IEC TR 63482:2024

IEC TR 63482 ®
Edition 1.0 2024-07
TECHNICAL
REPORT
Maintenance of low voltage switchgear and controlgear and their assemblies
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IEC TR 63482 ®
Edition 1.0 2024-07
TECHNICAL
REPORT
Maintenance of low voltage switchgear and controlgear and their assemblies

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.130.20 ISBN 978-2-8322-9457-4

– 2 – IEC TR 63482:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Recommended safety measures . 9
4.1 Local regulations . 9
4.2 Appropriate skill level for maintenance . 9
4.3 Good practice and procedures for establishing a safe working environment . 9
4.3.1 Working procedures . 9
4.3.2 Emergency exits . 10
4.3.3 Fire extinguishing equipment . 10
4.3.4 First aid . 10
4.3.5 Lighting . 10
4.3.6 Access . 10
4.3.7 Isolation before and during maintenance work . 11
4.3.8 Working on live equipment . 11
4.3.9 Insulating equipment . 12
4.3.10 Earthing equipment . 12
4.3.11 Stored electrical energy . 12
4.3.12 Associated section of the installation . 12
4.3.13 Portable electric tools and inspection lamps . 12
4.3.14 Testing instrument . 12
4.3.15 Avoidance of contamination . 13
4.3.16 Temporary safety signs or labels . 13
5 Maintenance contributes to circular economy . 13
5.1 General . 13
5.2 Maintenance to extend lifetime . 13
5.2.1 General . 13
5.2.2 Maintenance to reduce carbon footprint . 13
5.2.3 Maintenance to maximise material efficiency . 13
5.3 Reused, refurbished and remanufactured products . 14
6 Electrical preventive maintenance . 14
6.1 General . 14
6.2 Values and benefits of electrical preventive maintenance. 14
7 Maintenance category of assemblies . 14
7.1 General . 14
7.2 Preventive maintenance categories . 15
7.2.1 Scheduled maintenance. 15
7.2.2 Condition-based maintenance . 15
7.2.3 Predictive maintenance . 15
8 Implementation and management of maintenance . 15
8.1 General . 15
8.2 Skill levels . 16
8.2.1 General . 16
8.2.2 Skill level 1 . 16

8.2.3 Skill level 2 . 16
8.2.4 Skill level 3 . 17
8.3 Maintenance instructions . 17
8.4 Periodic verification . 18
8.5 Replacement parts . 18
8.6 Re-energisation . 18
8.7 Documentation and records . 18
9 Maintenance categories and associated functionalities . 18
9.1 General . 18
9.2 Maintenance category over lifetime of an assembly . 19
9.3 Functions necessary to achieve a specific maintenance category . 19
9.4 Details to be available for each category of maintenance . 19
9.5 Shift from one category to another . 20
Annex A (informative) Maintenance plan according to maintenance level . 21
Annex B (informative) List of notes concerning certain countries . 23
Annex C (informative) Frequency of periodic verification . 24
C.1 Environmental conditions and device operating condition . 24
C.1.1 General . 24
C.1.2 Favourable environmental conditions and device operating conditions . 24
C.1.3 Normal environmental conditions and device operating conditions . 25
C.1.4 Severe environmental conditions and device operating conditions . 25
C.2 Criticality of user application . 25
C.3 Recommended frequency for maintenance program . 26
Bibliography . 27

Table 1 – Maintenance operation level . 17
Table 2 – Functions associated with each category of maintenance . 19
Table 3 – Details to be available for each category of maintenance . 20
Table A.1 – Maintenance plan . 21
Table C.1 – Favourable environmental conditions . 24
Table C.2 – Normal environmental conditions . 25
Table C.3 – Severe environmental conditions . 25
Table C.4 – Recommended frequency according to operating conditions and criticality

of the user application . 26

– 4 – IEC TR 63482:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAINTENANCE OF LOW-VOLTAGE SWITCHGEAR
AND CONTROLGEAR AND THEIR ASSEMBLIES

FOREWORD
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