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



Reference EN 61099:2010
Title Insulating liquids - Specifications for unused synthetic organic esters for electrical purposes
Project Number 22650
Abstract/Scope IEC 61099:2010 covers the specification and test methods for unused synthetic organic esters. It applies to synthetic organic esters, delivered to the agreed point and time of delivery intended, for use in transformers, switchgear and similar related equipment in which synthetic organic esters are required as an insulant and for heat transfer. The main changes of this new edition with respect to the previous one relate to the aim of giving a more updated specification of synthetic organic esters when used as insulating liquids.


Current Stage code 6060
Current Stage code date 2010-11-12
Current Stage code deadline 2011-08-01
Deadline date for vote  


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IEC Technical Body IEC/TC 10
Reference Document IEC 61099:2010 (EQV)
ICS 29.040 - Insulating fluids
Keywords Ester; Unused; Synthetic; Organic
Note Supersedes EN 61099:1992
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2010-11-12 2011-08-01 export to doc file  EN  FR  DE
5099 2010-11-01 2011-01-01  
5061 2010-09-30 2010-11-01  
5060 2010-08-09 2010-08-23 export to doc file  EN
5020 2010-06-04 2010-08-06  
3090 2010-04-09 2010-05-31  
5060 2010-02-22 2010-03-08 export to doc file  EN
5020 2009-09-18 2010-02-19  
1090 2009-09-15 2009-09-18  

Implementation Dates

date of Ratification (DOR) (1) 2010-11-01
date of Availability (DAV) (2) 2010-11-12
date of Announcement (DOA) (3) 2011-02-01
date of Publication (DOP) (4) 2011-08-01
date of Withdrawal (DOW) (5) 2013-11-01


Supersedes EN 61099:1992
Superseded by  
Normative reference (6) OECD 301
ISO 2211:1973
ISO 2592:2000
ISO 2719:2002
ISO 3016:1994
ISO 3104:1994
ISO 3675:1998
ISO 12185:1996
EN 60156:1995
EN 60247:2004
IEC 60475:1974
HD 488 S1
EN 60814:1997
EN 61039:2008
EN 61125
EN 61620:1999
EN 62021-1:2003
EN 62021-2:2007

(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.