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



Reference EN 62021-2:2007
Title Insulating liquids - Determination of acidity - Part 2: Colourimetric titration
Project Number 20684
Abstract/Scope Describes a procedure for determination of the acidity of unused and used electrical mineral insulating oils. The method may be used to indicate relative changes that occur in a mineral insulating oil during use under oxidizing conditions that may or may not be shown by other properties of the resulting mineral oil. The acidity can be used in the quality control of unused mineral oil. As a variety of oxidation products present in used mineral oil contribute to acidity and these products vary widely in their corrosion properties, the test cannot be used to predict corrosiveness of a mineral oil under service conditions.


Current Stage code 6060
Current Stage code date 2007-07-26
Current Stage code deadline 2008-04-01
Deadline date for vote  


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IEC Technical Body IEC/TC 10
Reference Document IEC 62021-2:2007 (EQV)
ICS 29.040.10 - Insulating oils
Keywords Insulation; Liquid; Acidity; Titration; Colourimetric
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2007-07-26 2008-04-01 export to doc file  EN  FR  DE
5099 2007-07-01 2007-09-01  
5061 2007-05-23 2007-07-01  
5060 2007-04-23 2007-05-07 export to doc file  EN
5020 2007-02-16 2007-04-20  
3090 2006-12-22 2007-01-31  
5060 2006-10-23 2006-11-06 export to doc file  EN
5020 2006-05-19 2006-10-20  
1090 2006-05-16 2006-05-19  

Implementation Dates

date of Ratification (DOR) (1) 2007-07-01
date of Availability (DAV) (2) 2007-07-26
date of Announcement (DOA) (3) 2007-10-01
date of Publication (DOP) (4) 2008-04-01
date of Withdrawal (DOW) (5) 2010-07-01


Superseded by  
Normative reference (6) ISO 5725-1:1994
ISO 6619:1988
IEC 60475:1974
EN 60567:2005

(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.