Industrial plug socket implementation of standards
A, the international standard
Europe and the United States earlier industrial developed countries in the industrial plug socket in the research, development and production. Has been in place since the 1970 s, European electrical product safety certification, compiled a set of industrial safety standards CEE plug socket 17. 1979 years later, the international electrotechnical commission IEC officially released the IEC 309 - and 79 (industrial plug and socket coupler Part 1: general requirements) and IEC 309-81: in the (industrial plug and socket coupler The second part: take bolt and sets of electrical accessories size interchangeability requirements), became the first international standard of industrial plug socket.
Second, revision and three IEC309 standards. Released in February 1999, the international electrotechnical commission IEC version 4, namely the IEC 60309-1/2. Standard number increase "60" unity, from three to five, this version is a combination of IEC 309-1 version 2 and 3 version of the content of technological change, become the standard of the latest version.
Second, the national standard
In the early 1980 s reform and opening up, the introduction of equipment is supporting the use of IEC 309-1, 2, international standard industrial plug socket. Was not in China with the international standards of the national standard, this kind of product no domestic production, there is a shortage in the market. This not only affects the use of imported equipment, equipment design, manufacturing and exporting in China also. So, according to IEC international standard, formulate corresponding national standards is imperative. On December 21, 1989, the state technical supervision bureau released the GB/T 11918-11919-1989 (industrial plug and socket coupler) national standards, and in July 1, 1990. Equivalent to the standard IEC 309-1, 2.
In order to adapt to the needs of economic and technological development, with the international standard IEC 60309-1, 2, and the 1989 version of the standard was revised in China, and on November 2, 2001, the state administration of quality supervision, inspection and quarantine issued the new national standard GB/T 11918-11919-11918 (industrial plug and socket coupler), and implemented in June 1, 2002. It is equivalent to the IEC 60309-1, 2, wide adaptation, more perfect, further improve product safety and quality, and the international general, meet the needs of both at home and abroad.