IEC 60974-8:2009

IEC 60974-8 ®
Edition 2.0 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 8: Gas consoles for welding and plasma cutting systems

Matériel de soudage à l’arc –
Partie 8: Consoles de gaz pour soudage et systèmes de coupage plasma

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IEC 60974-8 ®
Edition 2.0 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 8: Gas consoles for welding and plasma cutting systems

Matériel de soudage à l’arc –
Partie 8: Consoles de gaz pour soudage et systèmes de coupage plasma

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
Q
CODE PRIX
ICS 25.160 ISBN 978-2-88910-362-1
– 2 – 60974-8 © IEC:2009
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Environmental conditions.7
5 Tests .7
5.1 Test conditions.7
5.2 Measuring instruments .7
5.3 Conformity of components.7
5.4 Type tests .7
5.5 Routine tests .8
5.5.1 External gas console .8
5.5.2 Internal gas console .8
6 Protection against electric shock .8
6.1 Insulation .8
6.2 Protection against electric shock in normal service (direct contact) .8
6.2.1 Protection provided by the enclosure.8
6.2.2 Capacitors .8
6.3 Protection against electric shock in case of a fault condition (indirect contact) .8
7 Thermal requirements.9
7.1 Heating test.9
7.2 Maximum temperature.9
8 Connections for plasma cutting torches .9
9 Mechanical requirements.9
9.1 Protection against fire or explosion.9
9.2 Gas line purging .9
9.3 Enclosure .10
9.3.1 Design requirements.10
9.3.2 Enclosure purging.10
9.3.3 Safe design of gas console.11
9.3.4 Open structure.11
9.3.5 Solid filled enclosure .11
9.4 External gas console .11
9.5 Internal gas console .12
10 Gas lines .12
10.1 Gas hoses and tubing.12
10.2 Gas fittings.12
10.3 Leak test .12
11 Control circuits .13
12 Rating plate.13
12.1 External gas console .13
12.2 Internal gas console .13
13 Instructions and markings.14
13.1 Instructions .14
13.2 Marking .14

60974-8 © IEC:2009 – 3 –
Annex A (informative) Mechanized plasma system diagram .15
Annex B (informative) Example of a rating plate layout .16
Bibliography.17

Figure A.1 – Example of a mechanized plasma system .15
Figure B.1 – Principle of a rating plate .16

Table 1 – Colour coding and marking.12

– 4 – 60974-8 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
ARC WELDING EQUIPMENT –
Part 8: Gas consoles for welding and plasma cutting systems

FOREWORD
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...