IEC 60974-10-2020 Arc welding equipment – Part 10: Electromagnetic compatibility (EMC) requirements

IEC 60974-10-2020 Arc welding equipment – Part 10: Electromagnetic compatibility (EMC) requirements. 4 General test requirements 4.1 Test conditions Tests shall be carried out on completely assembled equipment representative of the series production. Tests shall be performed within the specified operating conditions given in IEC 60974-1 :201 7 and IEC 60974-1 :201 7/AMD1 :201 9 or IEC 60974-6:201 5, and at the rated supply voltage and frequency. Results obtained for RF emission and immunity at 50 Hz are valid for the same model operating at 60 Hz and vice versa. Where this document gives options for testing particular requirements with a choice of test methods, compliance can be shown against any of the test methods, using the specified limits with the restrictions provided in the relevant tables. Identical units may be used for testing in parallel. In this case, this information shall be recorded in the test report. 4.2 Measuring instruments The measuring equipment shall comply with the requirements of CISPR 1 6-1 -1 :201 9 and the standards referred to in Table 6, Table 7 and Table 8 as applicable. 4.3 Artificial mains network Measurement of the mains terminal disturbance voltage shall be made using an artificial mains network, if commercially available, consisting of 50 Ω/50 µH or 50 Ω/50 µH + 5 Ω V- network as specified in CISPR 1 6-1 -2:201 4 and CISPR 1 6-1 -2:201 4/AMD1 :201 7. The artificial network is required to provide a defined impedance at RF across the mains supply at the point of measurement and also to provide for isolation of the equipment under test from ambient noise on the power lines. 4.4 Voltage probe A voltage probe as specified in CISPR 1 6-1 -2:201 4 and CISPR 1 6-1 -2:201 4/AMD1 :201 7 shall be used when the artificial mains network cannot be used. The probe is connected sequentially between each line and the reference earth. The probe shall consist of a blocking capacitor and a resistor such that the total resistance between the line and earth is at least 1 500 Ω. The effect on the accuracy of measurement of the capacitor or any other device which may be used to protect the measuring receiver against dangerous currents shall be either less than 1 dB or allowed for in calibration. 4.5 Antennas In the frequency range from 30 MHz to 6 GHz, the antenna(s) used shall be as...