IEC 62135-1:2008

IEC 62135-1
Edition 1.0 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Resistance welding equipment –
Part 1: Safety requirements for design, manufacture and installation

Matériels de soudage par résistance –
Partie 1: Exigences de sécurité pour la conception, la fabrication et l’installation

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IEC 62135-1
Edition 1.0 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Resistance welding equipment –
Part 1: Safety requirements for design, manufacture and installation

Matériels de soudage par résistance –
Partie 1: Exigences de sécurité pour la conception, la fabrication et l’installation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XB
CODE PRIX
ICS 25.160 ISBN 2-8318-9823-4
– 2 – 62135-1 © IEC:2008
CONTENTS
FOREWORD.5
1 Scope.7
2 Normative references .7
3 Terms and definitions.8
4 Environmental conditions.10
5 Tests .10
5.1 Test conditions.10
5.2 Measuring instruments .10
5.3 Type tests .11
5.4 Routine tests .11
6 Protection against electric shock .11
6.1 General .11
6.2 Insulation .12
6.2.1 General .12
6.2.2 Clearances .12
6.2.3 Creepage distances.13
6.2.4 Insulation resistance.14
6.2.5 Dielectric strength .15
6.2.6 Liquid cooling .16
6.3 Protection against electric shock in normal service (direct contact) .16
6.3.1 General .16
6.3.2 Rated no-load voltage at the output .17
6.3.3 Protection provided by barriers or the enclosure.17
6.3.4 Capacitors .17
6.3.5 Automatic discharge of input capacitors.18
6.3.6 Protective conductor current under normal operation.18
6.4 Protection against electric shock in case of a fault condition (indirect contact) .19
6.4.1 General .19
6.4.2 Protective provisions for welding circuit .21
6.4.3 Internal conductors and connections.33
6.4.4 Touch current in fault condition.33
6.4.5 DC resistance welding equipment operating at mains frequency.34
6.4.6 DC resistance welding equipment operating at medium frequency.34
6.4.7 Continuity of the protective bonding circuit .35
6.5 Additional user requirements .35
6.6 Supply voltage.35
6.7 Conductors of the welding circuit.35
7 Thermal requirements.35
7.1 Heating test.36
7.1.1 Test conditions .36
7.1.2 Tolerances of the test parameters .36
7.1.3 Beginning of the heating test .36
7.1.4 Duration of the test.37
7.2 Temperature measurement.37
7.2.1 Measurements conditions .37
7.2.2 Surface temperature sensor .37

62135-1 © IEC:2008 – 3 –
7.2.3 Resistance .37
7.2.4 Embedded temperature sensor.38
7.2.5 Determination of the ambient temperature (t ).38
a
7.2.6 Determination of cooling liquid temperature (t ).38
a
7.2.7 Recording of temperatures .38
7.3 Limits of temperature rise.38
7.3.1 Windings .38
7.3.2 External surfaces.39
7.3.3 Other components .40
8 Abnormal operation .40
8.1 General requirements.40
8.2 Stalled fan test .40
8.3 Cooling system failure .40
8.4 Overload test.41
9 Provisions against mechanical hazards .41
9.1 General .41
9.2 Risk analysis .41
9.2.1 General .41
9.2.2 Ready to use equipment as in delivery state.41
9.2.3 Equipment not ready to use as in delivery state.41
9.2.4 Equipment not ready to use and designed to be incorporated in a
more complex equipment.42
9.3 Measures .42
9.3.1 Minimum measures.42
9.3.2 Additional measures .42
9.4 Conformity of components.43
9.5 Starting for manual operated equipment .43
10 Instructions and markings.44
10.1 Instructions .44
10.2 Markings .44
Annex A (informative) Nominal voltages of supply networks.45
Annex B (normative)  Construction of supply circuit terminals .46
Annex C (informative) Extrapolation of temperature to time of shutdown.48
Annex D (informative) Example of risk analysis and safety level requirement.49
Annex E (informative) Indirect contact protection in resistance welding equipment.53
Bibliography.
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