prEN IEC 62561-8:2025

SLOVENSKI STANDARD
01-september-2025
Elementi za zaščito pred strelo (LPSC) - 8. del: Elementi za zaščito pred strelo
(LPSC) - 8. del: Zahteve za elemente električno izoliranega sistema LPS
Lightning protection system components (LPSC) - Part 8: Requirements for components
for electrically insulated LPS
Composants de système de protection contre la foudre (CSPF) - Partie 8: Exigences
pour les composants de système isolé de protection contre la foudre
Ta slovenski standard je istoveten z: prEN IEC 62561-8:2025
ICS:
91.120.40 Zaščita pred strelo Lightning protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

81/796/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62561-8 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-08-01 2025-10-24
SUPERSEDES DOCUMENTS:
81/757/CD, 81/766C/CC
IEC TC 81 : LIGHTNING PROTECTION
SECRETARIAT: SECRETARY:
Italy Mrs Marina Bernardi
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
SC 37A,TC 64,TC 88
ASPECTS CONCERNED:
Safety
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The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
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Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Lightning protection system components (LPSC) - Part 8: Requirements for components for
electrically insulated LPS
PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
Based on the comments from GB2 in 81/766C/CC, the project title has been changed from "Lightning
protection system components (LPSC) – Part 8: Requirements for components for isolated LPS" to
"Lightning protection system components (LPSC) – Part 8: Requirements for components for electrically
insulated LPS".
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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IEC CDV 62561-8 Ed1 © IEC 2025

2 CONTENTS
4 FOREWORD . 5
5 INTRODUCTION . 7
6 1 Scope . 8
7 2 Normative references . 8
8 3 Terms and definitions . 9
9 4 Insulating stand-off . 11
10 4.1 Classification . 11
11 4.1.1 General . 11
12 4.1.2 According to conductor clamping arrangement . 11
13 4.1.3 According to mounting . 11
14 4.2 Requirements . 11
15 4.2.1 General . 11
16 4.2.2 Construction . 11
17 4.2.3 Mechanical requirements . 12
18 4.2.4 Electrical requirements . 13
19 4.2.5 Documentation and installation instructions . 14
20 4.2.6 Marking . 14
21 4.3 Tests . 15
22 4.3.1 General test conditions . 15
23 4.3.2 General test setup . 17
24 4.3.3 Documentation . 18
25 4.3.4 Marking test . 18
26 4.3.5 Environmental influence tests . 18
27 4.3.6 Mechanical tests . 19
28 4.3.7 Electrical test . 24
29 4.4 Electromagnetic compatibility (EMC) . 26
30 4.5 Structure and content of the test report . 26
31 4.5.1 General . 26
32 4.5.2 Report identification . 26
33 4.5.3 Specimen description . 26
34 4.5.4 Characterization and condition of the test specimen and/or test
35 assembly . 27
36 5 Insulating down-conductor . 27
37 5.1 Classification . 27
38 5.2 Lightning current carrying capability . 28
39 5.3 Preferred values of equivalent separation distance s . 28
e
40 5.4 Requirements . 28
41 5.4.1 General . 28
42 5.4.2 Environmental requirements . 29
43 5.4.3 Mechanical requirements . 29
44 5.4.4 Electrical requirements . 29
45 5.4.5 Documentation . 30
46 5.4.6 Marking . 30
47 5.5 Tests . 30
48 5.5.1 General test conditions . 30
IEC CDV 62561-8 Ed1 © IEC 2025

49 5.5.2 General test setup . 32
50 5.5.3 Documentation . 32
51 5.5.4 Marking test . 32
52 5.5.5 Environmental influence tests . 32
53 5.5.6 Mechanical tests . 34
54 5.5.7 Electrical tests . 35
55 5.6 Electromagnetic compatibility (EMC) . 39
56 5.7 Structure and content of the test report . 39
57 5.7.1 General . 39
58 5.7.2 Report identification . 40
59 5.7.3 Specimen description . 40
60 5.7.4 Characterization and condition of the test specimen and/or test
61 assembly . 40
62 5.7.5 Insulating Down-Conductor . 40
63 5.7.6 Standards and references . 40
64 5.7.7 Test procedure . 41
65 5.7.8 Testing equipment description . 41
66 5.7.9 Measuring instruments description . 41
67 5.7.10 Results and parameters recorded . 41
68 Annex A (normative) Environmental test – corrosion resistance . 42
69 A.1 General . 42
70 A.2 Salt mist test . 42
71 A.3 Humid sulphurous atmosphere test . 42
72 A.4 Ammonia atmosphere test . 42
73 Annex B (normative) Environmental test – resistance to ultraviolet light . 43
74 B.1 General . 43
75 B.2 Test . 43
76 B.3 First alternative test to clause B.2 . 43
77 B.4 Second alternative test to clause B.2 . 43
78 Annex C (normative) Flow chart of tests for insulating stand-offs . 44
79 Annex D (normative) Flow chart of tests for insulating down-conductors . 45
80 Annex E (informative) High voltage impulse test to determine the actual correction
81 factor k for insulating stand-offs . 46
x
82 E.1 Specimen preparation . 46
83 E.2 Test setup . 46
84 E.3 Test procedure . 46
85 Annex F (informative) Installation arrangement test to determine the influence of
86 supporting structures on the separation distance . 48
87 F.1 General . 48
88 F.2 Specimen preparation for the high voltage installation arrangement test . 48
89 F.3 Test procedure . 49
90 Annex G (normative) Alternate test arrangement for high voltage impulse test . 50
91 Annex H (normative) Applicability of previous tests . 52
92 Bibliography . 53
IEC CDV 62561-8 Ed1 © IEC 2025

95 Figure 1 - Typical insulating stand-off with a metallic fastener . 12
96 Figure 2 - Typical insulating stand-off with a non-metallic fastener . 13
97 Figure 3 - Typical insulating stand-off with a metallic fastener prepared for testing . 15
98 Figure 4 - Typical insulating stand-off with a non-metallic fastener prepared for testing
99 16
100 Figure 5 - Basic arrangement for bending test . 20
101 Figure 6 - Pendulum hammer test apparatus . 21
102 Figure 7 - Basic arrangements for pull out test on rigidly fixed insulating stand-off . 22
103 Figure 8 - Basic arrangements for pull out test on free standing insulating stand-off . 23
104 Figure 9 - Typical test arrangement for the high voltage impulse test of an insulating
105 stand-off . 24
106 Figure 10 - Specimen preparation for UV light test . 34
107 Figure 11 - Basic arrangement for the lightning current carrying capability test . 35
108 Figure 12 a - Test arrangement I for the high voltage impulse test of the insulating
109 down-conductor . 37
110 Figure 12 b - Alternate test arrangement II for the high voltage impulse test of t
...