EN 60247:2004

SLOVENSKI SIST EN 60247:2004
STANDARD
september 2004
Izolirne tekočine - Merjenje relativne dielektrične konstante, faktor dielektrične
izgube (tangens ) in enosmerne upornosti (IEC 60247:2004)
Insulating liquids - Measurement of relative permittivity, dielectric dissipation factor
(tan ) and dc resistivity (IEC 60247:2004)
ICS 29.040.01 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60247
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2004
ICS 17.220.99; 29.040.10
English version
Insulating liquids –
Measurement of relative permittivity,
dielectric dissipation factor (tan δ) and d.c. resistivity
(IEC 60247:2004)
Liquides isolants –  Isolierflüssigkeiten –
Mesure de la permittivité relative, Messung der Permittivitätszahl,
du facteur de dissipation diélectrique
des dielektrischen Verlustfaktors (tan δ)
(tan δ) et de la résistivité en courant und des spezifischen Gleichstrom-
continu Widerstandes
(CEI 60247:2004) (IEC 60247:2004)

This European Standard was approved by CENELEC on 2004-04-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

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

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

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60247:2004 E
Foreword
The text of document 10/573/FDIS, future edition 3 of IEC 60247, prepared by IEC TC 10, Fluids for
electrotechnical applications, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60247 on 2004-04-01.
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) 2005-01-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-04-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60247:2004 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60247:2004
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 Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60093 - Methods of test for volume resistivity and HD 429 S1 1983
surface resistivity of solid electrical
insulating materials
1)
IEC 60250 - Recommended methods for the - -
determination of the permittivity and
dielectric dissipation factor of electrical
insulating materials at power, audio and
radio frequencies including metre
wavelengths
1)
IEC 60475 - Method of sampling liquid dielectrics - -

1) 2)
IEC 61620 - Insulating liquids - Determination of the EN 61620 1999
dielectric dissipation factor by
measurement of the conductance and
capacitance - Test method
1)
Undated reference.
2)
Valid edition at date of issue.

NORME
CEI
INTERNATIONALE IEC
INTERNATIONAL
Troisième édition
STANDARD
Third edition
2004-02
Liquides isolants –
Mesure de la permittivité relative,
du facteur de dissipation diélectrique (tan δδδδ)
et de la résistivité en courant continu
Insulating liquids –
Measurement of relative permittivity,
dielectric dissipation factor (tan δδ)
δδ
and d.c. resistivity
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60247 © IEC:2004 – 3 –
CONTENTS
FOREWORD.7
INTRODUCTION.11
1 Scope.13
2 Normative references.13
3 Terms and definitions .13
4 General .15
4.1 Permittivity and dielectric dissipation factor (tan δ) .15
4.2 Resistivity.17
4.3 Sequence of determinations.17
4.4 Factors leading to erroneous results .17
5 Apparatus.19
5.1 Test cell .19
5.2 Test equipment.21
5.3 Glassware .21
5.4 Measuring instrument for permittivity and tan δ.21
5.5 Measuring instrument for d.c. resistivity .21
5.6 Time-measuring device.21
5.7 Safety.21
6 Cleaning solvent .23
7 Cleaning the test cell .23
7.1 Trisodium phosphate cleaning procedure .23
7.2 Storage of cell .25
8 Sampling .25
9 Preparation of samples .25
10 Conditioning and filling the test cell .27
10.1 Cell conditioning .27
10.2 Filling the cell .27
11 Test temperature .27
12 Measurement of dissipation factor (tan δ).29
12.1 Test voltage.29
12.2 Measurement .29
12.3 Report .29
13 Measurement of relative permittivity.29
13.1 Measurement .29
13.2 Report .31
14 Measurement of d.c. resistivity.31
14.1 Test voltage.31
14.2 Time of electrification .31
14.3 Measurement .31
14.4 Report .33

60247 © IEC:2004 – 5 –
Annex A (informative) Example of an alternative procedure for cleaning the test cell –
Ultrasonic procedure .35
Annex B (informative) Example of a simplified cleaning procedure for a test cell .37
Annex C (informative) Alternative procedures for routine testing of dielectric dissipation
factor and resistivity of insulating liquids.39
Figure 1 – Example of a three-terminal cell for measurements on liquids .45
Figure 2 – Example of screening for the cell of Figure 1.47
Figure 3 – Example of assembling drawing of cell.49
Figure 4 – Example of a two-terminal cell for measurements in liquids .51
Figure 5 – Example of a test cell designed for low-loss dielectric liquids .53

60247 © IEC:2004 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
INSULATING LIQUIDS –
MEASUREMENT OF RELATIVE PERMITTIVITY,
DIELECTRIC DISSIPATION FACTOR (TAN δδδδ)
AND DC RESISTIVITY
FOREWORD
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