IEC 60475:2011

IEC 60475 ®
Edition 2.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Method of sampling insulating liquids

Méthode d'échantillonnage des liquides isolants

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IEC 60475 ®
Edition 2.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Method of sampling insulating liquids

Méthode d'échantillonnage des liquides isolants

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 29.040 ISBN 978-2-88912-767-2

– 2 – 60475 © IEC:2011
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General principles for the sampling of insulating liquids . 7
4.1 New insulating liquids in delivery containers . 7
4.1.1 Place of sampling . 7
4.1.2 Quantity of sample to be taken . 7
4.1.3 Sampling equipment . 7
4.1.4 Sampling procedure. 11
4.2 Sampling of oil from oil-filled equipment . 13
4.2.1 General remarks . 13
4.2.2 Sampling of oil by syringe . 19
4.2.3 Sampling of oil by ampoule . 20
4.2.4 Sampling of oil by flexible metal bottles . 21
4.2.5 Sampling of oil by glass and rigid metal bottles . 22
4.2.6 Sampling of oil by plastic bottles . 23
4.3 Storage and transportation of samples . 23
4.4 Labelling of samples . 23
Annex A (informative) Procedure for sampling at intermediate levels (making up of the
average sample) . 25
Annex B (informative) Procedure for testing the integrity of the syringes . 26

Figure 1 – Thief dipper . 8
Figure 2 – Cream dipper . 9
Figure 3 – Pipette . 10
Figure 4 – Siphon . 10
Figure 5 – Sampling of oil by syringe . 15
Figure 6 – Sampling of oil by ampoule . 16
Figure 7 – Sampling of oil by bottle . 17

Table 1 – Types of samples of new insulating liquids . 11
Table 2 – Sample containers for oil tests (Y = Yes) . 18
Table 3 – Information required on oil sample labels . 24

60475 © IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
METHOD OF SAMPLING INSULATING LIQUIDS

FOREWORD
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International Standard IEC 60475 has been prepared by IEC technical committee 10: Fluids
for electrotechnical applications.
This second edition cancels and replaces the first edition, published in 1974, and constitutes
a technical revision.
The main changes with respect to the previous edition are listed below:
– since the publication of the first edition of this standard, askarels have been banned and
therefore have been withdrawn from this second edition;
– recommendations concerning general health, safety and environmental protection have
been added as an Introduction;
– the first edition was mainly about sampling from drums and tank cars. This second edition
addresses in more detail the sampling of oil from electrical equipment, using various types
of sampling devices appropriate for the different types of oil tests to be performed in the
laboratory, including dissolved gas analysis (DGA).

– 4 – 60475 © IEC:2011
The text of this standard is based on the following documents:
FDIS Report on voting
10/848/FDIS 10/871/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
60475 © IEC:2011 – 5 –
INTRODUCTION
General caution, health, safety and environmental protection
This International Standard does not purport to address all the safety problems associated
with its use. It is the responsibility of the user of the standard to establish appropriate health
and safety practices and determine the applicability of regulatory limitations prior to use.
The insulating oils which are the subject of this standard should be handled with due regard to
personal hygiene. Direct contact with the eyes may cause irritation. In the case
...