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



Reference EN 61558-2-12:2001
Title Safety of power transformers, power supply units and similar devices - Part 2-12: Particular requirements for constant voltage transformers
Project Number 13092
Abstract/Scope This part 2 of EN 61558 is intended to be used in conjunction with EN 61558-1. This international standard deals with all aspects of safety such as electrical, thermal and mechanical. This part of EN 61558 applies to stationary or portable, single-phase or polyphase, air-cooled (natural or forced), associated or independent: - constant voltage auto-transformers; - constant voltage separating transformers; - constant voltage isolating transformers; - constant voltage safety isolating transformers; having a rated supply voltage not exceeding 1 000 V a.c., a rated frequency not exceeding 500 Hz, an internal operational frequency not exceeding 30 kHz and no limitation of the rated output. It has the status of a group safety publication in accordance with IEC Guide 104


Current Stage code 6060
Current Stage code date 2001-10-12
Current Stage code deadline 2002-06-01
Deadline date for vote  


Directive(s) LVD (2006/95/EC)
Order Voucher  


IEC Technical Body IEC/TC 96
Reference Document IEC 61558-2-12:2001 (EQV)
ICS 29.180 - Transformers. Reactors
Keywords Transformer; Power transformer; Power supply unit; Voltage transformer
Note EN following parallel vote * D114/118: CLC/TC 96 disbanded
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2001-10-12 2002-06-01 export to doc file  EN
5099 2001-09-01 2002-01-01  
5061 2001-06-26 2001-09-01  
5020 2001-03-16 2001-05-18  
4099 2001-03-12 2001-03-16  
3099 1999-03-18 1999-08-18  
4020 1999-03-12 1999-08-16  

Implementation Dates

date of Ratification (DOR) (1) 2001-09-01
date of Availability (DAV) (2) 2001-10-12
date of Announcement (DOA) (3) 2001-12-01
date of Publication (DOP) (4) 2002-06-01
date of Withdrawal (DOW) (5) 2004-09-01


Superseded by EN 61558-2-12:2011
Normative reference (6)  

(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.