What are the four major types of EMC standard systems? China's EMC automotive related standards

As the electrification of automobiles develops faster and faster, more and more electronic devices are installed in vehicles, and EMC becomes more and more important. How to judge the EMC performance of test parts? What are the international standards, regional standards, and Chinese standards?

In simple terms, the EMC standard system is divided into four categories: international standards, regional standards, Chinese standards, and corporate standards. 1. International EMC standards There are three world-recognized authoritative standardization organizations: 1) IEC (International Electrotechnical Commission): It has several technical committees, among which the main ones engaged in EMC are CISPR (International Special Committee on Radio Interference), TC77 (Technical Committee 77) and other related technical committees. 2) ISO (International Organization for Standardization): Founded in 1947, a non-governmental organization headquartered in Geneva, Switzerland. The main publisher of automotive electromagnetic compatibility standards. 3) ITU (International Telecommunication Union): An intergovernmental organization headquartered in Geneva, Switzerland.

Any sovereign state of the United Nations can become a member of the ITU. Currently, the two most widely used standard systems in automobiles are IEC and ISO (IEC standards have been widely adopted by Europe, the United States, Japan, China and other regions and countries). The relevant systems are as follows:

▲ IEC standard automotive EMC related

▲ ISO standard automotive EMC related

2. Regional EMC standards

Regional EMC standards are usually derived from international standards, and the relevant organizations are as follows: 1) CENELEC (European Committee for Electrotechnical Standardization) Authorized by the European Commission to formulate European standards EN. EN standards reference many CISPR and IEC standards, and their corresponding relationships are as follows: EN55××× = CISPR standard, (e.g.: EN55011 = CISPR Pub.11) EN6×××× = IEC standard, (e.g.: EN61000-4-3 = IEC61000-4-3 Pub.11) EN50××× = CENELEC self-defined standard, (e.g.: EN50801) 2) ANSI (American National Standards Institute) 3) FCC (Federal Communications Commission) Mainly formulates standards for civilian products, and the standards for electromagnetic compatibility are mainly included in FCC Part15 and FCC Part18. 4) VCCI (Voluntary Control Council for Interference) A private organization, whose standards are consistent with CISPR and IEC. 3. China EMC standards China's EMC standards are usually derived from international standards, most of which are equivalent to or modified from IEC (IEC/CISPR, IEC/TC77) and ITU-T recommendations. Its related organizations and standard systems are as follows:

▲ China Standards Organization

1) SAC/TC79 (National Technical Committee for Radio Interference Standardization) Organizes the formulation, revision and review of national standards, and carries out work corresponding to IEC/CISPR. Currently, it has 6 subcommittees corresponding to the various branches of CISPR. 2) SAC/TC114 (National Automobile Standardization Committee) 3) SAC/TC246 (National Technical Committee for Electromagnetic Compatibility Standardization) Mainly responsible for coordinating the domestic unified work of IEC/TC77; promoting the national standard formulation and revision work corresponding to the IEC61000 series of EMC standards. MIL-STD (US military standard): The typical one is MIL-STD –461x; 4) GB (Chinese national standard) Basically adopts CISPR and IEC standards, and currently 86 have been released (50 from SAC/TC79, 36 from SAC/TC246); 5) GJB (Chinese military standard) Basically adopts US military standards, for example, GJB151A = MIL-STD -461D;

▲ China EMC automotive related standards

4. Enterprise EMC standards Different enterprises carry out targeted updates according to international standards and national standards, and formulate EMC standards that meet their own enterprise requirements. Domestic enterprises usually revise their enterprise standards based on national standards.

▲ Domestic automobile enterprise EMC related standards (for reference only)

Appendix IEC organizational structure:

▲ IEC/CISPR organizational structure