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



Reference EN 60027-4:2007
Title Letter symbols to be used in electrical technology - Part 4: Rotating electrical machines
Project Number 17103
Abstract/Scope This part of IEC 60027 is applicable to rotating electric machines. It gives names and symbols for quantities and units.


Current Stage code 6060
Current Stage code date 2007-10-11
Current Stage code deadline 2008-07-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 25
Reference Document IEC 60027-4:2006 (EQV)
ICS 01.060 - Quantities and units
Keywords Letter; Symbol; Rotatin machine
Note Supersedes HD 245.4 S1:1987
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2007-10-11 2008-07-01 export to doc file  EN  FR  DE
5099 2007-10-01 2007-12-01  
5061 2007-08-28 2007-10-01  
5060 2006-11-07 2006-11-20 export to doc file  EN
5020 2006-09-01 2006-11-03  
4099 2006-08-04 2006-08-25  
5060 2006-03-20 2006-04-03 export to doc file  EN
5020 2005-10-14 2006-03-17  
1090 2005-10-11 2005-10-14  

Implementation Dates

date of Ratification (DOR) (1) 2007-10-01
date of Availability (DAV) (2) 2007-10-11
date of Announcement (DOA) (3) 2008-01-01
date of Publication (DOP) (4) 2008-07-01
date of Withdrawal (DOW) (5) 2010-10-01


Supersedes HD 245.4 S1:1987
Superseded by  
Normative reference (6) IEC 60027-1:1992
EN 60034-1:2004
EN 60034-2:1996
EN 60034-4:1995
EN 60034-9:2005
EN 60034-12:2002
CLC/TS 60034-17:2004
CLC/TS 60034-20-1:2004
EN 60034-26:2006
IEC 60050-101:1998
IEC 60050-111:1996
IEC 60050-121:1998
IEC 60050-131:2002
IEC 60050-151:2001
IEC 60050-411:1996
EN 61986:2002

(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.