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Reference EN 60742:1995
Title Isolating transformers and safety isolating transformers - Requirements
Project Number 2898
Abstract/Scope Applies to stationary or portable, single-phase or polyphase, air-cooled isolating and safety isolating transformers, associated or otherwise, having a rated supply voltage not exceeding 1000 V alternating current and 1000 V unsmoothed direct current and rated frequency not exceeding 500 Hz. Has the status of a group safety publication in accordance with IEC Guide 104.


Current Stage code 6060
Current Stage code date 1995-06-13
Current Stage code deadline 1995-10-15
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 14
Reference Document IEC 60742:1983 (MOD) + A1:1992 (MOD)
ICS 29.180 - Transformers. Reactors
Keywords Transformer; Isolating transformer; Safety
Note Superseded by EN 61558 series * Issued by BTTF 64-1 superseded by TC 96 disbanded by 114 BT
Special National Condition(s) DK, FI, FR, GB, SE


Categories - Aspects
Product Life Cycle


Deadline Date
6060 1995-06-13 1995-10-15 export to doc file  EN
5099 1994-12-06 1995-01-06  
5062 1994-10-14 1995-01-14  
5020 1994-05-18 1994-09-01  
3090 1993-12-08 1994-06-08  
5091 1992-12-09 1993-07-06  
5020 1992-01-28 1992-09-01  
1090 1991-12-10 1992-06-10  
5020 1988-01-12 1988-03-15  
1090 1987-12-03 1988-01-15  

Implementation Dates

date of Ratification (DOR) (1) 1994-12-06
date of Availability (DAV) (2) 1995-06-13
date of Announcement (DOA) (3) 1995-01-15
date of Publication (DOP) (4) 1995-10-15
date of Withdrawal (DOW) (5) 1995-10-15


(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Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn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.