SIST EN 62135-1:2015

SLOVENSKI STANDARD
SIST EN 62135-1:2015
01-september-2015
1DGRPHãþD
SIST EN 62135-1:2009
Oprema za uporovno varjenje - 1. del: Varnostne zahteve za zasnovo, izdelavo in
inštalacijo
Resistance welding equipment - Part 1: Safety requirements for design, manufacture and
installation
Widerstandsschweißeinrichtungen - Teil 1: Sicherheitsanforderungen für die
Konstruktion, Herstellung und Errichtung
Matériels de soudage par résistance - Partie 1: Exigences de sécurité pour la
conception, la fabrication et l’installation
Ta slovenski standard je istoveten z: EN 62135-1:2015
ICS:
25.160.30 Varilna oprema Welding equipment
SIST EN 62135-1:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62135-1:2015

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SIST EN 62135-1:2015


EUROPEAN STANDARD EN 62135-1

NORME EUROPÉENNE

EUROPÄISCHE NORM
July 2015
ICS 25.160 Supersedes EN 62135-1:2008
English Version
Resistance welding equipment - Part 1: Safety requirements for
design, manufacture and installation
(IEC 62135-1:2015)
Matériels de soudage par résistance - Partie 1: Exigences Widerstandsschweißeinrichtungen - Teil 1:
de sécurité pour la conception, la fabrication et l'installation Sicherheitsanforderungen für die Konstruktion, Herstellung
(IEC 62135-1:2015) und Errichtung
(IEC 62135-1:2015)
This European Standard was approved by CENELEC on 2015-06-11. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 62135-1:2015 E

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SIST EN 62135-1:2015
EN 62135-1:2015
European foreword
The text of document 26/558/FDIS, future edition 2 of IEC 62135-1, prepared by IEC/TC 26 "Electric
welding" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 62135-1:2015.
The following dates are fixed:
(dop) 2016-03-11
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2018-06-11
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document supersedes EN 62135-1:2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment
Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).
Endorsement notice
The text of the International Standard IEC 62135-1:2015 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60085 NOTE Harmonized as EN 60085.
IEC 60112 NOTE Harmonized as EN 60112.
IEC 60364 NOTE Harmonized in HD 384 / HD 60364 series (partly modified).
IEC 60990 NOTE Harmonized as EN 60990.
IEC 62135-2 NOTE Harmonized as EN 62135-2.
ISO 5826 NOTE Harmonized as EN ISO 5826.
ISO 5828 NOTE Harmonized as EN ISO 5828.
ISO 8205-1 NOTE Harmonized as EN ISO 8205-1.
ISO 8205-2 NOTE Harmonized as EN ISO 8205-2.
2

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SIST EN 62135-1:2015
EN 62135-1:2015
ISO 12100 NOTE Harmonized as EN ISO 12100.
ISO 13732-1 NOTE Harmonized as EN ISO 13732-1.
IEC 13732 NOTE Harmonized in EN 13732 series (not modified).
1) 1)
ISO 14121-1 NOTE Harmonized as EN ISO 14121-1 .


1) Withdrawn.
3

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SIST EN 62135-1:2015
EN 62135-1:2015
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.

Publication Year Title EN/HD Year
IEC 60204-1 (mod) 2005 Safety of machinery - Electrical EN 60204-1 2006
equipment of machines -
- -  + corrigendum Feb. 2010
Part 1: General requirements
IEC 60364-4-41 (mod) 2005 Low-voltage electrical installations - HD 60364-4-41 2007
Part 4-41: Protection for safety -
- -  + corrigendum Jul. 2007
Protection against electric shock
IEC 60364-6 -  Low voltage electrical installations - HD 60364-6 -
Part 6: Verification
IEC 60417-DB -  Graphical symbols for use on - -
equipment
IEC 60445 -  Basic and safety principles for man- EN 60445 -
machine interface, marking and
identification - Identification of
equipment terminals, conductor
terminations and conductors
IEC 60529 -  Degrees of protection provided by EN 60529 -
enclosures (IP Code)
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems -
Part 1: Principles, requirements and
tests
IEC 60664-3 -  Insulation coordination for equipment EN 60664-3 -
within low-voltage systems -
Part 3: Use of coating, potting or
moulding for protection against pollution
IEC 61140 -  Protection against electric shock - EN 61140 -
Common aspects for installation and
equipment
4

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SIST EN 62135-1:2015
EN 62135-1:2015
Publication Year Title EN/HD Year
ISO 669 -  Resistance welding - Resistance - -
welding equipment - Mechanical and
electrical requirements
ISO 13849-1 -  Safety of machinery - Safety-related EN ISO 13849-1 -
parts of control systems -
Part 1: General principles for design

5

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SIST EN 62135-1:2015

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SIST EN 62135-1:2015




IEC 62135-1

®


Edition 2.0 2015-05




INTERNATIONAL



STANDARD








colour

inside










Resistance welding equipment –

Part 1: Safety requirements for design, manufacture and installation




























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 25.160 ISBN 978-2-8322-2664-3



  Warning! Make sure that you obtained this publication from an authorized distributor.


® Registered trademark of the International Electrotechnical Commission

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SIST EN 62135-1:2015
– 2 – IEC 62135-1:2015 © IEC 2015
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Environmental conditions . 11
5 Tests . 11
5.1 Test condition . 11
5.2 Measuring instruments . 11
5.3 Type tests . 12
5.4 Routine tests. 12
6 Protection against electric shock . 12
6.1 General . 12
6.2 Insulation . 13
6.2.1 General . 13
6.2.2 Clearances . 13
6.2.3 Creepage distances . 14
6.2.4 Insulation resistance . 16
6.2.5 Dielectric strength . 16
6.2.6 Welding circuit touch current . 18
6.2.7 Liquid cooling . 18
6.3 Protection against electric shock in normal service (direct contact) . 19
6.3.1 General . 19
6.3.2 Rated no-load voltage at the output . 19
6.3.3 Protection provided by barriers or the enclosure . 20
6.3.4 Capacitors . 21
6.3.5 Automatic discharge of input capacitors . 21
6.3.6 Protective conductor current under normal condition. 22
6.3.7 Touch current in normal condition . 22
6.4 Protection against electric shock in case of a fault condition (indirect
contact) . 22
6.4.1 General . 22
6.4.2 Protective provisions for welding circuit . 24
6.4.3 Internal conductors and connections . 36
6.4.4 Touch current in fault condition . 36
6.4.5 DC resistance welding equipment operating at mains frequency . 37
6.4.6 DC resistance welding equipment operating at medium frequency . 37
6.4.7 Continuity of the protective bonding circuit . 37
6.5 Additional user requirements. 38
6.6 Supply voltage . 38
6.7 Conductors of the welding circuit . 38
7 Thermal requirements . 38
7.1 Heating test . 38
7.1.1 Test conditions . 38
7.1.2 Tolerances of the test parameters . 39
7.1.3 Beginning of the heating test . 40
7.1.4 Duration of the test . 40

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SIST EN 62135-1:2015
IEC 62135-1:2015 © IEC 2015 – 3 –
7.2 Temperature measurement . 40
7.2.1 Measurements conditions . 40
7.2.2 Surface temperature sensor . 40
7.2.3 Resistance . 40
7.2.4 Embedded temperature sensor . 41
7.2.5 Determination of the ambient temperature (t ) . 41
a
7.2.6 Determination of cooling liquid temperature (t ) . 41
a
7.2.7 Recording of temperatures . 41
7.3 Limits of temperature rise . 42
7.3.1 Windings . 42
7.3.2 External surfaces . 42
7.3.3 Other components . 44
7.4 Protection from thermal hazards in normal service (direct contact) . 44
7.4.1 General . 44
7.4.2 Identification of hot surfaces . 44
7.4.3 Protection provided by insulation or other barriers . 45
7.4.4 Protection provided by supplemental cooling . 45
8 Abnormal operation . 45
8.1 General requirements . 45
8.2 Stalled fan test . 45
8.3 Cooling system failure . 45
8.4 Overload test . 46
9 Provisions against mechanical hazards . 46
9.1 General . 46
9.2 Risk analysis. 46
9.2.1 General . 46
9.2.2 Ready-to-use equipment as in delivery state . 46
9.2.3 Equipment not ready to use as in delivery state . 46
9.2.4 Equipment not ready for use and designed to be incorporated in more
complex equipment . 47
9.3 Measures . 47
9.3.1 Minimum measures . 47
9.3.2 Additional measures . 47
9.4 Conformity of components . 48
9.5 Starting for manual operated equipment . 48
10 Instructions and markings . 49
10.1 Instructions . 49
10.2 Markings . 49
10.3 Marking of terminals . 49
Annex A (informative) Nominal voltages of supply networks . 51
Annex B (normative) Construction of supply circuit terminals . 52
B.1 Size of terminals . 52
B.2 Spacings between supply circuit terminals . 52
B.3 Connections at the terminals . 53
B.4 Construction of the terminals . 53
B.5 Fixing of the terminals . 53
Annex C (normative) Touch current measurement in fault condition . 54
Annex D (informative) Extrapolation of temperature to time of shutdown . 56

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SIST EN 62135-1:2015
– 4 – IEC 62135-1:2015 © IEC 2015
Annex E (informative) Example of risk analysis and safety level requirement . 57
E.1 General . 57
E.2 Monitored hazards . 57
E.3 General measures . 57
E.4 Typical hazards by type of equipment . 57
E.4.1 General . 57
E.4.2 Spot welding . 58
E.4.3 Projection welding . 59
E.4.4 Seam welding . 60
E.4.5 Butt welding . 60
Annex F (informative) Indirect contact protection in resistance welding equipment . 61
F.1 Protection against indirect contact by automatic disconnection of the supply . 61
F.1.1 General . 61
F.1.2 TN system . 61
F.1.3 TT systems . 62
F.2 Automatic disconnection of supply in single phase a.c. current equipment . 63
F.2.1 TN system . 63
F.2.2 TT systems . 64
F.3 Automatic disconnection of supply in d.c. current equipment operating at
medium frequency (inverter equipment) . 64
F.3.1 TN system . 64
F.3.2 TT systems . 65
Bibliography . 68

Figure 1 – Measurement of welding circuit touch current . 18
Figure 2 – Measurement of rms values . 19
Figure 3 – Example of metal screen between windings of the supply circuit and the
welding circuit . 26
Figure 4 – Example of protective conductor connected directly to the welding circuit
(single-spot, a.c. current equipment) . 27
Figure 5 – Example of protective conductor connected directly to welding circuits
(multi-spot, a.c. current equipment) . 27
Figure 6 – Example of protective conductor connected directly to welding circuits
(medium-frequency equipment) . 28
Figure 7 – Example of protective conductor connected to welding circuits through
impedances . 29
Figure 8 – Example of protective conductor connected to welding circuits through
auto-inductances . 30
Figure 9 – Example of protective conductor connected to welding circuits through
auto-inductances . 30
Figure 10 – Example of current operated RCD (a.c. current equipment) . 31
Figure 11 – Example of current operated RCD (medium-frequency equipment) . 32
Figure 12 – Example of current operated residual current device and voltage relay . 33
Figure 13 – Example of current operated residual current device and safety-voltage
relay . 34
Figure 14 – Example of safety voltage relay . 35
Figure C.1 – Measuring network for weighted touch current . 54

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SIST EN 62135-1:2015
IEC 62135-1:2015 © IEC 2015 – 5 –
Figure C.2 – Diagram for touch current measurement on fault condition at operating
temperature for single-phase connection of appliances other than those of class II . 55
Figure C.3 – Diagram for touch current measurement on fault condition for three-
phase four-wire system connection of appliances other than those of class II . 55
Figure E.1 – Structure of a mounted machine . 58
Figure E.2 – Structure of a hand-held welding gun . 58
Figure E.3 – Structure of projection welding machinery . 59
Figure E.4 – Structure of seam welding machinery . 60
Figure E.5 – Structure of butt welding machinery . 60
Figure F.1 – Principle illustration of insulation fault . 61
Figure F.2 – Illustrations of TN systems . 62
Figure F.3 – Illustrations of TT systems . 63
Figure F.4 – Typical fault current . 65
Figure F.5 – Time-to-voltage reference curve . 67

Table 1 – Minimum clearances for overvoltage category III . 13
Table 2 – Minimum creepage distances . 15
Table 3 – Insulation resistance . 16
Table 4 – Dielectric test voltages . 17
Table 5 – Minimum distance through insulation . 25
Table 6 – Continuity of the protective bonding circuit . 37
Table 7 – Limits of temperature rise for windings . 42
Table 8 – Limits of temperature rise for external surfaces of hand-held equipment. 43
Table 9 – Limits of temperature rise for external surfaces of hand-guided equipment . 43
Table 10 – Limits of temperature rise for external surfaces of fixed equipment . 43
Table B.1 – Range of conductor dimensions to be accepted by the supply circuit
terminals . 52
Table B.2 – Spacing between supply circuit terminals . 53

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SIST EN 62135-1:2015
– 6 – IEC 62135-1:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

RESISTANCE WELDING EQUIPMENT –

Part 1: Safety requirements for design,
manufacture and installation

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
...