Insulating liquids - Determination of acidity - Part 1: Automatic potentiometric titration

Describes the procedure for the 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 regardless of the colour or 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. The acidity results obtained by this test method may or may not be numerically the same as those obtained by colorimetric methods, but they are generally of the same magnitude.

Isolierflüssigkeiten - Bestimmung des Säuregehaltes - Teil 1: Automatische potentiometrische Titration

Liquides isolants - Détermination de l'acidité - Partie 1: Titrage potentiométrique automatique

Décrit la 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 son utilisation par oxydation, indépendamment de la couleur ou d'autres propriétés de l'huile. 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. Les résultats d'acidité obtenus par cette méthode d'essai peuvent ou peuvent ne pas être numérique-ment les mêmes que ceux obtenus par des méthodes colorimétriques, mais ils sont généralement du même ordre de grandeur.

Insulating liquids - Determination of acidity - Part 1: Automatic potentiometric titration (IEC 62021- 1:2003)

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SLOVENSKI SIST EN 62021-1:2004

april 2004
Insulating liquids - Determination of acidity - Part 1: Automatic potentiometric
titration (IEC 62021- 1:2003)
ICS 29.040.10 Referenčna številka
SIST EN 62021-1:2004(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

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ICS 29.040.10; 29.180

English version

Insulating liquids -
Determination of acidity
Part 1: Automatic potentiometric titration
(IEC 62021-1:2003)

Liquides isolants -  Isolierflüssigkeiten -
Détermination de l'acidité Bestimmung des Säuregehaltes
Partie 1: Titrage potentiométrique Teil 1: Automatische potentiometrische
automatique Titration
(CEI 62021-1:2003) (IEC 62021-1:2003)

This European Standard was approved by CENELEC on 2003-09-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and 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

© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62021-1:2003 E

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EN 62021-1:2003 - 2 -

The text of document 10/559/FDIS, future edition 1 of IEC 62021-1, prepared by IEC TC 10, Fluids for
electrotechnical applications, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 62021-1 on 2003-09-01.

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) 2004-06-01

– latest date by which the national standards conflicting
 with the EN have to be withdrawn (dow) 2006-09-01

Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative.
Annex ZA has been added by CENELEC.

Endorsement notice

The text of the International Standard IEC 62021-1:2003 was approved by CENELEC as a European
Standard without any modification.

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- 3 - EN 62021-1:2003
Annex ZA

Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60475 - Method of sampling liquid dielectrics - -

Undated reference.

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Première édition
First edition
Liquides isolants –
Détermination de l'acidité –
Partie 1:
Titrage potentiométrique automatique
Insulating liquids –
Determination of acidity –
Part 1:
Automatic potentiometric titration
© IEC 2003 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electroni

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