Harmonic standard IEC 61000-3-2 is changed! Interpretation of lighting part (with case analysis)

Date：2020/10/16　　Clicks：1230

Recently, the International Electrotechnical Commission (International Electro technical Commission, referred to as IEC) released the latest revision of the IEC 61000-3-2 standard, Edition 5.1, IEC 61000-3-2:2018+A1:2020, and the release date of the new standard is 2020 July 14, 2015, the stable time is 2023.

This standard involves the limitation of harmonic current injected into the public power distribution system. It is applicable to electrical and electronic equipment with an input current of no more than 16A per phase to be connected to the public power distribution system. For the nominal voltage less than 220V (phase voltage ) The limit of the system has not been considered.

Among them, lighting equipment (except for special products) belongs to Class C equipment specified in the standard, and Class C limits apply.

This standard is a revised version based on IEC 61000-3-2:2018. Compared with the old version, the main technical changes are as follows:

• Revised the definitions related to lighting equipment in Chapter 3;

• Deleted the selection principle of the 10% deviation between the rated power specified by the manufacturer and the actual test power in the chapter "6.3.2 Test Procedure";

• Added Chapter 6.5 Test Instructions for Multifunctional Equipment;

• Modified the limits for Class C lighting equipment in Table 2 and changed the third harmonic current limit from 30λ to 27;

• Added Chapter 8 standard compliance;

• Modified Appendix B.5 test conditions for lighting equipment, pointing out the test conditions for passive equipment exemption testing and multi-function lighting equipment;

• Add the calculation method of Appendix C POHC;

1. Fan lights, speaker lights, etc.-belong to the equipment that each function works independently. During the test, the fan function or the audio function and the lighting function work separately, and are assessed according to the A and C limits.

2. Range hoods equipped with auxiliary lights, refrigerators with TVs on the doors, etc. are equipment with main functions and auxiliary functions. The test should be performed when all functions are turned on (if possible) according to the corresponding limit requirements of the main functions , That is, carry out harmonic test in accordance with Class A equipment.

——If the luminaire has additional independent functions that do not interact with the lighting function, and it belongs to Class A or Class D, test each function to make it meet the corresponding limit separately. For multifunctional lighting equipment that is not clear how to operate independently without modifying the lamp, the manufacturer can provide operating instructions to test how to operate each independent function individually.

——If the test instructions are not provided or the equipment cannot be tested when each function is running separately, or if the additional function belongs to category A or category D lighting equipment that intentionally interacts with the lighting function, if the equipment complies with C when all functions are running at the same time The equipment meets the requirements of this standard.

Note 1: For example, other functions can be turned off or standby through other settings.

Note 2: For example, a surveillance camera, when the light is off, it will also be active.

Note 3: For example, a motion sensor that controls the light output of lighting equipment.

The EU version of the standard EN IEC 61000-3-2 is still under further revision, and the latest version corresponding to the IEC has not been released yet. It is expected that EN IEC 61000-3-2: 2019+A1:2020 will be released on April 19, 2021. .