IEC TS 61400-30:2023

IEC TS 61400-30 ®
Edition 1.0 2023-09
TECHNICAL
SPECIFICATION
colour
inside
Wind energy generation systems –
Part 30: Safety of wind turbine generators – General principles for design

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IEC TS 61400-30 ®
Edition 1.0 2023-09
TECHNICAL
SPECIFICATION
colour
inside
Wind energy generation systems –

Part 30: Safety of wind turbine generators – General principles for design

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.180 ISBN 978-2-8322-7439-2

– 2 – IEC TS 61400-30:2023 © IEC 2023
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 11
4 Principal elements . 16
4.1 General . 16
4.2 Significant hazards . 16
4.3 Frequency of exposure . 16
5 Control systems . 17
5.1 General . 17
5.2 Control devices . 17
5.3 Operating modes . 17
5.4 Safety functions . 18
5.5 Emergency stop . 18
5.6 Failure of external power supply . 19
6 Isolation of energy sources . 19
7 Electrical systems . 20
7.1 General requirements . 20
7.2 Protection provided by enclosures . 21
7.3 High voltage installation . 21
7.4 Low voltage installation . 22
7.5 Electrostatic discharge . 22
7.6 Batteries and UPS . 22
7.7 Arc flash mitigation and modelling . 22
8 Mechanical systems . 23
8.1 General requirements . 23
8.2 Foundations and substructures . 23
8.2.1 General . 23
8.2.2 Specific requirements for offshore substructures . 23
8.3 Tower . 24
8.3.1 Tower internals . 24
8.3.2 Cable management . 24
8.4 Yaw system . 24
8.5 Blade pitch system . 24
8.6 Hub and spinner . 25
8.7 Blade . 25
8.8 Hydraulic and pneumatic systems . 25
8.9 Drive train . 25
8.10 Braking system . 26
8.11 Rotor locking system . 26
8.12 Nacelle . 26
8.13 Internal crane. 26
9 Working environment . 27
9.1 General requirements . 27
9.2 Access . 27
9.2.1 General . 27

9.2.2 Doorways . 28
9.2.3 Stairs and stepladders . 31
9.2.4 Fixed ladders . 31
9.2.5 Provisions for personal fall protection . 34
9.2.6 Access platforms . 37
9.2.7 Space in front of electrical panels . 37
9.2.8 Bluntness of edges . 39
9.2.9 Climbing assistance . 40
9.2.10 Service lift . 40
9.2.11 Helihoist and aviation aids . 41
9.2.12 Offshore vessel access . 44
9.3 Working conditions. 45
9.3.1 Noise exposure . 45
9.3.2 Vibration . 45
9.3.3 Radiation . 46
9.3.4 Thermal . 46
9.3.5 Air quality . 46
9.3.6 Restricted and confined spaces . 46
9.4 Ergonomic . 47
9.4.1 General . 47
9.4.2 Human machine interfaces . 47
10 Lighting systems . 47
10.1 General . 47
10.1.1 Lighting for safety in wind turbines . 47
10.1.2 Internal lighting . 47
10.1.3 External lighting . 48
10.2 Design requirements for lighting systems . 48
10.3 Design requirements for emergency lighting systems . 48
10.4 Illumination levels . 49
10.5 Illumination level assessment . 49
10.5.1 General . 49
10.5.2 Illumination level verification . 50
11 Fire protection . 50
11.1 General . 50
11.2 Foreseeable misuses . 51
11.3 Fire risk assessment . 51
11.4 Fire hazards . 51
11.5 Risk reduction . 52
11.5.1 General . 52
11.5.2 Inherently safe design measures . 52
11.5.3 Safeguarding . 52
11.5.4 Monitoring and warning system . 53
11.5.5 Complementary protective measures . 53
11.6 Information for use . 54
12 Emergency, escape and evacuation. 54
12.1 General requirements . 54
12.1.1 General . 54
12.1.2 Evacuation and escape .
...