IEC 61547-2020 Equipment for general lighting purposes – EMC immunity requirements.
4 Performance criteria
For the various immunity tests that apply, the performance of the following functions shall be assessed, as far as applicable or specified by the manufacturer:
– the luminous intensity of the Iuminaire or of the light source(s);
– the control function, for example on/off switching, light level setting, colour adjustment,wireless control.
For these functions, three different levels of performance criteria are specified in 4.2. The functions assessed and the performance criteria for each individual test shall be noted in the test report.
The effects of electromagnetic disturbances on the life of the equipment under test are excluded from this document.
4.2 Categorization of performance criteria
The following three categories of performance criteria apply.
a) Performance criterion A During the test, no change of the Iuminous intensity shall be observed and the regulating control, if any, shall operate during the test as intended.
b) Performance criterion B
During the test, the Iuminous intensity may change to any value. After the test, the Iuminous intensity shall be restored to its initial value within 1 min (30 min for high pressure gas discharge lamps). Regulating controls need not function during the test, but after the test, the mode of the control shall be the same as before the test, provided that during the test no mode changing commands were given.
c) Performance criterion C
During and after the test, any change of the luminous intensity is allowed and the light source(s) may be extinguished. After the test, within 30 min, all functions shall return to normal, if necessary by temporary interruption of the mains supply and/or operating the regulating control.
The following additional requirement applies to lighting equipment incorporating a starting device: after the test, the lighting equipment is switched off for 30 min and back on again. The lighting equipment shall start and operate as intended.
The application of the different performance criteria for the various types of tests and for different lighting equipment are specified in Clause 6.
4.3 Objective assessment of luminous intensity performance
A change of luminous intensity shall be checked by either one of the following requirements:
• no change of luminous intensity by visual observation, or
• the luminous intensity of a lighting equipment by measurement.
When being measured, the luminous intensity of lighting equipment shall be measured by means of an illuminance (lux) meter which is positioned in an axis perpendicular to the main plane of the lighting equipment, in its centre and at a distance for proper operation of the lux meter. The luminous intensity shall be deemed to be unchanged if the measured intensities during and after the test do not deviate by more than 1 5 %. In stand-by mode the change of the luminous intensity shall be less than 5 % of the maximum luminous intensity (1 00 % light output).
Care shall be taken to ensure the ambient light level does not influence the measurement results.
Precautions to achieve reproducible results given in the relevant light source performance standards shall be observed.
5 Test specifications
Immunity requirements for lighting equipment are specified in 5.2 to 5.8 on a port by port basis for the following disturbances:
– electrostatic discharges;
– continuous and transient disturbances;
– radiated and conducted disturbances;
– mains supply-related disturbances.IEC 61547 pdf download.