BS EN IEC 60974-5:2019 pdf free.Arc welding equipment.
The WIRE FEEDER motor shall be loaded to provide a current corresponding to the MAXIMUM LOAD in accordance with 11.7 for all tests. WIRE FEEDERS designed for use with manual torches shall be capable of operating at rated welding current at 60 % duty cycle (6 min “on” and 4 min “off”) without causing any component to exceed its rated temperature. WIRE FEEDERS designed for use with mechanically guided torches shall be capable of operating at rated welding current at 100 % duty cycle without causing any component to exceed its rated temperature. Where a WIRE FEEDER and a power source are housed in a single enclosure, the WIRE FEEDER shall be capable of operating at the duty cycle corresponding to the rated maximum welding current of the power source. For liquid-cooled apparatus, the test shall be carried out with the minimum flow and with the maximum temperature of the coolant, as recommended by the manufacturer. Additionally, the WIRE FEEDER shall meet the requirements specified in the first five paragraphs of Clause 9 when it is cycled for 4 s “on” and 2 s “off” during the 6 min “on” time of the duty cycle specified in the second paragraph of Clause 9. Current-carrying components shall be capable of carrying the rated welding current without causing the external surface temperatures of the WIRE FEEDER specified in Table 7 of IEC 60974-1:2017 to be exceeded. External surface temperatures in restricted access areas, e.g. robotic applications, or covered areas in normal use, e.g. welding circuit, may exceed the limits of Table 7 of IEC 60974-1:2017 up to a rise of 60 K over ambient temperature, if marked with the following symbol IEC 60417-504 1:2002-10:A stand-alone WIRE FEEDER which relies on motor-driven fan(s) for conformity with the tests of Clause 9 shall neither breakdown nor increase the risk of electric shock or fire, under the conditions of operation of 10.2. These tests are conducted without regard to temperature attained on any part, or to the continued proper functioning of the WIRE FEEDER. The only criterion is that the WIRE FEEDER does not become unsafe. These tests may be conducted on any WIRE FEEDER that functions correctly.BS EN IEC 60974-5 pdf download.