EN 50308:2004

SLOVENSKI SIST EN 50308:2004
STANDARD
september 2004
Vetrne turbine – Zaščitni ukrepi – Zahteve za načrtovanje, delovanje in
vzdrževanje
Wind turbines - Protective measures - Requirements for design, operation and
maintenance
ICS 27.180 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 50308
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2004
ICS 27.180
English version
Wind turbines –
Protective measures –
Requirements for design, operation and maintenance

Aérogénérateurs –  Windenergieanlagen –
Mesures de protection – Schutzmaßnahmen –
Exigences pour la conception, Anforderungen für Konstruktion,
le fonctionnement et la maintenance Betrieb und Wartung

This European Standard was approved by CENELEC on 2004-03-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50308:2004 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 88, Wind turbine
systems. This standard concerning protective measures stands in conjunction with the set of European
standards for wind turbines (EN 61400 series).
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50308 on
2004-03-01.
The following dates were fixed:
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-03-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-03-01
This European Standard was prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and supports the essential requirements of
Directive 98/37/EC
NOTE Revision of this standard will be undertaken as soon as possible.
__________
– 3 – EN 50308:2004
Contents
Introduction.4
1 Scope.5
2 Normative references.5
3 Definitions - Terminology .6
4 Safety requirements and protective measures .7
4.1 General requirements .7
4.2 Passages .7
4.3 Rooms / working areas .9
4.4 Floors, platforms, standing-, working places.9
4.5 Climbing facilities .10
4.6 Moving parts, guards and blocking devices .13
4.7 Lighting .13
4.8 Noise.14
4.9 Emergency stop.15
4.10 Power disconnection.15
4.11 Fire protection .16
4.12 Warning signs .16
4.13 Offshore installation.16
4.14 Requirements for manuals and warnings.17
4.15 Requirements for operation and maintenance (Information for use) .19

Annex A (informative) National informative annexes .21
A.0 Introduction.21
A.1 Germany (DE).21
A.2 Denmark (DK).22
A.3 Spain (ES) .22
A.4 France (FR) .23
A.5 United Kingdom (GB) .24
A.6 Greece (GR) .24
A.7 Ireland (IE).24
A.8 Italy (IT) .24
A.9 The Netherlands (NL).25

Introduction
This European Standard has been prepared as a harmonised standard to provide a means of conforming
to the essential safety requirements of the Machinery Directive and associated EFTA regulations. For the
determination of the hazards described in this standard EN 1050 should be applied.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered
is indicated in Clause 1 (Scope).
This standard is a product (family) standard (according to EN 292-1) giving common requirements for the
wind turbines mentioned in Clause 1 (Scope).
The document contains a standard part and an informative annex.
Annex A consists of national normative documents and/or regulations that specify either the present
safety requirements for personnel or give the national supplements to these minimum requirements at the
time this standard was prepared (January 2000).
The format of the standard is based, where possible, on a practical approach for
– manufacturers and designers who have to meet the requirements,
– authorities who have to check the design,
– owners who have legal responsibilities.

– 5 – EN 50308:2004
1 Scope
This European Standard specifies requirements for protective measures relating to the health and safety
of personnel, relevant to commissioning, operation and maintenance of wind turbines.
It does not describe instructions and provisions for safe working during manufacture, transport, assembly
and installation of the wind turbine.
Requirements are specified regarding
– hardware provisions being a part of the turbine such as platforms, ladders, lighting,
– manuals and warning signs to accommodate safe and quick operation, inspection and maintenance.
The requirements and/or measures specified account for the hazards
– of mechanical origin such as falling, slipping, locking in,
– of thermal origin (fire) such as burns by flames or explosions,
– of electricity such as contact with live parts,
– generated by noise such as stress and loss of hearing,
– generated by neglecting ergonomic principles in machine design such as unhealthy postures or human
errors.
This standard is prepared for horizontal axis, grid connected wind turbines. For other concepts (e.g.
vertical axis turbines) the principles are still valid, but the specific rules or requirements have to be
adjusted to the actual concept.
Additional provisions and procedures are necessary for turbines installed in water or offshore. The present
document only draws attention to these.
Provisions and procedures for lifts and Suspended Access Equipment (SAE) in the turbine tower are not
included in this standard.
This standard is not applicable to wind turbines manufactured before the date of its publication by
CENELEC.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 292-1 Safety of machinery - Basic concepts, general principles for design
Part 1: Basic terminology, methodology
EN 292-2 1991 Part 2: Technical principles and specifications
EN 418 Safety of machinery - Emergency stop equipment, functional aspects
Principles for design
EN 457 1992 Safety of machinery - Auditory danger signals
General requirements, design and testing (ISO 7731:1986, mod.)
EN 547-1 Safety of machinery - Human body dimensions
Part 1: Principles for determining the dimensions required for openings for
whole body access into machinery

EN 547-3 Safety of machinery - Human body dimensions
Part 3: Anthropometric data for whole body access into machinery and access
openings
EN 563 Safety of machinery – Temperatures of touchable surfaces
Ergonomics data to establish temperature limit values for hot surfaces
EN 795 Personal protective equipment against falls from a height
Anchorage devices - Requirements and testing
EN 953 Safety of machinery – Guards – General requirements for the design and
construction of fixed and movable guards
EN 981 Safety of machinery – System of auditory and visual danger information
signals
EN 982 Safety of machinery - Safety requirements for hydraulic and pneumatic
systems and parts - Hydraulics
EN 983 Safety of machinery - Safety requirements for hydraulic and pneumatic
systems and parts - Pneumatics
EN 1037 Safety of machinery – Prevention of unexpected start up
EN 1050 Safety of machinery – Principles for risk assessment
ISO 4871 1996 Acoustics – Determination of sound power levels of noise sources using
sound pressure – Engineering method in an essentially free field over a
reflecting plane
EN ISO 11202 1995 Acoustics – Noise emitted by machinery and equipment – Measurement of
emission sound pressure levels at a work station and at other specified
positions – Survey method in situ

Acoustics – Recommended practice for the design of low-noise machinery
EN ISO 11688-1 1998
and equipment - Part 1: Planning
1)
EN ISO 14122-1 Safety of machinery
Part 1: Permanent means of access to machines and industrial plants -
Choice of a fixed means of access between two levels
1)
EN ISO 14122-2 Part 2: Working platforms and gangways
1)
EN ISO 14122-3 Part 3: Stairways, stepladders and guard-rails
1)
EN ISO 14122-4 Part 4: Fixed ladders
EN 50160 Voltage characteristics of electricity supplied by public distribution systems
EN 50172 Emergency escape lighting systems

EN 50199 Electromagnetic compatibility (EMC) - Product standard for arc welding
equipment
ENV 1070 Safety of machinery – Terminology
ENV 61400-1 Wind turbine generating systems - Part 1: Safety requirements
EN 61400-11 1998 Wind turbine generator systems – Part 11: Acoustic noise measurement
techniques (IEC 61400-11:1998)
HD 472 Nominal voltages for low-voltage public electricity supply systems
(IEC 60038, mod.)
3 Definitions – Terminology
For the purpose of this standard the definitions given in EN 292, ENV 61400-1 and EN ISO 4871 apply.

1)
At draft stage.
– 7 – EN 50308:2004
4 Safety requirements and protective measures
4.1 General requirements
Wind turbines shall be designed according the principles of EN 292. The general principles to avoid risks
to health and safety are laid down in Clause 5 of EN 292-1 (Strategy for selecting safety measures).
The initial design of wind turbines must take account of how risks to the health and safety of persons are
to be minimised. Structural provisions include e.g. door-openings, access-openings, floors, platforms and
railings, ladders with fall protection equipment, passages and working spaces, anchorage points and hand
grips, lighting, guarding of moving parts, protection against electrical hazards, sound barriers, noise
isolation or thermal isolation. Some of these provisions have an effect on the structural integrity of the
turbine e.g. door openings, doorstep height, access openings.
The design shall include provisions for permanent safe access (ladders, platforms, anchorage points,
lighting, etc.) to reach the locations for inspection and maintenance activities and to perform these
ac
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