SIST EN 61112:2009

SLOVENSKI STANDARD
SIST EN 61112:2009
01-oktober-2009
1DGRPHãþD
SIST-TS CLC/TS 61112:2007
'HORSRGQDSHWRVWMR3UHJULQMDOD]DHOHNWULþQRL]RODFLMR,(&
Live working - Electrical insulating blankets
Arbeiten unter Spannung – Elektrisch isolierende Abdecktücher
Travaux sous tension - Nappes isolantes électriques
Ta slovenski standard je istoveten z: EN 61112:2009
ICS:
13.260 9DUVWYRSUHGHOHNWULþQLP Protection against electric
XGDURP'HORSRGQDSHWRVWMR shock. Live working
SIST EN 61112:2009 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61112:2009

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SIST EN 61112:2009

EUROPEAN STANDARD
EN 61112

NORME EUROPÉENNE
June 2009
EUROPÄISCHE NORM

ICS 13.260; 29.240.20; 29.260.99 Supersedes CLC/TS 61112:2006


English version


Live working -
Electrical insulating blankets
(IEC 61112:2009)


Travaux sous tension -  Arbeiten unter Spannung -
Nappes isolantes électriques Elektrisch isolierende Abdecktücher
(CEI 61112:2009) (IEC 61112:2009)




This European Standard was approved by CENELEC on 2009-06-01. 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, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

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

Central Secretariat: Avenue Marnix 17, B - 1000 Brussels


© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61112:2009 E

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SIST EN 61112:2009
EN 61112:2009 - 2 -
Foreword
The text of document 78/785/FDIS, future edition 2 of IEC 61112, prepared by IEC TC 78, Live working,
was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61112 on
2009-06-01.
This European Standard supersedes CLC/TS 61112:2006.
EN 61112:2009 includes the following significant technical changes with regard to CLC/TS 61112:2006:
– general review of the requirements and test provisions;
– limitation of the scope in terms of the minimum width of electrical insulating blankets in rolls;
– introduction of a definition of electrical insulating blankets including sheeting in various shapes and in
rolls;
– introduction of Class 00;
– withdrawal of category S and introduction of category R;
– clarification of the way electrical insulating blankets in rolls are covered by the test procedures;
– specification of standard and alternative types of electrodes for the proof test;
– modification of the test procedures for low and extremely low temperature by replacing the dielectric
proof test by a withstand test in the sanction;
– modification of the test procedures for acid and oil resistance by specifying the use of test pieces and
by replacing the dielectric proof test by a withstand test in the sanction;
– specification of liquid 102 for the oil resistance test and harmonisation of the mechanical test sanction
with the acid resistance test;
– preparation of the elements of evaluation of defects, and general application of EN 61318:2008;
– revision of existing annexes;
– deletion of Annexes D and F, not applicable according to EN 61318:2008;
– introduction of a new normative Annex F on classification of defects.
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) 2010-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-06-01
Annex ZA has been added by CENELEC.
__________

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SIST EN 61112:2009
- 3 - EN 61112:2009
Endorsement notice
The text of the International Standard IEC 61112:2009 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60743 NOTE  Harmonized as EN 60743:2001 + A1:2008 (not modified).
+ A1
__________

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SIST EN 61112:2009
EN 61112:2009 - 4 -
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  When 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 60060-1 - High-voltage test techniques - HD 588.1 S1 1991
Part 1: General definitions and test
requirements


1) 2)
IEC 60060-2 - High-voltage test techniques - EN 60060-2 1994
Part 2: Measuring systems


1) 2)
IEC 60068-1 - Environmental testing - EN 60068-1 1994
Part 1: General and guidance


IEC 60212 1971 Standard conditions for use prior to and HD 437 S1 1984
during the testing of solid electrical insulating
materials


IEC 60417 Data- Graphical symbols for use on equipment - -
base


1) 2)
IEC 61318 - Live working - Conformity assessment EN 61318 2008
applicable to tools, devices and equipment


1) 2)
IEC 61477 - Live working - Minimum requirements for the EN 61477 2009
utilization of tools, devices and equipment


1) 2)
ISO 2592 - Determination of flash and fire points - EN ISO 2592 2001
Cleveland open cup method


1)
ISO 2977 - Petroleum products and hydrocarbon - -
solvents - Determination of aniline point and
mixed aniline point


1) 2)
ISO 3104 - Petroleum products - Transparent and EN ISO 3104 1996
opaque liquids - Determination of kinematic
viscosity and calculation of dynamic viscosity


ASTM D 3767 2003 Standard Practice for Rubber - Measurement - -
of Dimensions



1)
Undated reference.
2)
Valid edition at date of issue.

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SIST EN 61112:2009
IEC 61112
®
Edition 2.0 2009-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Live working – Electrical insulating blankets

Travaux sous tension – Nappes isolantes électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 13.260; 29.240.20; 29.260.99 ISBN 2-8318-1036-5
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 61112:2009
– 2 – 61112 © IEC:2009
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 Requirements .9
4.1 General .9
4.2 Classification.9
4.3 Physical requirements .9
4.3.1 Composition .9
4.3.2 Shape and design.9
4.3.3 Dimensions and tolerances.11
4.3.4 Workmanship and finish .11
4.4 Mechanical, climatic and environmental requirements .12
4.5 Dielectric requirements.12
4.6 Marking .12
4.7 Packaging .13
4.8 Instructions for use.13
5 Tests .13
5.1 General .13
5.2 Visual inspection and measurements.14
5.2.1 General .14
5.2.2 Classification.14
5.2.3 Composition .14
5.2.4 Dimensions, workmanship and finish .14
5.2.5 Thickness .14
5.3 Marking .15
5.3.1 Visual inspection and measurement .15
5.3.2 Durability of marking.15
5.4 Packaging and instructions for use .15
5.5 Mechanical tests .15
5.5.1 General .15
5.5.2 Tensile strength and elongation at break .15
5.5.3 Mechanical puncture resistance.16
5.5.4 Tension set for elastomer material.18
5.5.5 Tear resistance test for plastic material .18
5.6 Dielectric tests .19
5.6.1 General .19
5.6.2 Electrodes .20
5.6.3 Test equipment.22
5.6.4 Electrical test procedure .23
5.7 Ageing tests .24
5.8 Thermal tests .25
5.8.1 Flame retardance test.25
5.8.2 Low temperature folding test (except for category C blankets) .26
6 Tests on electrical insulating blankets with special properties.27

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SIST EN 61112:2009
61112 © IEC:2009 – 3 –
6.1 General .27
6.2 Category A: Acid resistance .27
6.3 Category H: Oil resistance.27
6.4 Category Z: Ozone resistance .27
6.4.1 General .27
6.4.2 Test methods.28
6.5 Category M: Mechanical puncture resistance.29
6.6 Category C: Extremely low temperature folding test .29
7 Conformity assessment of electrical insulating blankets having completed the
production phase.29
8 Modifications .30
Annex A (informative) Guidelines for the selection of the class of electrical insulating
blankets in relation to nominal voltage of a system .31
Annex B (informative) In-service care and testing .32
Annex C (normative) Suitable for live working ; double triangle (IEC 60417-5216
(2002-10)).34
Annex D (normative) General type test procedure.35
Annex E (normative) Liquid for tests on electrical insulating blankets of category H –
Oil resistance.38
Annex F (normative) Classification of defects and tests to be allocated .39
Bibliography.40

Figure 1 – Example of plain design .10
Figure 2 – Example of slotted design .10
Figure 3 – Plan view of the dumb-bell test piece .16
Figure 4 – Test plates and needle for resistance to mechanical puncture.17
Figure 5 – Tear resistance test .19
Figure 6 – Test set-up for voltage proof test of electrical insulating blankets with
standard type of electrodes.20
Figure 7 – Test set-up for voltage proof test of electrical insulating blankets with
alternative type of electrodes .22
Figure 8 – Test set-up for voltage withstand test.23
Figure 9 – Test set-up for low and extremely low temperature folding tests.26
Figure 10 – Ozone resistance – Method B test set-up .28

Table 1 – Special properties .9
Table 2 – Common lengths and widths for electrical insulating blankets.11
Table 3 – Maximum thickness for electrical insulating blankets .11
Table 4 – Maximum electrode clearance for proof tests .21
Table 5 – Test voltages.24
Table A.1 – Designation maximum use voltage .31
Table D.1 – List and chronological order of type tests.35
Table E.1 – Characteristics of oil no. 1.38
Table F.1 – Classification of defects and associated requirements and tests .39

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SIST EN 61112:2009
– 4 – 61112 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

LIVE WORKING –
ELECTRICAL INSULATING BLANKETS


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
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 61112 has been prepared by IEC technical committee 78: Live
working.
This second edition cancels and replaces the first edition, published in 1992, and its
Amendment 1 (2002). This edition constitutes a technical revision.
It includes the following significant technical changes from the previous edition:
– general review of the requirements and test provisions;
– limitation of the scope in terms of the minimum width of electrical insulating blankets in
rolls;
– introduction of a definition of electrical insulating blankets including sheeting in various
shapes and in rolls;
– introduction of Class 00;
– withdrawal of category S and introduction of category R;
– clarification of the way electrical insulating blankets in rolls are covered by the test
procedures;

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SIST EN 61112:2009
61112 © IEC:2009 – 5 –
– specification of standard and alternative types of electrodes for the proof test;
– modification of the test procedures for low and extremely low temperature by replacing the
dielectric proof test by a withstand test in the sanction;
– modification of the test procedures for acid and oil resistance by specifying the use of test
pieces and by replacing the dielectric proof test by a withstand test in the sanction;
– specification of liquid 102 for the oil resistance test and harmonisation of the mechanical
test sanction with the acid resistance test;
– preparation of the elements of evaluation of defects, and general application of IEC 61318
Ed.3;
– revision of existing annexes;
– deletion of Annexes D and F, not applicable according to IEC 61318 Ed.3;
– introduction of a new normative Annex F on classification of defects.
The text of this standard is based on the following documents:
FDIS Report on voting
78/785/FDIS 78/799/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 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.

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SIST EN 61112:2009
– 6 – 61112 © IEC:2009
INTRODUCTION
This International Standard has been prepared according to the requirements of IEC 61477
where applicable.
The product covered by this standard may have an impact on the environment during some or
all stages of its life cycle. These impacts can range from slight to significant, be of short-term
or long-term, and occur at the global, regional or local level.
Except for a disposal statement in the instructions for use, this standard does not include
requirements and test provisions for the manufacturers of the product, or recommendations to
the users of the product for environmental improvement. However, all parties intervening in its
design, manufacture, packaging, distribution, use, maintenance, repair, reuse, recovery and
disposal are invited to take account of environmental considerations.

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SIST EN 61112:2009
61112 © IEC:2009 – 7 –
LIVE WORKING –
ELECTRICAL INSULATING BLANKETS



1 Scope
This International Standard is applicable to electrical insulating blankets for the protection of
workers from accidental contact with live or earthed electrical conductors, apparatus or
circuits and avoidance of short circuits on electrical installations.
Electrical insulating blankets in rolls having a width lower than 50 mm are not covered by this
standard.
NOTE 1 For a.c. electrical classification, as well as d.c. use, see 4.2.
NOTE 2 This standard gives a.c. test provisions. There is limited history for use in d.c. applications.
NOTE 3 See Annex A for suggested maximum voltage use.
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 60060-1, High-voltage test techniques – Part 1: General definitions and test
requirements
IEC 60060-2, High-voltage test techniques – Part 2: Measuring systems
IEC 60068-1, Environmental testing – Part 1: General and guidance
IEC 60212:1971, Standard conditions for use prior to and during the testing of solid electrical
insulating materials
IEC 60417, Graphical symbols for use on equipment
IEC 61318, Live working – Conformity assessment applicable to tools, devices and
equipment
IEC 61477, Live working – Minimum requirements for the utilization of tools, devices and
equipment
ISO 2592, Determination of flash and fire points – Cleveland open cup method
ISO 2977, Petroleum products and hydrocarbon solvents – Determination of aniline point and
mixed aniline point
ISO 3104, Petroleum products – Transparent and opaque liquids – Determination of kinematic
viscosity and calculation of dynamic viscosity
ASTM D 3767:2003 (reapproved 2008): Standard practice for rubber – Measurement of
dimensions

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SIST EN 61112:2009
– 8 – 61112 © IEC:2009
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61318 and the
following apply.
3.1
disruptive discharge
passage of an arc following dielectric breakdown
NOTE 1 The term “sparkover” (in French “amorçage”) is used when a disruptive discharge occurs in a gaseous or
liquid dielectric.
NOTE 2 The term “flashover” (in French “contournement”) is used when a disruptive discharge occurs at least
partly along the surface of a solid dielectric surrounded by a gaseous or liquid medium.
NOTE 3 The term “puncture” (in French “perforation”) is used when a disruptive discharge occurs through a solid
dielectric producing permanent damage.
[IEV 651-01-18 and definition 2.7.7 of IEC 60743, modified]
3.2
elastomer
macromolecular material which returns rapidly to its initial dimensions and shape after
substantial deformation by a weak stress and release of the stress
NOTE 1 The definition applies under room temperature test conditions.
NOTE 2 Elastomer is a generic term that includes rubber, latex and elastomeric compounds that may be natural
or synthetic or a mixture or a combination of both. It also includes thermoplastic elastomer (TPE) material.
[ISO 472 modified]
3.3
electrical insulating blanket
flexible sheeting made of elastomer or plastic material, used to cover conductors or metallic
parts which are either energized, dead or earthed
NOTE The sheeting is either of various definite shapes or in roll allowing the workers to custom-cut the material
to fit the application.
[Definition 5.2.2 of IEC 60743 and IEV 651-04-06, modified]
3.4
nominal voltage (of a system)
suitable approximate value of voltage used to designate or identify a system
[IEV 601-01-21]
3.5
plastic
material which contains as an essential ingredient a high polymer and which at some stage in
its processing into finished products can be shaped by flow
NOTE 1 Elastomeric materials, which also are shaped by flow, are not considered as plastics.
NOTE 2 In some countries, particularly in the United Kingdom, it is a permitted option to use the term “plastics” as
the singular form as well as the plural form.
[Definition 2.4.4 of IEC 60743 and ISO 472]
3.6
proof test voltage
specified voltage that is applied to a device or test piece for the time defined under specified
conditions to assure that the electrical strength of the insulation is above a specified value

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SIST EN 61112:2009
61112 © IEC:2009 – 9 –
3.7
withstand test voltage
voltage that a test piece is required to withstand without disruptive discharge or other electric
failure when voltage is applied under
...