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



Reference EN 60027-3:2007
Title Letter symbols to be used in electrical technology - Part 3: Logarithmic and related quantities, and their units
Project Number 20777
Abstract/Scope Applies to logarithmic quantities and units. Quantities that can be expressed as the logarithm of a dimensionless quantity, such as the ratio of two physical quantities of the same kind, can be regarded and treated in different ways. In many cases, differences do not affect practical treatment.


Current Stage code 6060
Current Stage code date 2007-01-05
Current Stage code deadline 2007-12-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 25
Reference Document IEC 60027-3:2002 (EQV)
ICS 01.060 - Quantities and units
01.075 - Character symbols
Keywords Letter; Symbol; Logarithmic quantity
Note Supersedes HD 60027-3:2004
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2007-01-05 2007-12-01 export to doc file  EN  FR  DE
5099 2006-12-01 2007-04-01  
5061 2006-10-26 2006-12-01  
5060 2006-09-19 2006-10-02 export to doc file  EN
5020 2006-07-14 2006-09-15 export to doc file  EN
1090 2005-12-06 2006-06-06  

Implementation Dates

date of Ratification (DOR) (1) 2006-12-01
date of Availability (DAV) (2) 2007-01-05
date of Announcement (DOA) (3) 2007-06-01
date of Publication (DOP) (4) 2007-12-01
date of Withdrawal (DOW) (5) -


Superseded by  
Normative reference (6) ISO 31-0:1992
ISO 31-2:1992
ISO 31-7:1992
ISO 31-11:1992
ISO/IEC 2382-16:1996
HD 60027-2:2003

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of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn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