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TECHNICAL IEC
SPECIFICATION TS 62081
First edition
1999-05
Arc welding equipment –
Installation and use
This English-language version is derived from the original
bilingual publication by leaving out all French-language
pages. Missing page numbers correspond to the French-
language pages.
Reference number
IEC/TS 62081:1999(E)
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
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TECHNICAL IEC
SPECIFICATION TS 62081
First edition
1999-05
Arc welding equipment –
Installation and use
© IEC 1999 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: [email protected] Web:
PRICE CODE
S
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
62081/TS © IEC:1999 – 3 –
CONTENTS
Page
FOREWORD 5
..........................................................................................................................
Clause
1 Scope 7
..............................................................................................................................
2 Normative references 7
.......................................................................................................
3 Definitions 9
........................................................................................................................
4 Installation 11
.....................................................................................................................
4.1 General 11
.................................................................................................................
4.1.1 Selection of supply cable and protection against overload 11
..........................
4.1.2 Supply disconnecting device 11
......................................................................
4.1.3 Emergency stopping device 11
.......................................................................
4.1.4 Protection against electric shock from the mains supply 13
.............................
4.2 Welding circuit 13
......................................................................................................
4.2.1 Isolation from the mains supply 13
.................................................................
4.2.2 Welding voltage supply 13
..............................................................................
4.2.3 Connection between the welding power source and the work piece 13
............
4.2.4 Earthing of the work piece 15
.........................................................................
4.2.5 Location of gas cylinders 15
...........................................................................
5 Use 17
................................................................................................................................
5.1 General requirements 17
............................................................................................
5.2 Connection between several welding power sources 17
..............................................
5.3 Inspection and maintenance of the welding installation 17
..........................................
5.4 Disconnection of welding power sources and/or welding circuits 17
............................
5.5 Guards 19
..................................................................................................................
5.6 Information for operators 19
.......................................................................................
5.7 Protective measures 19
.............................................................................................
5.7.1 Extraneous conductive parts in the welding area 19
........................................
5.7.2 Protection against electric shock 19
...............................................................
5.8 Isolation of the welding circuit from the work piece and earth when not in use 19
........
5.9 Voltage between electrode holders or torches/guns 21
...............................................
5.10 Welding in an environment with increased hazard of electric shock 25
........................
5.11 Use of shoulder slings 27
...........................................................................................
5.12 Welding at elevated positions 27
................................................................................
Annex A – Hazards connected with arc welding 29
.....................................................................
Bibliography 41
.........................................................................................................................
62081/TS © IEC:1999 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ARC WELDING EQUIPMENT –
Installation and use
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports, technical specifications or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this technical specification may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
the required support cannot be obtained for the publication of an International Standard,
•
despite repeated efforts, or
the subject is still under technical development or where, for any other reason, there is the
•
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 62081, which is a technical specification, has been prepared by technical committee 26:
Electric welding.
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
26/136/CDV 26/143 + 143A/RVC
Full information on the voting for the approval of this technical specification can be found in the
report on voting indicated in the above table.
62081/TS © IEC:1999 – 7 –
ARC WELDING EQUIPMENT –
Installation and use
1 Scope
This technical specification is applicable to the installation and industrial and professional use
of welding power sources, equipment and accessories for arc welding and allied processes.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this technical specification. For dated references, subsequent
amendments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this technical specification are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60050-195:1998,
International Electrotechnical Vocabulary – Part 195: Earthing and
protection against electric shock
IEC 60204-1:1997, Electrical equipment of industrial machines – Part 1: General requirements
IEC 60364-4-41:1992, Electrical installations of buildings – Part 4: Protection for safety –
Chapter 41: Protection against electric shock
IEC 60947-2:1995, Low-voltage switchgear and controlgear – Part 2: Circuit breakers
IEC 60974-1:1998, Arc welding equipment – Part 1: Welding power sources
IEC 60974-11:1992, Arc welding equipment – Part 11: Electrode holders
IEC 60974-12:1992, Arc welding equipment – Part 12: Coupling devices for welding cables
IEC 61008 (all parts), Residual current operated circuit-breakers without integral overcurrent
protection for household and similar uses (RCCB's)
IEC 61009 (all parts), Residual current operated circuit-breakers with integral overcurrent
protection for household and similar uses (RCBO's)
IEC 61140:1997, Protection against electric shock – Common aspects for installation and
equipment
62081/TS © IEC:1999 – 9 –
3 Definitions
For the purpose of this technical specification, the following definitions apply:
3.1
welding circuit
a circuit that includes all conductive material through which the welding current is intended to
flow
NOTE 1 – In arc welding, the arc is a part of the welding circuit.
NOTE 2 – In certain arc welding processes, the arc may be established between two electrodes. In such a case, the
work piece is not necessarily a part of the welding circuit. [IEC 60974-1, 3.11]
3.2
extraneous conductive part
conductive part not forming part of the electrical installation and liable to introduce an electric
potential, generally the electric potential of a local earth [IEV 195-06-11]
NOTE – Electrical installation includes the welding circuit.
3.3
work piece
metal piece or pieces on which welding or allied processes are performed
3.4
protective clothing and accessories
protective clothing and accessories (e.g. gloves, hand shields, head masks and filter lenses)
used in order to diminish electric shock risks and the effects of fume and spatter and to protect
the skin and eyes against arc radiation
3.5
environments with increased hazard of electric shock
environments where the hazard of electric shock by arc welding is increased in relation to
normal arc welding conditions
NOTE 1 – Such environments are found for example
a) in locations in which freedom of movement is restricted, so that the operator is forced to perform the welding in
a cramped position (kneeling, sitting, lying) with physical contact with conductive parts;
b) in locations which are fully or partially limited by conductive elements and in which there is a high risk of
unavoidable or accidental contact by the operator;
c) in wet, damp or hot locations where humidity or perspiration considerably reduces the skin resistance of the
human body and the insulating properties of accessories.
NOTE 2 – Environments with increased hazard of electric shock are not meant to include places where electrically
conductive parts in the near vicinity of the operator which can cause increased hazard have been insulated.
[IEC 60974-1, 3.46]
3.6
industrial and professional use
use intended only for experts or instructed persons [IEC 60974-1, 3.2]
3.7
expert (competent person, skilled person)
a person who can judge the work assigned and recognize possible hazards on the ba
...