IEC 60974-1-2005 pdf – Arc welding equipment – Part 1: Welding power sources.
1 Scope This part of IEC 60974 is applicable to power sources for arc welding and allied processes designed for industrial and professional use, and supplied by a voltage not exceeding that specified in Table 1 of IEC 60038, or driven by mechanical means. This part of IEC 60974 specifies safety and performance requirements of welding power sources and plasma cutting systems. This part of IEC 60974 is not applicable to welding power sources for manual metal arc welding with limited duty operation which are designed mainly for use by laymen. This part of IEC 60974 is not applicable to testing of power sources during periodic maintenance or after repair. NOTE 1 Typical allied processes are electric arc cutting and arc spraying. NOTE 2 This part of IEC 60974 does not include electromagnetic compatibility (EMC) requirements. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60038, IEC standard voltages IEC 60050(151), International Electrotechnical Vocabulary (IEV) – Part 151: Electrical and magnetic devices IEC 60050(851), International Electrotechnical Vocabulary (IEV) – Chapter 851: Electric welding IEC 60112, Method for the determination of the proof and the comparative tracking indices of solid insulating materials IEC 60245-6, Rubber insulated cables – Rated voltages up to and including 450/750 V – Part 6: Arc welding electrode cables IEC 60309-1, Plugs, socket-outlets and couplers for industrial purposes – Part 1: General requirements IEC 60417-DB:2002 2 , Graphical symbols for use on equipment
IEC 60445, Basic and safety principles for man-machine interface, marking and identification – Identification of equipment terminals and of terminations of certain designated conductors, including general rules for an alphanumeric system IEC 60529, Degrees of protection provided by enclosures (IP Code) IEC 60664-1:1992, Insulation coordination for equipment within low-voltage systems – Part 1: Principles, requirements and tests 3 Amendment 1 (2000) Amendment 2 (2002) IEC 60664-3, Insulation coordination for equipment within low-voltage systems – Part 3: Use of coating, potting or moulding for protection against pollution IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical flame test methods IEC 60974-7, Arc welding equipment – Part 7: Torches IEC 60974-12, Arc welding equipment – Part 12: Coupling devices for welding cables IEC 61140, Protection against electric shock – Common aspects for installation and equipment IEC 61558-2-4, Safety of power transformers, power supply units and similar – Part 2-4: Particular requirements for isolating transformers for general use IEC 61558-2-6, Safety of power transformers, power supply units and similar – Part 2-6: Particular requirements for safety isolating transformers for general use CISPR 11, Industrial, scientific and medical (ISM) radio-frequency equipment – Electro- magnetic disturbance characteristics – Limits and methods of measurement
3.3 expert competent person, skilled person a person who can judge the work assigned and recognize possible hazards on the basis of professional training, knowledge, experience and knowledge of the relevant equipment NOTE Several years of practice in the relevant technical field may be taken into consideration in assessment of professional training. 3.4 instructed person person informed about the tasks assigned and about the possible hazards involved in neglectful behaviour NOTE If necessary, the person has undergone some training. 3.5 type test test of one or more devices made to a given design to check if these devices comply with the requirements of the standard concerned 3.6 routine test test made on each individual device during or after manufacture to check if it complies with the requirements of the standard concerned or the criteria specified 3.7 visual inspection inspection by eye to verify that there are no apparent discrepancies with respect to provisions of the standard concerned 3.8 drooping characteristic external static characteristic of a welding power source which, in its normal welding range, is such that the negative slope is greater than or equal to 7 V/100 A 3.9 flat characteristic external static characteristic of a welding power source which, in its normal welding range, is such that, as the current increases, the voltage either decreases by less than 7 V/100 A or increases by less than 10 V/100 A