FprEN IEC 61109:2024

SLOVENSKI STANDARD
oSIST prEN IEC 61109:2024
01-februar-2024
Izolatorji za nadzemne vode - Sestavljeni obesni in strižni izolatorji za izmenične
sisteme z nazivno napetostjo nad 1 000 V - Definicije, preskusne metode in
prevzemna merila
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
Isolatoren für Freileitungen - Verbund-Hänge- und -Abspannisolatoren für
Wechselstromsysteme mit einer Nennspannung über 1 000 V - Begriffe, Prüfverfahren
und Annahmekriterien
Isolateurs pour lignes aériennes - Isolateurs composites de suspension et d'ancrage
destinés aux systèmes à courant alternatif de tension nominale supérieure à 1 000 v -
Définitions, méthodes d'essai et critères d'acceptation
Ta slovenski standard je istoveten z: prEN IEC 61109:2023
ICS:
29.080.10 Izolatorji Insulators
29.240.20 Daljnovodi Power transmission and
distribution lines
oSIST prEN IEC 61109:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 61109:2024
oSIST prEN IEC 61109:2024
36/590/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61109 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-12-08 2024-03-01
SUPERSEDES DOCUMENTS:
36/583/RR
IEC TC 36 : INSULATORS
SECRETARIAT: SECRETARY:
Sweden Mr Dan Windmar
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 11
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
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the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
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

PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
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oSIST prEN IEC 61109:2024
IEC CDV 61109 © IEC 2023 2 36/590/CDV

1 CONTENTS
2 CONTENTS . 2
3 FOREWORD. 5
4 INTRODUCTION . 7
5 1 Scope and object . 8
6 2 Normative references . 8
7 3 Terms, definitions and abbreviations . 8
8 3.1 Terms and definitions . 9
9 3.22 Abbreviations . 12
10 4 Identification . 12
11 5 Environmental conditions . 12
12 6 Transport, storage and installation . 13
13 7 Tolerances . 13
14 8 Classification of tests . 14
15 8.1 Design tests . 14
16 8.2 Type tests . 14
17 8.3 Sample tests . 15
18 8.4 Routine tests . 15
19 9 Design tests . 18
20 9.1 General . 18
21 9.2 Test specimens for IEC 62217 . 18
22 9.2.1 Tests on interfaces and connections of end fittings . 18
23 9.2.2 Tracking and erosion test . 19
24 9.2.3 Tests on core material . 19
25 9.2.4 Tests on core with housing . 19
26 9.3 Product specific pre-stressing for tests on interfaces and connections of end
27 fittings as in IEC 62217 . 19
28 9.3.1 Sudden load release . 19
29 9.3.2 Thermal-mechanical pre-stress . 19
30 9.4 Assembled core load-time tests . 20
31 9.4.1 Test specimens . 20
32 9.4.2 Mechanical load test . 20
33 10 Type tests . 21
34 10.1 Electrical tests on string insulator units . 21
35 10.2 Damage limit proof test and test of the tightness of the interface between
36 end fittings and insulator housing . 22
37 10.2.1 Test specimens . 22
38 10.2.2 Performance of the test . 23
39 10.2.3 Evaluation of the test . 23
40 11 Sample tests . 23
41 11.1 General rules . 23
42 11.2 Verification of dimensions (E1 + E2) . 25
43 11.3 Verification of the end fittings (E2) . 25
44 11.4 Verification of tightness of the interface between end fittings and insulator
45 housing (E2) and of the specified mechanical load, SML (E1) . 25
46 11.5 Galvanizing test (E2) . 26
47 11.6 Minimum sheath thickness. (E1) . 26
48 11.7 Re-testing procedure . 27
49 12 Routine tests . 28

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50 12.1 Mechanical routine test . 28
51 12.2 Visual examination . 28
52 Annex A (informative) Principles of the damage limit, load coordination and testing for
53 composite suspension and tension insulators . 29
54 A.1 Introductory remark . 29
55 A.2 Load-time behaviour and the damage limit . 29
56 A.3 Service load coordination . 30
57 A.4 Verification tests . 34
58 Annex B (informative) Example of two possible devices for sudden release of load . 35
59 B.1 Device 1 (Figure B.1) . 35
60 B.2 Device 2 (Figure B.2) . 35
61 Annex C (informative) Guidance on non-standard mechanical stresses and dynamic
62 mechanical loading of composite insulators . 37
63 C.1 Introductory remark . 37
64 C.2 Torsion loads . 37
65 C.3 Compressive (buckling) loads . 37
66 C.4 Bending loads. 38
67 C.5 Dynamic mechanical loads . 38
68 C.6 Limits . 38
69 Annex D (informative) Electric field control for AC . 39
70 Annex E (informative) Typical sketches for composite insulator assemblies . 41
71 Annex F (informative) Mechanical evaluation of the adhesion between core and
72 housing . 42
73 F.1 Introduction . 42
74 F.2 Method A: Pull-off test . 42
75 F.2.1 Specimens . 42
76 F.2.2 Procedure . 43
77 F.3 Method B: Peel test . 44
78 F.3.1 Specimens . 44
79 F.3.2 Procedure . 45
80 F.4 Method C: Shear test . 45
81 F.4.1 Specimens . 45
82 F.4.2 Procedure . 46
83 Annex G (informative) Applicability of design- and type tests for DC applications . 47
oSIST prEN IEC 61109:2024
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85 Figure 1 − Thermal-mechanical pre-stressing . 20
86 Figure 3 − Method of re-testing at different stages . 27
87 Figure A.1 − Load-time strength and damage limit of a core assembled with fittings . 30
88 Figure A.2 – Graphical representation of the relationship of the damage limit to the
89 mechanical characteristics and service loads of an insulator with a 16 mm diameter
90 core 31
91 Figure A.3 – Applied specific force relationship example 1 . 32
92 Figure A.4 – Applied specific force relationship example 2 . 33
93 Figure A.5 – Test loads . 34
94 Figure B.1 − Example of possible device 1 for sudden release of load . 35
95 Figure B.2 − Example of possible device 2 for sudden release of load . 36
96 Figure C.1 – Example of compression loads in V-string assemblies . 38
97 Figure E.1.- Interface description for insulator with housing made by modular assembly
98 and external sealant . 41
99 Figure E.2.- Interface description for insulator with housing made by injection molding
100 and overmolded end fitting . 41
101 Figure F.1 − Example for type of housing separation . 42
102 Figure F.2 − Example of test object for pull-off test and application clamping and force
103 43
104 Figure F.3 − Relevant dimensions for the calculation of the area of the pull-off section
105 44
106 Figure
...