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The appraisal committee believes that this impact generator is the core equipment of the high current test system. The design and production are difficult and the technical content is high.
In 1987, the former Ministry of Machinery Industry urgently needed a three-phase outlet short-circuit capacity of 6,500 MVA for the development of China's electrical appliance manufacturing industry. Since China has not produced such products, it is intended to be imported for emergency needs. In the technology introduction negotiations, foreign companies believe that China's motor design and manufacturing technology is low, so the price in cooperative production is as high as nearly 10 million US dollars, and its technology is tightly sealed, and it is also blunt: "You can't design this technology very difficult. High special purpose generator".
At that time, the country had few foreign exchange reserves and was unable to pay for this high foreign exchange, and the country urgently needed such a generator. The leader of Harbin Electric Company believes that the factory has many years of experience in designing and manufacturing conventional generators, has a profound theoretical foundation of electric motors, has the ability to innovate and overcome the technical difficulties. Therefore, it decided to undertake the self-developed 6500 MVA impact generator. Mission to meet the urgent needs of the country.
In 1988, Harbin Electric listed the 6500 MVA impact generator as a major development product project. Organize the development team and appoint the responsible persons of design, process, plan, material supply, production organization, installation, liaison, etc. to carry out work. After careful design and careful construction, the 6500 MVA impact generator successfully completed the design and manufacturing tasks, and was officially put into operation in November 2003.
From November 2003, the 6500 MVA impact generator was put into operation, and the number of short circuits accumulated more than 5,000 times, and the maximum peak current value reached 320 kA. There is no abnormality in the winding fixing structure under repeated impact, which proves that the internal and external fixing and shielding structure of the end winding is excellent in design, firm and reliable, and meets the relevant test standards of IEC and GB. Xi'an High Voltage Electric Apparatus Research Co., Ltd. is very satisfied with the performance of this machine and evaluates: The performance of this generator exceeds the world's largest generator of the KEMA high current test station in the Netherlands.
JIS" Stands for Japanese Industrial Standard and are published by the Japanese Standards Association (JSA) which is the equivalent of ANSI in the United States. They are created and updated by the Committee of the Japanese Industrial Standards (JISC). Like JSA to ANSI, the JISC is similar to the American Society of Mechanical Engineers (ASME).
Japan Industrial Standard is yet another option for metric sizes. Provided in JIS5K, JIS10K, JIS15K, and JISK20K pressure classes, we can offer Slip On, Blind, and Weld Neck varieties in Raised Face or Flat Face configurations. These are typically made of 316/L or A105, but as usual, all alloys are available!
Much like DIN / metric flanges, the JIS Flange specification offers a slightly wider variety of slip weld configurations for the purposes of space limitations and suitability for existing pipeline equipment. For instance, a customer can request a slip on with or without a hub as standard, or even a ring type flange, and all of this within the same B2220 specification.
JIS flanges are commonly found in exported pressure equipment and pipe assemblies from Japan. Many large ships and sea vessels which travel through international waters and service the Pacific rim will utilize equipment made to this standard, as parts and servicing for this specification are widely available.
5K Flange,Jis Ff Flange,Jis 5K Flange,Forged Steel Flange
Hebei Welkin Pipe Fitting Manufacturing Co., Ltd , https://www.welkinpipeline.com