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.
In the frequency range from 30 MHz to 6 GHz, the antenna(s) used shall be as specified in CISPR 1 6-1 -4:201 9. Measurements shall be made for both horizontal and vertical polarization. On an OATS or in a SAC, the nearest point of the antenna(s) to the ground shall be not less than 0,25 m. For measurements in a FAR, the antenna height is fixed at the geometrical middle height of the validated test volume.
4.6 Coupling/decoupling network (CDN)
If a shielded chamber is required and the load is situated outside the shielded chamber, a load-decoupling network connected to the outside load via suitable RF filters shall be used inside the chamber. A 1 50 Ω CDN AF 2, as specified in IEC 61 000-4-6:201 3, suitable for the respective load current and voltage, shall be used. The RF-port of the CDN shall be terminated with 50 Ω. Any suitable coupling devices specified in CISPR 1 6-1 -2:201 4 and CISPR 1 6- 1 -2:201 4/AMD1 :201 7 may be used for the conducted emission assessment of signal, control or measurement ports.
5 Test set-up for emission and immunity
5.1 General Emission and immunity testing of equipment that is not PORTABLE shall be carried out on equipment configured in accordance with Figure 2. For PORTABLE equipment, either the test set-up given in Figure 2 or the test set-up given in Figure 3 shall be used. Arc welding equipment tested in one of these configurations shall be considered to have met the necessary requirements of this document. For the measurement of the output current ripple, there are no specific requirements for the equipment configuration.IEC 60974-10 pdf download.