prEN IEC 60079-45:2024

SLOVENSKI STANDARD
01-september-2024
Eksplozivne atmosfere - 45. del: Električni sistemi za vžig motorjev z notranjim
izgorevanjem
Explosive atmospheres - Part 45: - Electrical ignition systems for internal combustion
engines
Ta slovenski standard je istoveten z: prEN IEC 60079-45:2024
ICS:
27.020 Motorji z notranjim Internal combustion engines
zgorevanjem
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

31/1776/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60079-45 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-06-28 2024-09-20
SUPERSEDES DOCUMENTS:
31/1717/NP, 31/1751/RVN
IEC TC 31 : EQUIPMENT FOR EXPLOSIVE ATMOSPHERES
SECRETARIAT: SECRETARY:
United Kingdom Mr Tom Stack
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

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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clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Explosive atmospheres - Part 45 - Electrical Ignition Systems for Internal Combustion Engines

PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You
may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without permis sion
in writing from IEC.
31/1776/CDV – 2 – IEC CDV 60079-45 ED1 © IEC: 2024
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 System overview . 11
10 4.1 General . 11
11 4.2 Spark containment . 11
12 4.3 Spark prevention . 11
13 4.4 Spark detection/prevention . 12
14 4.5 Ignition System Equipment . 12
15 5 Construction and testing requirements . 13
16 5.1 General . 13
17 5.2 Impact . 13
18 5.3 Chemical Compatibility . 13
19 5.4 Terminations and Connections . 13
20 5.5 Power source . 14
21 5.6 Engine Control Module and Ignition Control Unit . 14
22 5.7 Engine primary wiring . 14
23 5.8 Ignition coils . 15
24 5.9 Secondary leads . 15
25 5.9.1 General . 15
26 5.9.2 Flexible Secondary Lead . 15
27 5.9.3 Rigid Secondary Lead . 16
28 5.10 Spark plugs. 16
29 6 Spark containment . 16
30 7 Spark Prevention .
31 7.1 General . 16
32 7.2 Terminations, connections, and enclosures . 16
33 7.3 Ignition coil requirements . 17
34 7.4 Spark plug well applications . 17
35 8 Spark detection/prevention . 17
36 8.1 General . 17
37 8.2 Design Requirements . 17
38 9 Ex Equipment certificate . 17
39 10 Marking . 18
40 10.1 General . 18
41 10.2 Warning markings . 18
42 10.3 Example markings . 19
43 11 Manufacturer’s instructions . 20
44 11.1 General . 20
45 11.2 Instruction requirements . 20
46 11.3 Warnings . 20
47 11.4 Commissioning checklist . 21

IEC CDV 60079-45 ED1 © IEC: 2024 – 3 – 31/1776/CDV
48 11.5 Maintenance recommendations . 21
49 12 Test procedures . 22
50 12.1 Abrasion test for flexible secondary leads . 23
51 12.1.1 Abrasive wheel test . 23
52 12.1.2 Emery cloth abrasion test . 23
53 12.2 Ignition coils, extensions or non-flexible secondary leads elevated
54 temperature exposure test . 24
55 12.3 Chemical compatibility . 25
56 12.3.1 Chemical compatibility for non-flexible leads and equipment . 25
57 12.3.2 Chemical compatibility for Flexible Leads . 25
58 12.4 Vibration test . 26
59 12.5 Shielded secondary system tests . 28
60 12.5.1 Explosion test exemption for metallic flexible leads. 28
61 12.6 Spark plug gas tightness test . 29
62 12.6.1 Spark plug gas tightness test (primary test) . 29
63 12.6.2 Spark plug gas tightness test (alternate test) . 29
64 12.7 Flashover tests . 30
65 12.7.1 General . 30
66 12.7.2 Rigid secondary lead test configuration . 30
67 12.7.3 Flexible lead test configurations . 31
68 12.8 Flexible Secondary lead bending and dielectric voltage withstand tests . 32
69 12.9 Spark prevention test . 33
70 12.10 Primary and secondary lead terminations pull test . 34
71 12.11 Flexible Secondary lead pull test . 35
72 Annex A (informative) Guidance for Spark Containment . 36
73 Annex B (informative) Guidance for spark prevention . 37
74 Bibliography . 45
76 Figure 1 – Components of an electrical ignition system . 12
77 Figure 2 – Warning “do not disconnect” pictogram . 19
78 Figure 3 – Abrasive wheel test apparatus . 23
79 Figure 4 – Emery cloth abrasion test apparatus . 24
80 Figure 5 – Vibration Curve . 27
81 Figure 6 – Flexible lead example . 28
82 Figure 7 – Spark Plug test apparatus . 29
83 Figure 8 – Rigid secondary flashover test apparatus . 30
84 Figure 9 – Flexible hybrid secondary flashover test apparatus . 31
85 Figure 10 – Flexible secondary flashover test apparatus . 32
86 Figure 11 – Flexible secondary dielectric voltage withstand test apparatus . 33
87 Figure 12 – Secondary lead or wiring insulation cut test apparatus . 35
88 Figure B.1 – Guidance Flowchart for Spark Prevention Testing . 37
89 Figure B.2 – Terminations, Connections and Enclosures Test . 38
90 Figure B.3 – Cut Test . 39
91 Figure B.4 – Abrasion Test . 40
92 Figure B.5 – Chemical Compatibility . 41
93 Figure B.6 – Pull Test . 42
94 Figure B.7 – Ignition Coils and Rigid Extenders Test . 43
95 Figure B.8 – Spark Prevention Test . 44

31/1776/CDV – 4 – IEC CDV 60079-45 ED1 © IEC: 2024
97 Table 1 – List of critical parameters . 18
98 Table 2 – List of performance tests . 22
99 Table 3 – Chemical compatibility.
...