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



Reference EN 60726:2003
Title Dry-type power transformers
Project Number 14848
Abstract/Scope Specifies requirements for dry-type power transformers (including auto-transformers) having values of highest voltage for equipment up to and including 36 kV. The following small and special dry-type transformers are not covered by this standard: -instrument transformers (covered by EN 60185 and 60186); -transformers for static convertors (covered by EN 60084, 60119 and 60146). Where IEC standards do not exist for other special transformers, this standard may be applicable as a whole or in part.


Current Stage code 6060
Current Stage code date 2003-01-24
Current Stage code deadline 2003-11-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 14
Reference Document IEC 60726:1982 (MOD) + A1:1986 (MOD)
ICS 29.180 - Transformers. Reactors
Keywords Transformer; Power transformer; Dry-type
Note Supersedes HD 464 S1:1988 + A2:1991 + A3:1992 + A4:1995 + A5:2002 * Superseded by EN 60076-11:2004
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2003-01-24 2003-11-01 export to doc file  EN
5099 2002-11-01 2003-03-01  
5061 2002-09-25 2002-11-01  
5020 2002-05-03 2002-08-30  
1090 2001-10-25 2002-04-25  

Implementation Dates

date of Ratification (DOR) (1) 2002-11-01
date of Availability (DAV) (2) 2003-01-24
date of Announcement (DOA) (3) 2003-05-01
date of Publication (DOP) (4) 2003-11-01
date of Withdrawal (DOW) (5) dor + 36 months


Supersedes HD 464 S1:1988
HD 464 S1:1988/A2:1991
HD 464 S1:1988/A3:1992
HD 464 S1:1988/A4:1995
HD 464 S1:1988/A5:2002
Superseded by EN 60076-11:2004
Normative reference (6) IEC 60050-0:1979
EN 60071-1:1995
EN 60071-2:1997
HD 540.3 S1:1991
EN 60076-1:1997
EN 60076-2:1997
EN 60076-3:2001
HD 398.4 S1:1980
EN 60076-5:2000
HD 566 S1:1990
IEC 60119:1960
IEC 60146:1973
HD 553 S2:1993
HD 554 S1:1992
EN 60270:2001
EN 60529:1991
corr. May 1993
EN 60551:1992

(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.