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



Reference EN 61378-1:2011
Title Convertor transformers - Part 1: Transformers for industrial applications
Project Number 22426
Abstract/Scope IEC 61378-1:2011(E) deals with the specification, design and testing of power transformers and reactors which are intended for integration within semiconductor converter plants. The scope of this International Standard is limited to application of power converters of any power rating. Typical applications are: thyristor rectifiers for electrolysis; diode rectifiers for electrolysis; thyristor rectifiers for large drives; thyristor rectifiers for scrap melting furnaces, and diode rectifiers feeding inverters for variable speed drives. The standard also covers the regulating unit utilized in such application as step down regulating transformers or autotransformers. This edition includes the following significant technical changes with respect to the previous edition: - addition of winding connections with phase displacement (30°); - addition of transformers with more than one active part in the same tank; - change of reference power definition; - addition of regulating transformer feeding converter transformer; - addition of considerations about current sharing and hot spot temperature in high current windings for various winding arrangements; - addition of transductors used for d.c. voltage regulation together with diode rectifiers. The contents of the corrigendum of January 2012 have been included in this copy.


Current Stage code 6060
Current Stage code date 2011-11-11
Current Stage code deadline 2012-05-30
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 14
Reference Document IEC 61378-1:2011 (EQV) + corrigendum Jan. 2012 (EQV)
ICS 29.180 - Transformers. Reactors
Keywords Convertor; Transformer; Industrial
Note 2011-07-28: Publication allocated to Supersedes EN 61378-1:1998
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2011-11-11 2012-05-30 export to doc file  EN  FR  DE
5099 2011-08-30 2011-09-27  
5060 2011-06-27 2011-07-18 export to doc file  EN
5020 2011-04-22 2011-06-24  
3090 2009-10-23 2010-07-31  
5060 2009-10-14 2009-10-28 export to doc file  EN
5020 2009-05-08 2009-10-09  
1090 2009-05-05 2009-05-08  

Implementation Dates

date of Ratification (DOR) (1) 2011-08-30
date of Availability (DAV) (2) 2011-11-11
date of Announcement (DOA) (3) 2011-11-30
date of Publication (DOP) (4) 2012-05-30
date of Withdrawal (DOW) (5) 2014-08-30


Supersedes EN 61378-1:1998
EN 61378-1:1998/corrigendum Nov. 1998
Superseded by  
Normative reference (6) IEC 60050-421:1990
EN 60076-1:2011
EN 60076-2:2011
EN 60076-3:2001
EN 60076-6:2008
IEC 60076-8:1997
EN 60076-11:2004
EN 60146-1-1:2010
IEC/TR 60146-1-2:2011
IEC/TR 60616:1978

(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.