Insulating liquids - Determination of acidity - Part 2: Colourimetric titration

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.

Isolierflüssigkeiten - Bestimmung des Säuregehaltes - Teil 2: Kolorimetrische Titration

Liquides isolants - Détermination de l’acidité - Partie 2: Titrage colorimétrique

Décrit une procédure pour la détermination de l'acidité des huiles isolantes minérales électriques neuves et usagées. La méthode peut être utilisée pour indiquer des modifications relatives qui se produisent dans une huile minérale isolante pendant l'utilisation dans des conditions d'oxydation qui peuvent être ou peuvent ne pas être révélées par d'autres propriétés de l'huile minérale résultante. L'acidité peut être utilisée dans le contrôle de la qualité des huiles minérales neuves. Comme divers produits d'oxydation présents dans l'huile minérale usagée contribuent à l'acidité et comme ces produits varient largement du point de vue de leurs propriétés de corrosion, l'essai ne peut pas être utilisé pour prévoir la corrosivité d'une huile minérale dans des conditions de service.

Izolacijske tekočine – Ugotavljanje kislosti – 2. del: kolorimetrična titracija (IEC 62021-2:2007)

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SIST EN 62021-2:2007

Insulating liquids - Determination of acidity -- Part 2: Colourimetric titration (IEC 62021-
Isolierflüssigkeiten - Bestimmung des Säuregehaltes -- Teil 2: Kolorimetrische Titration
(IEC 62021-2:2007)
Liquides isolants - Détermination de l’acidité -- Partie 2: Titrage colorimétrique (IEC
Ta slovenski standard je istoveten z: EN 62021-2:2007
29.040.10 Izolacijska olja Insulating oils
SIST EN 62021-2:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EN 62021-2

July 2007

ICS 29.040.10

English version

Insulating liquids -
Determination of acidity -
Part 2: Colourimetric titration
(IEC 62021-2:2007)

Liquides isolants -  Isolierflüssigkeiten -
Détermination de l’acidité - Bestimmung des Säuregehaltes -
Partie 2: Titrage colorimétrique Teil 2: Kolorimetrische Titration
(CEI 62021-2:2007) (IEC 62021-2:2007)

This European Standard was approved by CENELEC on 2007-07-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62021-2:2007 E

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EN 62021-2:2007 - 2 -
The text of document 10/692/FDIS, future edition 1 of IEC 62021-2, prepared by IEC TC 10, Fluids for
electrotechnical applications, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 62021-2 on 2007-07-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-07-01
Annex ZA has been added by CENELEC.
Endorsement notice
The text of the International Standard IEC 62021-2:2007 was approved by CENELEC as a European
Standard without any modification.

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- 3 - EN 62021-2:2007

Annex ZA

Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

Publication Year Title EN/HD Year
IEC 60475 - Method of sampling liquid dielectrics -

1) 2)
IEC 60567 - Oil-filled electrical equipment - Sampling of EN 60567 2005
gases and of oil for analysis of free and
dissolved gases - Guidance

ISO 5725 Series Accuracy (trueness and precision) of - -
measurement methods and results

ISO 6619 - Petroleum products and lubricants - - -
Neutralization number - Potentiometric
titration method

Undated reference.
Valid edition at date of issue.

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First edition

Première édition

Insulating liquids –
Determination of acidity
Part 2:

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