1, JB500-1964 transformer public standard The JB500-1964 transformer process standard was the ministerial standard of the former Ministry of Machinery Industry in 1964. Its performance data is comparable to the original Soviet national standard IOCT401-1941. This series of transformers has high loss and low efficiency. It is called a high-energy-consumption transformer and has been eliminated and is no longer used. In order to understand the development history of transformer technology performance, the technical performance of the partial capacity of SJL6 and 1OkV series transformers designed according to this standard is listed in Table 2-1 for reference. 2. CB1094-1971, CB1094-1979, JB1300-1304-1973 standard GB1094-1971 transformer process standard is the national standard revised in 1971. Later it was changed to GBID94-1979, the technical performance of the product complies with the ministerial standard JB1300-1304-1973 (three-phase oil-immersed power transformer drop parameters and technical requirements). The technical performance of this series of transformers is much improved compared to JB500-1964. It is called medium loss transformer and was eliminated in the early 1980s. 3. GB1094*1~5-1985 and GB6451*1~5-1986 national standards Since 1979, China's transformer industry has identified new targets for small and medium-sized transformers, and has begun to design energy-saving and low-voltage transformers. The joint design was completed in 1981, and the prototype was made in 1982. So we have established 10~35kV national unified design SL7 and SLZ, low loss transformers, as a national promotion project. lOkV level The no-load loss of the transformer is reduced by about 40% compared to the high-energy SJL series transformers manufactured according to JB500-1964. At the same time, the load loss is also reduced by more than 10%, called a low-loss transformer, into an energy-saving transformer. The main measures for reducing the loss of iron core material used is cold rolled grain oriented silicon steel sheet, steel sheet good performance, loss of small units. And improve the iron core production process, that is, the use of 45-degree oblique joints, as far as possible to make the magnetic flux along the silicon steel sheet rolling direction 45 degrees through the core joint, thereby greatly reducing the no-load current. At the same time, the core is not punched, and the structure of the tie is used to improve the utilization of the core. Moreover, the silicon steel sheet is not painted, and the insulation film of the silicon steel sheet itself is used to reduce the gap between the silicon steel sheets. When the silicon steel sheet is sheared, the burr is strictly avoided, and the joint of the core is smooth and tight, thereby achieving the goal of reducing the no-load loss and the no-load current. Since the utilization of the core is improved, the volume of the core is reduced, the coil is reduced, and the load loss is also reduced. On the basis of the development of S7 low-loss transformer, China issued a new transformer process standard GB1094·1-5-1985 and a new oil-immersed transformer technical parameter GB6451·1~5-1986, which is the S7 transformer from 1985 to 1986. National standard. This standard has also been phased out. Linear Slide Module,Linear Guide Systems,Miniature Linear Guide,Linear Slide Guide Rail Guangdong TICO Automation Technology Co.,Ltd. , https://www.tico-robots.com