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



Reference EN 50464-3:2007
Title Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2 500 kVA with highest voltage for equipment not exceeding 36 kV - Part 3: Determination of the power rating of a transformer loaded with non-sinusoidal currents
Project Number 20582
Abstract/Scope This European Standard gives to the user guidance to determine the loadability of an oil-immersed distribution transformer, as defined in and covered by EN 50464-1, in the case of load current with harmonic factors exceeding the maximum values allowed. NOTE In general this document is also applicable to dry-type distribution transformers as defined in and covered by HD 538.


Current Stage code 6060
Current Stage code date 2007-04-20
Current Stage code deadline 2008-02-01
Deadline date for vote 2006-03-15


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IEC Technical Body IEC/TC 14
Reference Document  
ICS 29.180 - Transformers. Reactors
Keywords Transformer; Distribution transformer; Oil immersed; Highest voltage; Three-phase
Note Supersedes HD 428.4 S1:1994 (PR=211) * No dow (conversion) * Will be later superseded by future prEN 50588-3
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2007-04-20 2008-02-01 export to doc file  EN  FR  DE
5099 2007-02-01 2007-06-01  
5061 2006-11-28 2007-02-01  
5060 2006-11-20 2006-12-04 export to doc file  EN
5020 2006-09-15 2006-11-17 export to doc file  EN
3090 2006-06-15 2006-10-08  
2020 2006-01-26 2006-03-15  

Implementation Dates

date of Ratification (DOR) (1) 2007-02-01
date of Availability (DAV) (2) 2007-04-20
date of Announcement (DOA) (3) 2007-08-01
date of Publication (DOP) (4) 2008-02-01
date of Withdrawal (DOW) (5) -


Superseded by  
Normative reference (6) EN 50216-1:2002
EN 50464-2-1:2007
EN 60076-1:1997

(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.