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


Transformers, reactors, power supply units, and combinations thereof



Reference EN 61558-2-20:2000
Title Safety of power transformers, power supply units and similar devices - Part 2-20: Particular requirements for small reactors
Project Number 12179
Abstract/Scope This part of EN 61558 applies to stationary or portable, single-phase or poly-phase, air-cooled (natural or forced) general purpose small reactors, including alternating current, premagnetised and current compensated reactors, independent or associated, having a rated supply voltage not exceeding 1000 V a.c. or d.c. and rated frequency not exceeding 1 MHz, the rated power not exceeding - 2 kVAR a.c. (2 kW d.c.) for single-phase reactors; - 10 kVAR a.c. (10 kW d.c.) for poly-phase reactors. This part 2-20 is intended to be used in conjunction with EN 61558-1. It has the status of a group safety publication in accordance with IEC Guide 104.


Current Stage code 6060
Current Stage code date 2000-11-27
Current Stage code deadline 2001-05-01
Deadline date for vote  


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


IEC Technical Body IEC/TC 96
Reference Document IEC 61558-2-20:2000 (EQV)
ICS 29.180 - Transformers. Reactors
Keywords Transformer; Power transformer; Power supply unit; Reactor; Safety
Note EN following parallel vote * D114/118: CLC/TC 96 disbanded
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2000-11-27 2001-05-01 export to doc file  EN
5099 2000-08-01 2000-11-01  
5062 2000-05-25 2000-08-01  
5020 2000-02-11 2000-05-01  
4099 2000-02-07 2000-02-11  
4020 1998-05-22 1998-11-02  
3099 1998-05-18 1998-05-22  

Implementation Dates

date of Ratification (DOR) (1) 2000-08-01
date of Availability (DAV) (2) 2000-11-27
date of Announcement (DOA) (3) 2000-11-01
date of Publication (DOP) (4) 2001-05-01
date of Withdrawal (DOW) (5) 2003-08-01


Superseded by EN 61558-2-20:2011
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.