EN 61099:2010

SLOVENSKI STANDARD
01-januar-2011
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Insulating liquids - Specifications for unused synthetic organic esters for electrical
purposes (IEC 61099:2010)
Isolierflüssigkeiten - Anforderungen an neue synthetische organische Ester für
elektrotechnische Zwecke (IEC 61099:2010)
Liquides isolants - Spécifications relatives aux esters organiques de synthèse neufs
destinés aux matériels électriques (CEI 61099:2010)
Ta slovenski standard je istoveten z: EN 61099:2010
ICS:
29.040.01 Izolacijski fluidi na splošno Insulating fluids in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61099
NORME EUROPÉENNE
November 2010
EUROPÄISCHE NORM
ICS 29.040 Supersedes EN 61099:1992

English version
Insulating liquids -
Specifications for unused synthetic organic esters for electrical purposes
(IEC 61099:2010)
Liquides isolants -  Isolierflüssigkeiten -
Spécifications relatives aux esters Anforderungen an neue synthetische
organiques de synthèse neufs destinés organische Ester für elektrotechnische
aux matériels électriques Zwecke
(CEI 61099:2010) (IEC 61099:2010)

This European Standard was approved by CENELEC on 2010-11-01. 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, Croatia, 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.

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

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61099:2010 E
Foreword
The text of document 10/813/FDIS, future edition 2 of IEC 61099, prepared by IEC TC 10, Fluids for
electrotechnical applications, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 61099 on 2010-11-01.
This European Standard supersedes EN 61099:1992.
The main changes with respect to EN 61099:1992 relate to the aim of giving a more updated specification
of synthetic organic esters when used as insulating liquids.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
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) 2011-08-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-11-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61099:2010 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61203 NOTE  Harmonized as EN 61203.
__________
- 3 - EN 61099:2010
Annex ZA
(normative)
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
applies.
Publication Year Title EN/HD Year

IEC 60156 - Insulating liquids - Determination of the EN 60156 -
breakdown voltage at power frequency -
Test method
IEC 60247 - Insulating liquids - Measurement of relative EN 60247 -
permittivity, dielectric dissipation factor (tan d)
and d.c. resistivity
IEC 60475 - Method of sampling liquid dielectrics - -

IEC 60628 1985 Gassing of insulating liquids under electrical HD 488 S1 1987
stress and ionization
IEC 60814 - Insulating liquids - Oil-impregnated paper and EN 60814 -
pressboard - Determination of water by
automatic coulometric Karl Fischer titration

IEC 61039 - Classification of insulating liquids EN 61039 -

IEC 61125 1992 Unused hydrocarbon-based insulating liquids - EN 61125 1993
Test methods for evaluating the oxidation
stability
IEC 61620 - Insulating liquids - Determination of the EN 61620 -
dielectric dissipation factor by measurement of
the conductance and capacitance - Test method

IEC 62021-1 - Insulating liquids - Determination of acidity - EN 62021-1 -
Part 1: Automatic potentiometric titration

IEC 62021-2 - Insulating liquids - Determination of acidity - EN 62021-2 -
Part 2: Colourimetric titration

ISO 2211 - Liquid chemical products - Measurement of - -
colour in Hazen units (platinum-cobalt scale)

ISO 2592 - Determination of flash and fire points - EN ISO 2592 -
Cleveland open cup method
ISO 2719 - Determination of flash point - Pensky-Martens EN ISO 2719 -
closed cup method
ISO 3016 - Petroleum products - Determination of pour - -
point
ISO 3104 - Petroleum products - Transparent and opaque EN ISO 3104 -
liquids - Determination of kinematic viscosity and
calculation of dynamic viscosity

Publication Year Title EN/HD Year

ISO 3675 - Crude petroleum and liquid petroleum EN ISO 3675 -
products - Laboratory determination of density -
Hydrometermethod
ISO 12185 - Crude petrolelum and petroleum products - EN ISO 12185 -
Determination of density - Oscillating U-tube
method
OECD 301 1992 OECD guidelines for the testing of chemicals - - -
Ready Biodegradability
IEC 61099 ®
Edition 2.0 2010-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulating liquids – Specifications for unused synthetic organic esters for
electrical purposes
Liquides isolants – Spécifications relatives aux esters organiques de synthèse
neufs destinés aux matériels électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 29.040 ISBN 978-2-88912-160-1
– 2 – 61099 © IEC:2010
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms and definitions .7
4 General remarks.7
5 Health, safety and environment (HSE) properties (liquid properties related to safe
handling and environment protection) .8
5.1 Flash point and fire point .8
5.2 Biodegradation .8
5.3 Toxicity .8
6 Classification, identification, general delivery requirements, sampling, packaging
and disposal .8
6.1 Classification.8
6.2 Identification and general delivery requirements, sampling, packaging and
disposal.8
6.3 Storage .8
6.4 Representative sampling .9
6.5 Disposal and spillages.9
7 Properties of synthetic organic esters .9
7.1 Physical properties, significance and test methods.9
7.1.1 Colour .9
7.1.2 Appearance .9
7.1.3 Density .9
7.1.4 Kinematic viscosity .9
7.1.5 Flash point and fire point .9
7.1.6 Pour point.9
7.1.7 Crystallization.9
7.1.8 Water content .9
7.1.9 Acidity .9
7.1.10 Oxidation stability .10
8 Electrical properties.10
8.1 Breakdown voltage .10
8.2 Dielectric dissipation factor, permittivity and d.c. resistivity.10
8.3 Gassing tendency.10
9 Specifications for synthetic organic esters used in transformers .10
Annex A (informative) Determination of crystallization .12
Annex B (informative) Specifications for synthetic organic esters used in capacitors.13
Bibliography.14

61099 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSULATING LIQUIDS –
SPECIFICATIONS FOR UNUSED SYNTHETIC
ORGANIC ESTERS FOR ELECTRICAL PURPOSES

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the correspo
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