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



Reference EN 61148:2012
Title Terminal markings for valve device stacks and assemblies and for power conversion equipment
Project Number 22954
Abstract/Scope IEC 61148:2011 is applicable to the terminal markings for the main circuits of valve device stacks and assemblies, and of integrated conversion equipment. The terminal markings refer to stacks, assemblies and equipment comprising semiconductor valve devices. The object of this standard is to specify a logical alphanumeric marking system for the identification of the external main terminals of the main power circuits in a stack, valve device assembly or integrated conversion equipment, which is applicable for the purpose of reference in circuit diagrams, catalogues, descriptions, and information exchange and storage. In the case of stacks and assemblies, alphanumeric terminal marking systems are indicated for those converter connections which are the most important and most commonly used ones. Terminal marking systems making use of graphic symbols or identifying colours are not considered in this standard. This second edition includes the following significant technical changes with respect to the previous edition: - the whole document has been rewritten according to the current Directives; - the identification codes were deleted according to the withdrawal of IEC 60971; - examples of terminal marking were added, especially for self-commutated converters.


Current Stage code 6060
Current Stage code date 2012-01-06
Current Stage code deadline 2012-08-24
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 22
Reference Document IEC 61148:2011 (EQV)
ICS 29.200 - Rectifiers. Convertors. Stabilized power supply
Keywords Terminal; Marking; Valve; Power converter; Converter
Note 2011-10-28: Publication editing allocated to
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2012-01-06 2012-08-24 export to doc file  EN  FR  DE
5099 2011-11-24 2011-12-22  
5060 2011-09-12 2011-10-03 export to doc file  EN
5020 2011-07-08 2011-09-09  
3090 2010-10-29 2010-12-15  
5060 2010-09-27 2010-10-11 export to doc file  EN
5020 2010-04-23 2010-09-24  
1090 2010-04-20 2010-04-23  

Implementation Dates

date of Ratification (DOR) (1) 2011-11-24
date of Availability (DAV) (2) 2012-01-06
date of Announcement (DOA) (3) 2012-02-24
date of Publication (DOP) (4) 2012-08-24
date of Withdrawal (DOW) (5) 2014-11-24


Superseded by  
Normative reference (6) IEC 60050-551
EN 60146-1-1

(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.