withstand voltage test
10.2.7 Corona and radio interference voltage (RIV) tests
10.2.8 Power arc test
10.3 Damage limit proof test and test of the tightness of the interface between end fittings and insulator housing [Go to Page]
10.3.1 Test specimens
10.3.2 Performance of the test
10.3.3 Evaluation of the test
11 Sample tests [Go to Page]
11.1 General rules
11.2 Verification of dimensions (E1 + E2)
11.3 Verification of the end fittings (E2)
11.4 Verification of tightness of the interface between end fittings and insulator housing (E2) and of the specified mechanical load, SML (E1)
11.5 Galvanizing test (E2)
11.6 Minimum sheath thickness (E1)
11.7 Re-testing procedure
12 Routine tests [Go to Page]
12.1 Mechanical routine test
12.2 Visual examination
Annexes [Go to Page]
Annex A (informative) Principles of the damage limit, load coordination and testing for composite suspension and tension insulators [Go to Page]
A.1 Introductory remark
A.2 Load-time behaviour and the damage limit
A.3 Service load coordination
A.4 Verification tests
Annex B (informative) Example of two possible devices for sudden release of load [Go to Page]
B.1 Device 1 (Figure B.1)
B.2 Device 2 (Figure B.2)
Annex C (informative) Guidance on non-standard mechanical stresses and dynamic mechanical loading of composite insulators [Go to Page]
C.1 Introductory remark
C.2 Torsion loads
C.3 Compressive (buckling) loads
C.4 Bending loads
C.5 Dynamic mechanical loads
C.6 Limits
Annex D (informative) Electric field control for AC
Annex E (informative) Typical sketches for composite insulator assemblies
Annex F (informative) Mechanical evaluation of the adhesion between core and housing [Go to Page]
F.1 General
F.2 Method A: Pull-off test [Go to Page]
F.2.1 General
F.2.2 Specimens
F.2.3 Procedure
F.3 Method B: Peel test [Go to Page]
F.3.1 General
F.3.2 Specimens
F.3.3 Procedure
F.4 Method C: Shear test [Go to Page]
F.4.1 General
F.4.2 Specimens
F.4.3 Procedure
Annex G (informative) Applicability of design and type tests for DC applications
Bibliography
Figures [Go to Page]
Figure 1 – Thermal-mechanical pre-stressing
Figure 2 – Examples for 1 min SML withstand test
Figure 3 – Location for minimum sheath thickness measurement
Figure 4 – Method of re-testing at different stages
Figure A.1 – Load-time strength and damage limit of a core assembled with fittings
Figure A.2 – Graphical representation of the relationship of the damage limit to the mechanical characteristics and service loads of an insulator with a 16 mm diameter core and an SML rating of 133 kN
Figure A.3 – Applied specific force relationship, example 1
Figure A.4 – Applied specific force relationship, example 2
Figure A.5 – Test loads
Figure B.1 – Example of possible device 1 for sudden release of load
Figure B.2 – Example of possible device 2 for sudden release of load
Figure C.1 – Example of compression loads in V-string assemblies
Figure C.2 – Buckling of composite insulator in a phase-to-phase configuration
Figure D.1 – Example for electrical field vectors on a composite insulator
Figure E.1 – Interface description for insulator with housing made by modular assembly and external sealant
Figure E.2 – Interface description for insulator with housing made by injection molding and overmolded end fitting
Figure F.1 – Example for type of housing separation
Figure F.2 – Example of specimen mounted in a tensile test machine
Figure F.3 – Example of test object for pull-off test and application clamping and force
Figure F.4 – Relevant dimensions for the calculation of the area of the pull-off section
Figure F.5 – Example of test specimen for peel test
Figure F.6 – Method of peel test and tested specimens after peel test
Figure F.7 – Method of shear test and tested samples after shear test with cohesive bonding, sample passed the test
Tables [Go to Page]
Table 1 – Normal environmental conditions
Table 2 – Tests to be carried out after design changes
Table 3 – Design tests
Table 4 – Application and mounting arrangements for electrical tests
Table 5 – Sample sizes
Table G.1 – Design and type tests for DC applications
List of comments
International Standard (Bilingual) [Go to Page]
English [Go to Page]
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms [Go to Page]
3.1 Terms and definitions
3.2 Abbreviated terms
4 Identification
5 Environmental conditions
6 Transport, storage and installation
7 Tolerances
8 Classification of tests [Go to Page]
8.1 Design tests
8.2 Type tests
8.3 Sample tests
8.4 Routine tests
9 Design tests [Go to Page]
9.1 General
9.2 Test specimens [Go to Page]
9.2.1 Tests on interfaces and connections of end fittings
9.2.2 Tracking and erosion test
9.2.3 Tests on core material
9.2.4 Tests on core with housing
9.3 Product specific pre-stressing for tests on interfaces and connections of end fittings [Go to Page]
9.3.1 General
9.3.2 Sudden load release
9.3.3 Thermal-mechanical pre-stress
9.4 Assembled core load-time tests [Go to Page]
9.4.1 Test specimens
9.4.2 Mechanical load test
10 Type tests [Go to Page]
10.1 General
10.2 Electrical tests on string insulator units [Go to Page]
10.2.1 General
10.2.2 Test specimens
10.2.3 Mounting arrangements for electrical tests
10.2.4 Dry lightning impulse withstand voltage test
10.2.5 Wet power-frequency voltage tests
10.2.6 Wet switching impulse withstand voltage test
10.2.7 Corona and radio interference voltage (RIV) tests
10.2.8 Power arc test
10.3 Damage limit proof test and test of the tightness of the interface between end fittings and insulator housing [Go to Page]
10.3.1 Test specimens
10.3.2 Performance of the test
10.3.3 Evaluation of the test
11 Sample tests [Go to Page]
11.1 General rules
11.2 Verification of dimensions (E1 + E2)
11.3 Verification of the end fittings (E2)
11.4 Verification of tightness of the interface between end fittings and insulator housing (E2) and of the specified mechanical load, SML (E1)
11.5 Galvanizing test (E2)
11.6 Minimum sheath thickness (E1)
11.7 Re-testing procedure
12 Routine tests [Go to Page]
12.1 Mechanical routine test
12.2 Visual examination
Annexes [Go to Page]
Annex A (informative) Principles of the damage limit, load coordination and testing for composite suspension and tension insulators
Annex B (informative) Example of two possible devices for sudden release of load
Annex C (informative) Guidance on non-standard mechanical stresses and dynamic mechanical loading of composite insulators
Annex D (informative) Electric field control for AC
Annex E (informative) Typical sketches for composite insulator assemblies
Annex F (informative) Mechanical evaluation of the adhesion between core and housing
Annex G (informative) Applicability of design and type tests for DC applications
Bibliography
Figures [Go to Page]
Figure 1 – Thermal-mechanical pre-stressing
Figure 2 – Examples for 1 min SML withstand test
Figure 3 – Location for minimum sheath thickness measurement
Figure 4 – Method of re-testing at different stages
Figure A.1 – Load-time strength and damage limitof a core assembled with fittings
Figure A.2 – Graphical representation of the relationship of the damage limit to the mechanical characteristics and service loads of an insulator with a 16 mm diameter core and an SML rating of 133 kN
Figure A.3 – Applied specific force relationship, example 1
Figure A.4 – Applied specific force relationship, example 2
Figure A.5 – Test loads
Figure B.1 – Example of possible device 1 for sudden release of load
Figure B.2 – Example of possible device 2 for sudden release of load
Figure C.1 – Example of compression loads in V-string assemblies
Figure C.2 – Buckling of composite insulator in a phase-to-phase configuration
Figure D.1 – Example for electrical field vectors on a composite insulator
Figure E.1 – Interface description for insulator with housing made by modular assembly and external sealant
Figure E.2 – Interface description for insulator with housing made by injection molding and overmolded end fitting
Figure F.1 – Example for type of housing separation
Figure F.2 – Example of specimen mounted in a tensile test machine
Figure F.3 – Example of test object for pull-off test and application clamping and force
Figure F.4 – Relevant dimensions for the calculation of the area of the pull-off section
Figure F.5 – Example of test specimen for peel test
Figure F.6 – Method of peel test and tested specimens after peel test
Figure F.7 – Method of shear test and tested samples after shear test with cohesive bonding, sample passed the test
Tables [Go to Page]
Table 1 – Normal environmental conditions
Table 2 – Tests to be carried out after design changes
Table 3 – Design tests
Table 4 – Application and mounting arrangements for electrical tests
Table 5 – Sample sizes
Table G.1 – Design and type tests for DC applications
Français [Go to Page]
SOMMAIRE
AVANT-PROPOS
INTRODUCTION
1 Domaine d'application
2 Références normatives
3 Termes, définitions et abréviations [Go to Page]
3.1 Termes et définitions
3.2 Abréviations
4 Identification
5 Conditions d'environnement
6 Transport, stockage et installation
7 Tolérances
8 Classification des essais [Go to Page]
8.1 Essais de conception
8.2 Essais de type
8.3 Essais sur prélèvements
8.4 Essais individuels de série
9 Essais de conception [Go to Page]
9.1 Généralités
9.2 Éprouvettes [Go to Page]
9.2.1 Essais sur les interfaces et les connexions des armatures d'extrémité
9.2.2 Essai de cheminement et d'érosion
9.2.3 Essais sur le matériau du noyau
9.2.4 Essais sur le noyau avec le revêtement
9.3 Précontrainte spécifique au produit pour les essais sur les interfaces et les connexions des armatures d'extrémité [Go to Page]
9.3.1 Généralités
9.3.2 Suppression brutale de la charge
9.3.3 Précontrainte thermomécanique
9.4 Essais de charge-temps du noyau assemblé [Go to Page]
9.4.1 Éprouvettes
9.4.2 Essai de charge mécanique
10 Essais de type [Go to Page]
10.1 Généralités
10.2 Essais électriques sur les éléments de chaîne d'isolateurs [Go to Page]
10.2.1 Généralités
10.2.2 Éprouvettes
10.2.3 Configurations de montage pour les essais électriques
10.2.4 Essai de tension de tenue aux chocs de foudre à sec
10.2.5 Essais de tension à fréquence industrielle sous pluie
10.2.6 Essai de tension de tenue aux chocs de manœuvre sous pluie
10.2.7 Essais d'effet couronne et de perturbations radioélectriques (RIV)
10.2.8 Essai d'arc de puissance
10.3 Essai de vérification de la limite d'endommagement et essai de vérification de l'étanchéité de l'interface entre les armatures d'extrémité et le revêtement de l'isolateur [Go to Page]
10.3.1 Éprouvettes
10.3.2 Déroulement de l'essai
10.3.3 Évaluation de l'essai
11 Essais sur prélèvements [Go to Page]
11.1 Règles générales
11.2 Vérification des dimensions (E1 + E2)
11.3 Vérification des armatures d'extrémité (E2)
11.4 Vérification de l'étanchéité de l'interface entre les armatures d'extrémité et le revêtement de l'isolateur (E2) et vérification de la charge mécanique spécifiée CMS (E1)
11.5 Essai de galvanisation (E2)
11.6 Épaisseur minimale de la gaine (E1)
11.7 Procédure de contre-épreuve
12 Essais individuels de série [Go to Page]
12.1 Essai mécanique de série
12.2 Examen visuel
Annexes [Go to Page]
Annexe A (informative) Principes de la limite d'endommagement, de la coordination de charges et des essais pour les isolateurs composites de suspension et d'ancrage
Annexe B (informative) Exemple de deux dispositifs possibles pour le relâchement brutal de la charge
Annexe C (informative) Recommandations pour les contraintes mécaniques non normalisées et les charges mécaniques dynamiques appliquées sur les isolateurs composites
Annexe D (informative) Maîtrise des champs électriques pour les applications en courant alternatif
Annexe E (informative) Croquis types pour l'assemblage des isolateurs composites
Annexe F (informative) Évaluation mécanique de l'adhérence entre le noyau et le revêtement
Annexe G (informative) Applicabilité des essais de conception et de type pour les applications en courant continu
Bibliographie
Figures [Go to Page]
Figure 1 – Précontrainte thermomécanique
Figure 2 – Exemples pour l'essai de tenue à la CMS pendant 1 min
Figure 3 – Positions de mesure de l'épaisseur minimale de la gaine
Figure 4 – Méthode de contre-épreuve à différentes étapes
Figure A.1 – Courbe résistance-temps et limite d'endommagement d'un noyau assemblé avec ses armatures
Figure A.2 – Représentation graphique de la relation entre la limite d'endommagement et les caractéristiques mécaniques et les charges de service d'un isolateur possédant un noyau d'un diamètre de 16 mm et une valeur caractéristique CMS de 133 kN
Figure A.3 – Exemple 1 de relation de force spécifique appliquée
Figure A.4 – Exemple 2 de relation de force spécifique appliquée
Figure A.5 – Charges d'essai
Figure B.1 – Exemple de dispositif possible 1 pour le relâchement brutal de la charge
Figure B.2 – Exemple de dispositif possible 2 pour le relâchement brutal de la charge
Figure C.1 – Exemples de charges de compression exercées dans les chaînes d'isolateurs en V
Figure C.2 – Flambage d'un isolateur composite dans une configuration biphasée
Figure D.1 – Exemple de vecteurs de champs électriques sur un isolateur composite
Figure E.1 – Description de l'interface pour un isolateur avec revêtement constitué d'un assemblage modulaire et d'un produit d'étanchéité externe
Figure E.2 – Description de l'interface pour un isolateur avec revêtement constitué d'un moulage par injection et d'une armature d'extrémité surmoulée
Figure F.1 – Exemples de types de séparations des revêtements
Figure F.2 – Exemple de spécimen fixé à une machine d'essai de traction
Figure F.3 – Exemple d'objet d'essai pour l'essai d'arrachementet application du serrage et de la force
Figure F.4 – Dimensions pertinentes pour le calcul de la surfacede la section d'arrachement
Figure F.5 – Exemple d'éprouvette pour l'essai de pelage
Figure F.6 – Méthode d'essai de pelage et spécimens observés après l'essai de pelage
Figure F.7 – Méthode d'essai de cisaillement et échantillons observés après l'essai de cisaillement – Séparation cohésive (l'échantillon a satisfait à l'essai)
Tableaux [Go to Page]
Tableau 1 – Conditions normales d'environnement
Tableau 2 – Essais à effectuer après des modifications de conception
Tableau 3 – Essais de conception
Tableau 4 – Application et configurations de montage pour les essais électriques
Tableau 5 – Tailles d'échantillons
Tableau G.1 – Essais de conception et de type pour les applications en courant continu [Go to Page]

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IEC 61109 Ed. 3.0 en:2025 CMV Insulators for overhead lines - Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V - Definitions, test methods and acceptance criteria, 2025

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IEC 61109 Ed. 3.0 en:2025 CMV Insulators for overhead lines - Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V - Definitions, test methods and acceptance criteria, 2025

⨯To continue with accurate pricing,
please select your company type below: