International electrotechnical Commission

The international electrotechnical Commission ( CEI ) or International Electrotechnical Commission (IEC) in English, is a treating organization of standardization of the fields of electricity, electronics and the related techniques. The majority of its standards are developed jointly with the International organization of standardization (ISO).

The CEI is made up representatives of various national organizations of standardization. The CEI was created in 1906 and currently counts 68 participating countries. Standards CEI are recognized in more than 100 pays.
Originally located at London, the commission joined its current general headquarters of Geneva in 1948. The CEI has three regional centres with Singapore, São Paulo and Worcester (Massachusetts).

The CEI was the instrument of the development and the distribution of standards of measuring units, in particular the gauss, the hertz, and the weber. It also contributed to propose a whole of references, the Système Giorgi, who finally was integrated into the international Système of units (IF).

In 1938, it published a vocabulary translated and international in order to unify the electric terminology. This effort perdure, and the international electrotechnical vocabulary remains an important contribution in electric and electronic industries.

History

The first meeting of the CEI was held June 26th and 27th 1906 under the presidency of Alexander Siemens. Last nine countries had as of 1905 expressed their will to join the CEI in order to establish standards in the field of the electrotechnical ones: the United Kingdom, the United States, France, Italy, Canada, Germany, Austria, Denmark, Sweden and Norway. Moreover, other countries had sent representatives: Belgium, Holland, Japan and Espagne.
Although one regards 1906 as the year of birth of the CEI, from the discussions on standardization had already begun as of 1904 with Saint-Louis (Missouri) at the time of an international congress. With this congress, 15 countries had been committed cooperating by creating a representative commission charged to take into account the question of the standardization of the nomenclatures and values assigned for the apparatuses and machines électriques.
The first president of the CEI was Lord Kelvin, well-known for his work in the field of the Thermodynamique and which introduced the concept of the absolute zero of temperature.

Membership

To be member of the CEI is reserved to the recognized national organizations of standardization. The organizations members include in particular:

Interest of standards CEI

The purpose of the establishment of standards CEI is of:
  • to facilitate the exchanges in the world to remove the technical barriers of them;
  • to ensure the quality of the products;
  • to guarantee the interworking of the products and systems;
  • to contribute to safety in the use of the products;
  • to contribute to environmental protection and quality of life.

Establishment of standards CEI

The standards are established by experts gathered in international work groups and which represent the manufacturers, users of materials, as well as representatives of laboratories of tests, consultants and academics specialists in the considéré.
field These experts are elected by their national committee, they are charged to write projects which are subjected to the vote of the national committees CEI and which are adopted as international standards when that the majority of positive votes necessary is obtained (in general a majority of the 2/3).

Study committees CEI

The field covered by the CEI is very vast because it goes from the large materials (alternators, transformers, turbines.) with the audio-video material, lamps. , while passing by the washing machines and the medical device. Consequently, work of standardization is carried out by more than 110 study committees (EC) specialized for each application. The EC 14 deals with the Transformateur S, the EC 17 of the Switchgear, the EC 28 of coordination of insulation, the EC 36 of the Isolateur S etc

Standards of the CEI

End 2006, there are 5613 standards CEI which cover all the fields of electrical engineering, 497 new standards were published in 2006.

Standards CEI are numbered, and their titles take a form such: IEC 60411 Graphical Symbols .

The standards developed jointly with the ISO use classification ISO, such: ISO/IEC 7498-1: 1994 Open Systems Interconnection: BASIC Refer Model .
The committee unites ISO/CEI n° 1, ISO/IEC Joint Technical Committee 1 (ISO/IEC JTC1) is described in the article concerning the ISO.

Brief list of standards CEI:

  • ISO/CEI 10646 Technologies information - universal Play of natures coded on several bytes (Unicode)
  • CEI 60027 Letter symbols to use in electrical engineering
  • CEI 60063 Series of normal values for resistances and condensing
  • CEI 60071 Coordination of insulation (tests shocks of the lightning, etc)
  • CEI 60757 Code of the colors of location of resistances
  • CEI 60807 rectangular Connectors used to the frequencies lower than 3 MHz (SUB-D, HE10, etc)
  • IN /electromagnetic CEI 61000 Compatibility (CEM)
  • CEI 61131 programmable Automats
    • CEI 61131-3 programmable Automats - Part 3: Computer programming languages
  • CEI 61158 numerical Communications for the order and systems of measurement - Buses of ground used in the industrial control devices
  • CEI 61851 System of conductive load for electric vehicles
  • CEI 62271 Switchgear with high-tension (circuit breakers…)

See too

External bonds

  • History of the CEI (official site)
  • Official site of the CEI
  • international electrotechnical Vocabulary
  • http://tc17.iec.ch/ Site Committee Studies 17, Switchgear

Zh-min-nan: IEC

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