IEC TS 63527:2025

SLOVENSKI STANDARD
01-oktober-2025
Varno upravljanje in obratovanje električnih postrojev (IEC TS 63527:2025)
Safe management and operation of electrical installations (IEC TS 63527:2025)
Gestion et exploitation en toute sécurité des installations électriques (IEC TS
63527:2025)
Ta slovenski standard je istoveten z: IEC TS 63527:2025
ICS:
29.260.10 Električne inštalacije za Electrical installations for
uporabo na prostem outdoor use
91.140.01 Napeljave v stavbah na Installations in buildings in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

IEC TS 63527 ®
Edition 1.0 2025-08
TECHNICAL
SPECIFICATION
Safe management and operation of electrical installations
ICS 29.260.10; 91.140.01 ISBN 978-2-8327-0634-3
CONTENTS
FOREWORD. 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
3.1 General . 9
3.2 Personnel, organization and communication . 10
3.3 Working zone . 12
3.4 Working . 12
3.5 Protective devices . 14
3.6 Voltages . 15
3.7 Distances . 15
3.8 Miscellaneous . 17
3.9 Symbols . 17
4 Basic principles . 18
4.1 Safe operation (3.1.2) . 18
4.2 Personnel . 19
4.3 Organization . 19
4.3.1 General . 19
4.3.2 The installation manager (3.2.1) . 20
4.3.3 The operation controller (3.2.2) . 20
4.3.4 The work controller (3.2.3) . 20
4.3.5 The worker (3.2.4) . 20
4.3.6 Skilled person in electricity . 21
4.3.7 Instructed person in electricity . 21
4.3.8 ordinary person (3.2.7) in electricity . 21
4.3.9 Complexity of work activity (3.4.1) . 21
4.3.10 Objections for safety . 21
4.4 Communication (transmission of information) . 22
4.5 Work location . 22
4.6 Tools, equipment and devices . 22
4.7 Drawings and records . 23
4.8 Signs . 23
4.9 Emergency arrangements . 23
4.10 Types of supervision (3.4.11) . 24
4.11 Determination of distances . 24
4.11.1 General . 24
4.11.2 Limit distances . 24
4.11.3 Determination of working distances . 28
4.12 Assessment of competence (3.8.2) and authorization (3.4.9) of persons . 28
4.13 Planning the work . 29
4.14 electrical safety rules (3.2.9) . 30
5 Operational procedures . 31
5.1 General . 31
5.2 Operating activities . 31
5.3 Measurement . 32
5.4 Testing . 32
5.5 Inspection . 32
6 Working procedures . 33
6.1 General . 33
6.1.1 General requirements . 33
6.1.2 Specific requirements in case of induction . 35
6.1.3 Specific requirements according to weather conditions . 35
6.2 Dead working (3.4.8) . 35
6.2.1 General . 35
6.2.2 Disconnect completely . 36
6.2.3 Secure against re-connection . 36
6.2.4 Verify absence of operating voltage (3.6.4) . 36
6.2.5 Earthing and short-circuiting . 37
6.2.6 Protection against adjacent live parts . 39
6.2.7 permission to start work (3.4.10) . 39
6.2.8 Re-energizing after work . 39
6.3 Live working (3.4.4) . 39
6.3.1 General . 39
6.3.2 Training and qualification . 40
6.3.3 Maintenance of personnel ability . 40
6.3.4 Working methods . 40
6.3.5 Working instructions . 41
6.3.6 Tools, equipment and devices . 41
6.3.7 Environmental conditions . 41
6.3.8 Organization of work . 42
6.3.9 Specific requirements for extra-low voltage installations . 43
6.3.10 Specific requirements for low voltage installations . 43
6.3.11 Specific requirements for high voltage installations . 43
6.3.12 Specific works on live parts . 43
6.4 Working within the vicinity zone (3.4.5) . 43
6.4.1 General . 43
6.4.2 Protection by screen (3.5.1), barrier (3.5.2), enclosure (3.5.4) or
protective cover (3.5.3) . 44
6.4.3 Protection by safe distance and supervision (3.4.11) . 45
6.5 Working outside the vicinity zone (3.3.3) . 45
6.5.1 General . 45
6.5.2 Specific requirements for non-electrical work (3.4.3), e.g. construction
work, and electrical work (3.4.2) . 45
7 Maintenance procedures . 46
7.1 General . 46
7.2 Personnel . 47
7.3 Repair work . 47
7.4 Replacement work . 48
7.4.1 Replacement of fuses . 48
7.4.2 Replacement of lamps and accessories . 48
7.5 Temporary interruption of maintenance work . 48
7.6 End of maintenance work . 48
Annex A (informative) Guidance for distances in air for working procedures . 49
A.1 Limit distances . 49
A.2 Working distances . 49
A.2.1 General . 49
A.2.2 Determination of the distance value related to the voltage level . 49
A.2.3 Considerations of tools, devices or equipment . 49
A.2.4 Ergonomic considerations . 50
A.2.5 Working distance for live working . 50
A.2.6 Working distance for working within the vicinity zone . 51
A.2.7 Working distance for working outside the vicinity zone . 52
Annex B (informative) Additional information for safe working . 54
B.1 Example for responsibility levels . 54
B.1.1 General scheme . 54
B.1.2 Domestic . 54
B.1.3 Small company or craftsman . 55
B.1.4 Large or Industrial company . 55
B.2 Example of application of live working . 55
B.3 Atmospheric conditions that are part of environmental conditions to be
assessed . 55
B.3.1 Precipitation . 55
B.3.2 Thick fog . 55
B.3.3 Thunderstorms . 55
B.3.4 Violent wind . 56
B.3.5 Salt storms . 56
B.3.6 Extra low temperature . 56
B.4 F
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