oSIST prEN IEC 61039:2023

SLOVENSKI STANDARD
01-november-2023
Splošna klasifikacija izolacijskih tekočin
Classification of insulating liquids
Klassifizierung der Isolierflüssigkeiten
Classification des liquides isolants
Ta slovenski standard je istoveten z: prEN IEC 61039:2023
ICS:
29.040.10 Izolacijska olja Insulating oils
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

10/1204/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61039 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-09-08 2023-12-01
SUPERSEDES DOCUMENTS:
10/1189/CD, 10/1196A/CC
IEC TC 10 : FLUIDS FOR ELECTROTECHNICAL APPLICATIONS
SECRETARIAT: SECRETARY:
Italy Mr Massimo Pompili
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 14, TC 20, SC 36A, TC 38
Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
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CENELEC, is drawn to the fact that this Committee Draft for Vote
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(See AC/22/2007 or NEW GUIDANCE DOC).

TITLE:
Classification of insulating liquids

PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
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10/1204/CDV – 2 – IEC CDV 61039  IEC 2023
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 . 9
5 Summarizing outline . 11

Figure 1 – Meaning of all the digits present in the classification of insulating liquids . 12

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

IEC CDV 61039  IEC 2023 – 3 – 10/1204/CDV
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
CLASSIFICATION OF ELECTRICAL INSULATING LIQUIDS

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
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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 third edition cancels and replaces the second edition, published in 2008, 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/XXXX/FDIS 10/XXXX/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.

10/1204/CDV – 4 – IEC CDV 61039  IEC 2023
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 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.
IEC CDV 61039  IEC 2023 – 5 – 10/1204/CDV
1 INTRODUCTION
2 Health and safety
3 This International Standard does not purport to address all the safety problems associated
4 with its use. It is the responsibility of the user of the standard to establish appropriate health
5 and safety practices and determine the applicability of regulatory limitations prior to use.
6 The insulating liquids which are the subject of this standard should be handled with due
7 regard to personal hygiene. Direct contact with eyes may cause slight irritation. In the case of
8 eye contact, irrigation with copious quantities of clean running water should be carried out
9 and medical advice sought.
10 Some of the tests specified in this standard involve the use of processes that could lead to a
11 hazardous situation. Attention is drawn to the relevant standard for guidance.
12 Environment
13 This standard involves insulating liquids, chemicals and used sample containers. The disposal
14 of these items should be carried out in accordance with current national legislation with
15 regard to the impact on the environment.
16 Every insulating liquid, which floats on water is generally a water hazard, as they reduce
17 oxygen ingress into the water. No liquid in spite of its classification can be freely spilled in
18 the environment. The handling of insulating liquids shall be carried out in accordance with
19 current national legislation with regard to the impact on the environment. Every precaution
20 should be taken to prevent the release into the environment.
10/1204/CDV – 6 – IEC CDV 61039  IEC 2023
23 CLASSIFICATION OF ELECTRICAL INSULATING LIQUIDS
27 1 Scope
28 This International Standard establishes the detailed classification of the N family (insulating
29 liquids) that belongs to class L (lubricants, industrial oils and related products) in accordance
30 with ISO 8681 and ISO 6743-99, affecting product categories that include products derived
31 from petroleum processing, synthetic chemical products and synthetic and natural esters.
32 This standard applies to unused liquids. For liquids in service, additional testing may be
33 required to ensure compliance with this standard.
34 2 Normative references
35 The following referenced documents are indispensable for the application of this document.
36 For dated references, only the edition cited applies. For undated references, the latest edition
37 of the referenced document (including any amendments) applies.
38 IEC 60296, Fluids for electrotechnical applications – Unused mineral insulating
39 oils for transformers and switchgear
40 IEC 60836, Specifications for unused silicone insulating liquids for electrotechnical purposes
41 IEC 60867, Insulating liquids – Specifications for unused liquids based on synthetic aromatic
42 hydrocarbons
43 IEC 61099, Specifications for unused synthetic organic esters for electrical purposes
44 IEC 62770, Fluids for electrotechnical applications - Unused natural esters for transformers
45 and similar electrical equipment
46 IEC 63012, Insulating liquids - Unused modified or blended esters for electrotechnical
47 applications
48 ISO 2592, Determination of flash and fire points – Cleveland open cup method
49 ISO 6743-99:2002, Lubricants, industrial oils and related products (class L) – Classification –
50 Part 99: General
51 ISO 8681, Petroleum products and lubricants – Method of classification - Definition of classes
52 OECD 301:1992, OECD guideline for testing of chemicals – Ready biodegradability
53 ASTM D240, Standard test method for heat of combustion of liquid hydrocarbon fuels by
54 bomb calorimeter
IEC CDV 61039  IEC 2023 – 7 – 10/1204/CDV
55 3 ISO classification system
56 ISO 8681 sets out the main rules of the classification system that applies to petroleum
57 products, lubricants and related products. This document sets out the classification method
58 which can be used for electrical insulating liquids.
59 ISO 8681 suggests, as far as possible, to choose the application field as the main principle for
60 the classification of petroleum products, lubricants, and related products. It also suggests
61 classifying on the basis of the product typology, e.g. fuels are classified first of all on the
62 basis of typology and secondly on the basis of end use.
63 The ISO classification principle is based on the allocation of a code consisting of letters and
64 numbers for the main classes and categories of petroleum products.
65 The complete nomination consists of:
66 – the initials “ISO”;
67 – the class of the petroleum product or related product, indicated by a letter (see Table 1),
68 which has to be clearly separated from the other symbols;
69 – the category, indicated by a group of four letters, the first one always identifying the family
70 to which it belongs and the others assuming a meaning, appropriately explained in the
71 reference standard, which depends on the particular category of concerned products;
72 – (optional) some numbers, which can be added, to complete the nomination and that have
73 a meaning appropriately explained in the reference standard for that particular category of
74 products.
75 In compliance with ISO 8681, the code should have the following general form:
76 ISO – CLASS – CATEGORY – (eventual) NUMBERS
77 or the short form:
78 CLASS – CATEGORY – (eventual) NUMBERS
79 4 Classification of electrical insulating liquids
80 In accordance with ISO 8681, the classification system indicates the products with a
81 nomination that in
...