EN IEC 63012:2019

SLOVENSKI STANDARD
01-november-2019
Izolacijske tekočine - Neuporabljeni modificirani ali mešani estri za uporabo v
elektrotehniki
Insulating liquids - Unused modified or blended esters for electrotechnical applications
Ta slovenski standard je istoveten z: EN IEC 63012:2019
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 IEC 63012

NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2019
ICS 29.040.10
English Version
Insulating liquids - Unused modified or blended esters for
electrotechnical applications
(IEC 63012:2019)
Isolants liquides - Esters neufs modifiés ou mélangés pour Isolierflüssigkeiten – Neue modifizierte oder verschnittene
applications électrotechniques Ester für elektrotechnische Anwendungen
(IEC 63012:2019) (IEC 63012:2019)
This European Standard was approved by CENELEC on 2019-06-13. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63012:2019 E
European foreword
The text of document 10/1078/FDIS, future edition 1 of IEC 63012, prepared by IEC/TC 10 "Fluids for
electrotechnical applications" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 63012:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-03-13
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-06-13
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 63012:2019 was approved by CENELEC as a European
Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60076-14 NOTE Harmonized as EN 60076-14
IEC 60296 NOTE Harmonized as EN 60296
IEC 60422 NOTE Harmonized as EN 60422
IEC 61039 NOTE Harmonized as EN 61039
IEC 61203 NOTE Harmonized as EN 61203
IEC 61868 NOTE Harmonized as EN 61868
IEC 62975 NOTE Harmonized as EN IEC 62975
ISO 3015 NOTE Harmonized as EN ISO 3015

Under preparation. Stage at the time of publication: prEN 62975.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60156 -  Insulating liquids - Determination of the breakdown - -
voltage at power frequency - Test method
IEC 60247 -  Insulating liquids - Measurement of relative permittivity, EN 60247 -
dielectric dissipation factor (tan δ) and d.c. resistivity
IEC 60628 -  Gassing of insulating liquids under electrical stress and HD 488 S1 -
ionization
IEC 60666 -  Detection and determination of specified additives in EN 60666 -
mineral insulating oils
IEC 60814 -  Insulating liquids - Oil-impregnated paper and pressboard EN 60814 -
- Determination of water by automatic coulometric Karl
Fischer titration
IEC 60897 -  Methods for the determination of the lightning breakdown - -
voltage of insulating liquids
IEC 61099 2010 Insulating liquids - Specifications for unused synthetic EN 61099 2010
organic esters for electrical purposes
IEC 61125 -  Insulating liquids - Test methods for oxidation stability - EN IEC 61125 -
Test method for evaluating the oxidation stability of
insulating liquids in the delivered state
IEC/TR 61294 -  Insulating liquids - Determination of the partial discharge - -
inception voltage (PDIV) - Test procedure
IEC 61619 -  Insulating liquids - Contamination by polychlorinated EN 61619 -
biphenyls (PCBs) - Method of determination by capillary
column gas chromatography
IEC 61620 -  Insulating liquids - Determination of the dielectric EN 61620 -
dissipation factor by measurement of the conductance
and capacitance - Test method
IEC 62021-3 -  Insulating liquids - Determination of acidity - Part 3: Test EN 62021-3 -
methods for non-mineral insulating oils
IEC 62535 -  Insulating liquids - Test method for detection of potentially EN 62535 -
corrosive sulphur in used and unused insulating oil
IEC 62697-1 -  Test methods for quantitative determination of corrosive EN 62697-1 -
sulfur compounds in unused and used insulating liquids -
Part 1: Test method for quantitative determination of
dibenzyldisulfide (DBDS)
IEC 62770 -  Fluids for electrotechnical applications - Unused natural EN 62770 -
esters for transformers and similar electrical equipment
IEC 62961 -  Insulating liquids - Test methods for the determination of EN IEC 62961 -
interfacial tension of insulating liquids - Determination
with the ring method
ISO 2049 -  Petroleum products - Determination of colour (ASTM - -
scale)
ISO 2211 -  Liquid chemical products - Measurement of colour in - -
Hazen units (platinum-cobalt scale)
ISO 2592 -  Petroleum products - Determination of flash and fire - -
points - Cleveland open cup method
ISO 2719 -  Determination of flash point - Pensky-Martens closed cup EN ISO 2719 -
method
ISO 3016 -  Petroleum products - Determination of pour point EN ISO 3016 -
ISO 3104 -  Petroleum products - Transparent and opaque liquids - EN ISO 3104 -
Determination of kinematic viscosity and calculation of
dynamic viscosity
ISO 3675 -  Crude petroleum and liquid petroleum products - EN ISO 3675 -
Laboratory determination of density - Hydrometer method
ISO 12185 -  Crude petroleum and petroleum products - Determination EN ISO-
of density - Oscillating U-tube method 12185
Surface active agents - Determination of interfacial EN 14210
tension of solutions of surface active agents by the stirrup
or ring method
ASTM D1275 -  Methods A and B: Standard test method for corrosive - -
sulfur in electrical insulating oils
ASTM D1903 -  Standard practice for determining the coefficient of -  -
thermal expansion of electrical insulating liquids of
petroleum origin, and askarels
ASTM D3300 - Standard test method for dielectric breakdown voltage of -  -
insulating oils ofpetroleum origin under impulse
conditions
ASTM D4172 -  Standard test method for wear preventive characteristics -  -
of lubricating fluid (four-ball method)
ASTM D7150 -  Standard test method for the determination of gassing - -
characteristics of insulating liquids under thermal stress
at low temperature
ASTM D7896 -  Standard test method for thermal conductivity, thermal -  -
diffusivity and volumetric heat capacity of engine coolants
and related fluids by transient hot wire liquid thermal
conductivity method
ASTM E1269 -  Standard test method for determining specific heat -  -
capacity by differential scanning calorimetry
DIN 51350-1 -  Testing of lubricants - Testing in the four-ball tester - Part -  -
1: General working principles
DIN 51350-2 -  Testing of lubricants - Testing in the four-ball tester - Part -  -
2: Determination of welding load of liquid lubricants
DIN 51350-3 -  Testing of lubricants - Testing in the four-ball tester - Part -  -
3: Determination of wearing characteristics of liquid
lubricants
OECD 301-B -  OECD Guidelines for the testing of chemicals - Section 3: -  -
Environmental fate and behaviour - 301 Ready
biodegradability - 301 B: CO2 Evolution test
OECD 301-C -  OECD Guidelines for the testing of chemicals - Section 3: -  -
Environmental fate and behaviour - 301 Ready
biodegradability - 301 C: Modified MITI test
OECD 301-F -  OECD Guidelines for the testing of chemicals - Section 3: -  -
Environmental fate and behaviour - 301 Ready
biodegradability - 301 F: Manometric respirometry test
EPA 712-C-98- US EPA OPPTS Series 835: Fate, transport and -  -
076 transformation test guidelines - Group C: Laboratory
biological transformation test guidelines - 835.3110
Ready biodegradability
IEC 63012 ®
Edition 1.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulating liquids – Unused modified or blended esters for electrotechnical

applications
Isolants liquides – Esters neufs modifiés ou mélangés pour applications

électrotechniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.040.10 ISBN 978-2-8322-6894-0

– 2 – IEC 63012:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
4 Classification . 10
4.1 General . 10
4.2 Fire performance classification . 10
4.3 Viscosity classification . 10
5 Properties, significance and test methods . 10
5.1 Physical properties . 10
5.1.1 Appearance . 10
5.1.2 Colour . 11
5.1.3 Viscosity . 11
5.1.4 Lubricity . 11
5.1.5 Thermal conductivity . 11
5.1.6 Thermal expansion coefficient . 11
5.1.7 Specific heat capacity . 11
5.1.8 Pour point . 11
5.1.9 Water content . 12
5.1.10 Water saturation . 12
5.1.11 Density . 12
5.1.12 Interfacial tension . 12
5.2 Electrical properties . 12
5.2.1 AC breakdown voltage .
...