IEC 61039:2008

Classification of insulating liquids

IEC 61039:2008 establishes the detailed classification of the N family (insulating liquids) that belongs to class L (lubricants, industrial oils and related products) in accordance with ISO 8681 and ISO 6743-99, affecting product categories that include products derived from petroleum processing, synthetic chemical products and synthetic and natural esters. The main change with regard to the previous edition concerns the updating of the classification of insulating liquids, taking into account the largest number possible of substances that have, or may have, possible application in electrical components.

Classification des liquides isolants

La CEI 61039:2008 établit la classification détaillée de la famille N (isolants liquides) qui appartient à la classe L (lubrifiants, huiles industrielles et produits connexes) conformément aux normes ISO 8681 et ISO 6743-99, affectant les catégories de produit qui incluent les produits dérivés du traitement du pétrole, les produits chimiques synthétiques et les esters naturels et synthétiques. La modification majeure par rapport à l'édition précédente concerne la mise à jour de la classification des liquides isolants, en tenant compte d'un nombre maximal de substances qui ont, ou peuvent avoir, des applications possibles dans les composants électriques.

General Information

• Status: Published
• Publication Date: 22-Jul-2008
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.040.10 - Insulating oils
• Technical Committee: TC 10 - Fluids for electrotechnical applications
• Current Stage: PPUB - Publication issued
• Start Date: 31-Aug-2008
• Completion Date: 23-Jul-2008

Standards Content (Sample)

IEC 61039
Edition 2.0 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Classification of insulating liquids

Classification des liquides isolants

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IEC 61039
Edition 2.0 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Classification of insulating liquids

Classification des liquides isolants

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 29.040.10 ISBN 2-8318-9939-7
– 2 – 61039 © IEC:2008
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 ISO classification system.7
4 Classification of insulating liquids .7
4.1 Class classification.7
4.2 Category classification .8
4.3 Identifying code.8
5 Summarizing outline .11
Bibliography.12

Figure 1 – Meaning of all the digits present in the classification of insulating liquids .11

Table 1 – Class classification of petroleum products or related products.8
Table 2 – Examples of classification for different insulating liquids .10

61039 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
CLASSIFICATION OF INSULATING LIQUIDS

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61039 has been prepared by IEC technical committee 10: Fluids
for electrotechnical applications.
This second edition cancels and replaces the first edition, published in 1990, and constitutes
a technical revision.
The main change with regard to the previous edition concerns the updating of the
classification of insulating liquids, taking into account the largest number possible of
substances that have, or may have, possible application in electrical components.
The text of this standard is based on the following documents:
FDIS Report on voting
10/741/FDIS 10/747/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.

– 4 – 61039 © IEC:2008
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
61039 © IEC:2008 – 5 –
INTRODUCTION
Health and safety
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 liquids which are the subject of this standard should be handled with due
regard to personal hygiene. Direct contact with eyes may cause slight irritation. In the case of
eye contact, irrigation with copious quantities of clean running water should be carried out
and medical advice sought.
Some of the tests specified in this standard involve the use of processes that could lead to a
hazardous situation. Attention is drawn to the relevant standard for guidance.
Environment
This standard involves insulating liquids, chemicals and used sample containers. The disposal
of these items should be carried out in accordance with current national legislation with
regard to the impact on the environment. Every precaution should be taken to prevent the
release into the environment of the insulating liquids.

– 6 – 61039 © IEC:2008
CLASSIFICATION OF INSULATING LIQUIDS

1 Scope
This International Standard establishes the detailed classification of the N family (insulating
liquids) that belongs to class L (lubricants, industrial oils and related products) in accordance
with ISO 8681 and ISO 6743-99, affecting product categories that include products derived
from petroleum processing, synthetic chemical products and synthetic and natural esters.
2 Normative references
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.
IEC/TS 60076-14:2004, Power transformers – Part 14: Design and application of liquid-
immersed power transformers using high-temperature insulation materials
IEC 60296:2003, Fluids for electrotechnical applications – Unused mineral insulating
oils for transformers and switchgear
IEC 60465:1988, Specification for unused insulating mineral oils for cables with oil ducts
IEC 60836:2005, Specifications for unused silicone insulating liquids for electrotechnical
purposes
IEC 60867:1993, Insulating liquids – Specifications for unused liquids based on synthetic
aromatic hydrocarbons
IEC 60963:1988, Specification for unused polybutenes
IEC 61099:1992, Specifications for unused synthetic organic esters for electrical purposes
ISO 1928:1995, Solid mineral fuels – Determination of gross calorific value
by the bomb calorimetric method, and calculation of net calorific value
ISO 2592:2000, Determination of flash and fire points – Cleveland open cup method
ISO 6743-99:2002, Lubricants, industrial oils and related products (class L) – Classification –
Part 99: General
ISO 8681:1986, Petroleum products and lubricants – Method of classification - Definition of
classes
OECD 301:1992, OECD guideline for testing of chemicals – Ready biodegradability
ASTM D240-02, Standard test method for heat of combustion of liquid hydrocarbon fuels by
bomb calorimeter
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