International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 61400-4:2013
Title Wind turbines - Part 4: Design requirements for wind turbine gearboxes
Project Number 23269
Abstract/Scope IEC 61400-4:2012(E) is applicable to enclosed speed increasing gearboxes for horizontal axis wind turbine drivetrains with a power rating in excess of 500 kW. This standard applies to wind turbines installed onshore or offshore. It Standard provides guidance on the analysis of the wind turbine loads in relation to the design of the gear and gearbox elements. The gearing elements covered by this standard include such gears as spur, helical or double helical and their combinations in parallel and epicyclic arrangements in the main power path. The standard is based on gearbox designs using rolling element bearings. Also included is guidance on the engineering of shafts, shaft hub interfaces, bearings and the gear case structure in the development of a fully integrated design that meets the rigours of the operating conditions. Lubrication of the transmission is covered along with prototype and production testing. Finally, guidance is provided on the operation and maintenance of the gearbox.


Current Stage code 6060
Current Stage code date 2013-03-22
Current Stage code deadline 2013-10-08
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 88
Reference Document IEC 61400-4:2012 (EQV)
ICS 27.180 - Wind turbine systems and other alternative sources of energy
Keywords Wind; Turbines; Design; Gearboxes
Note 2013-01-29: Publication allocated to
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2013-03-22 2013-10-08 export to doc file  EN  FR  DE
5099 2013-01-08 2013-02-05  
5060 2012-11-12 2012-12-03 export to doc file  EN
5020 2012-09-07 2012-11-09  
3090 2012-09-04 2012-09-07  
5060 2011-05-23 2011-06-13 export to doc file  EN
5020 2010-12-17 2011-05-20  
1090 2010-12-14 2010-12-17  

Implementation Dates

date of Ratification (DOR) (1) 2013-01-08
date of Availability (DAV) (2) 2013-03-22
date of Announcement (DOA) (3) 2013-04-08
date of Publication (DOP) (4) 2013-10-08
date of Withdrawal (DOW) (5) 2016-01-08


Superseded by  
Normative reference (6) ISO 76
ISO 281:2007
ISO 683 series
ISO 1328-1
ISO 4287
ISO 4288
ISO 4406
ISO 5725-2
ISO 6336 series
ISO 6336-2:2006
ISO 6336-3:2006
ISO 6336-5:2003
ISO 6336-6:2006
ISO/TR 10064-3
ISO 12925-1
ISO/TR 13593
ISO/TR 13989-1
ISO/TR 13989-2
ISO 14104
ISO 14635-1:2000
ISO 15243:2004
ISO/TS 16281:2008
IEC 60050 series
EN 61400-1:2005
EN 61400-3
IEC/TS 61400-13:2001
EN 61400-22:2011

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.