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BS EN IEC 60974-2:2019

BS EN IEC 60974-2:2019

$142.49

Arc welding equipment – Liquid cooling systems

Published By Publication Date Number of Pages
BSI 2019 24
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IEC 60974-2:2019 specifies safety and construction requirements for industrial and professional liquid cooling systems used in arc welding and allied processes to cool torches. This document is applicable to liquid cooling systems which are stand-alone (separate from the welding equipment) or built-in (housed in a single enclosure with other welding equipment). This fourth edition cancels and replaces the third edition published in 2013 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) changes induced by the publication of IEC 60974-1:2017; b) reference in 11.1 changed.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
6 Annex ZZ (informative)Relationship between this European standard and the safety objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be covered
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
3 Terms and definitions
12 4 Environmental conditions
5 Tests
5.1 Test conditions
5.2 Measuring instruments
5.3 Conformity of components
5.4 Type tests
5.5 Routine tests
13 6 Protection against electric shock
6.1 Insulation
6.1.1 General
6.1.2 Clearances
6.1.3 Creepage distances
6.1.4 Insulation resistance
6.1.5 Dielectric strength
6.2 Protection against electric shock in normal service (direct contact)
6.3 Protection against electric shock in case of a fault condition (indirect contact)
6.3.1 Protective provisions
6.3.2 Isolation between windings of the supply circuit and the welding circuit
6.3.3 Internal conductors and connections
6.3.4 Touch current in fault condition
6.4 Connection to the supply network
6.4.1 Supply voltage
14 6.4.2 Multi-supply voltage
6.4.3 Means of connection to the supply circuit
6.4.4 Marking of terminals
6.4.5 Protective circuit
6.4.6 Cable anchorage
6.4.7 Inlet openings
6.4.8 Supply circuit on/off switching device
6.4.9 Supply cables
6.4.10 Supply coupling device (attachment plug)
6.5 Leakage current between welding circuit and protective earth
15 7 Mechanical provisions
7.1 General
7.2 Cooling liquid overflow
7.3 Hose coupling devices and hose connections
8 Cooling system
8.1 Rated maximum pressure
Figures
Figure 1 – Leakage current measurement configuration
16 8.2 Thermal requirements
8.2.1 Heating test
8.2.2 Tolerances of test parameters
8.2.3 Duration of test
8.3 Pressure and temperature
9 Abnormal operation
9.1 General requirements
17 9.2 Stalled test
10 Cooling power
18 11 Rating plate
11.1 General
11.2 Description
Figure 2 – Measuring circuit for determination of the cooling power
Table 1 – Example of cooling liquid data at 60 (C
19 11.3 Contents
Figure 3 – Principle of the rating plate of stand-alone cooling systems
20 11.4 Tolerances
12 Instructions and markings
12.1 Instructions
21 12.2 Markings
12.2.1 General
12.2.2 Inlet and outlet
12.2.3 Pressure warning
22 Annex A (informative)Example diagram of built-in and stand-alone liquid cooling systems
Figure A.1 – Example diagram of built-in liquid cooling systems
Figure A.2 – Example diagram of stand-alone liquid cooling systems
23 Annex B (informative)Example for a rating plate of stand-alone cooling system
Figure B.1 – Single-phase stand-alone cooling unit

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BS EN IEC 60974-2:2019
$142.49