(1) Low-voltage standard closed busbar: If the closed wiring (also called plug-in busbar or dense busway) is used for the engineering wiring, the corresponding transformer can provide standard closed busbar terminal to facilitate the connection with the external busbar.
With housing (IP20), the enclosed busbar flange is provided on the top cover of the housing; without the outer casing (IP00), only the closed busbar terminal block is provided.
(2) Low-voltage standard horizontal side outlet: When the transformer is placed side by side with the low-voltage power distribution panel, in order to facilitate the connection between the terminals, the transformer can provide a low-voltage horizontal side outlet, which is usually matched with low-voltage screens such as GGD, GCK, and MNS. The transformer factory and the switch factory shall sign the interface with the minutes, confirm the detailed dimensions of the interface, and ensure the smooth installation on site.
(3) Low-voltage standard vertical row side outlet line: similar to the horizontal row side outlet line, when the busbars such as the domino screen are vertically arranged, the transformer can provide the low-voltage vertical row side outlet.
At present, the annual output of China's resin-insulated dry-type transformers has reached 10,000 MVA, making it one of the countries with the largest production and sales volume of dry-type transformers in the world. With the low noise (the distribution transformer noise below 2500KVA has been controlled within 50DB) and the promotion of SC(B)9 series with energy saving (no-load loss reduction of 25%), the performance index and manufacturing of dry-type transformers in China Technology has reached the world's advanced level.
Organized by China Building Standard Design Institute, edited by China Textile Industry Design Institute and edited by Shunde Special Transformer Factory, the National Building Standard Design Atlas "Dry Transformer Installation" has been compiled and published, and approved by the Ministry of Construction. The number is "99D268". It is publicly issued by the provincial and municipal architectural design standards. The Atlas provides dry-type transformer layout and installation methods for various places. For the interface of transformers and low-voltage PC screens, various options are listed for design and construction.
With the popularization and application of dry-type transformers, its manufacturing technology has also made considerable progress. It can be predicted that the future dry-type transformers will be further developed in the following aspects.
(1) Energy-saving and low-noise: With the introduction of new low-cost silicon steel sheets, foil winding structures, stepped core joints, environmental protection requirements, in-depth study of noise, and computer optimization design, new materials, new processes, and new technologies are introduced. Will make future dry-type transformers more energy-efficient and quieter.
(2) High reliability: Improving product quality and reliability will be the unremitting pursuit of people. In the electromagnetic field calculation, wave process, casting process, hot spot temperature rise, partial discharge mechanism, quality assurance system and reliability engineering, a lot of basic research is carried out, and reliability certification is actively carried out to further improve the reliability and service life of dry-type transformers.
(3) Environmental characteristics certification: Based on the European standard HD464, the weather resistance (C0, C1, C2), environmental resistance (E0, E1, E2) and fire resistance (F0, F1, F2) characteristics of dry-type transformers are studied. And certification.
(4) Large capacity: from 50 to 2500KVA distribution transformer-based dry-type transformers, expanding to 10000～20000KVA/35KV power transformers. With the increasing urban power load, the urban network substation is getting deeper and deeper into the city. Central area, residential areas, large factories and mines and other load centers, 35KV large capacity community center power transformers will be widely used.
(5) Multi-functional combination: from a single transformer to a multi-functional combined transformer with air-cooled, protective casing, temperature computer interface, zero-sequence transformer, power metering, enclosed busbar and side outlet.
(6) Development in many fields: from distribution transformers to transformers, excitation transformers, metro traction rectifier transformers, high-current electric furnace transformers, nuclear power plants, marine and oil production platforms, etc. .
Among them, dry traction transformers for urban subways and rail transits have three levels of voltages of 10, 20 and 35KV, with capacities of 800, 2500 and 3300 KVA. To reduce harmonic pollution, from 12-pulse rectification to 24-pulse Rectification; the world's largest excitation transformer for the 84000KW generator in the Three Gorges of the Yangtze River has been successfully developed by Shunde Plant and passed the national acceptance.
With housing (IP20), the enclosed busbar flange is provided on the top cover of the housing; without the outer casing (IP00), only the closed busbar terminal block is provided.
(2) Low-voltage standard horizontal side outlet: When the transformer is placed side by side with the low-voltage power distribution panel, in order to facilitate the connection between the terminals, the transformer can provide a low-voltage horizontal side outlet, which is usually matched with low-voltage screens such as GGD, GCK, and MNS. The transformer factory and the switch factory shall sign the interface with the minutes, confirm the detailed dimensions of the interface, and ensure the smooth installation on site.
(3) Low-voltage standard vertical row side outlet line: similar to the horizontal row side outlet line, when the busbars such as the domino screen are vertically arranged, the transformer can provide the low-voltage vertical row side outlet.
At present, the annual output of China's resin-insulated dry-type transformers has reached 10,000 MVA, making it one of the countries with the largest production and sales volume of dry-type transformers in the world. With the low noise (the distribution transformer noise below 2500KVA has been controlled within 50DB) and the promotion of SC(B)9 series with energy saving (no-load loss reduction of 25%), the performance index and manufacturing of dry-type transformers in China Technology has reached the world's advanced level.
Organized by China Building Standard Design Institute, edited by China Textile Industry Design Institute and edited by Shunde Special Transformer Factory, the National Building Standard Design Atlas "Dry Transformer Installation" has been compiled and published, and approved by the Ministry of Construction. The number is "99D268". It is publicly issued by the provincial and municipal architectural design standards. The Atlas provides dry-type transformer layout and installation methods for various places. For the interface of transformers and low-voltage PC screens, various options are listed for design and construction.
With the popularization and application of dry-type transformers, its manufacturing technology has also made considerable progress. It can be predicted that the future dry-type transformers will be further developed in the following aspects.
(1) Energy-saving and low-noise: With the introduction of new low-cost silicon steel sheets, foil winding structures, stepped core joints, environmental protection requirements, in-depth study of noise, and computer optimization design, new materials, new processes, and new technologies are introduced. Will make future dry-type transformers more energy-efficient and quieter.
(2) High reliability: Improving product quality and reliability will be the unremitting pursuit of people. In the electromagnetic field calculation, wave process, casting process, hot spot temperature rise, partial discharge mechanism, quality assurance system and reliability engineering, a lot of basic research is carried out, and reliability certification is actively carried out to further improve the reliability and service life of dry-type transformers.
(3) Environmental characteristics certification: Based on the European standard HD464, the weather resistance (C0, C1, C2), environmental resistance (E0, E1, E2) and fire resistance (F0, F1, F2) characteristics of dry-type transformers are studied. And certification.
(4) Large capacity: from 50 to 2500KVA distribution transformer-based dry-type transformers, expanding to 10000～20000KVA/35KV power transformers. With the increasing urban power load, the urban network substation is getting deeper and deeper into the city. Central area, residential areas, large factories and mines and other load centers, 35KV large capacity community center power transformers will be widely used.
(5) Multi-functional combination: from a single transformer to a multi-functional combined transformer with air-cooled, protective casing, temperature computer interface, zero-sequence transformer, power metering, enclosed busbar and side outlet.
(6) Development in many fields: from distribution transformers to transformers, excitation transformers, metro traction rectifier transformers, high-current electric furnace transformers, nuclear power plants, marine and oil production platforms, etc. .
Among them, dry traction transformers for urban subways and rail transits have three levels of voltages of 10, 20 and 35KV, with capacities of 800, 2500 and 3300 KVA. To reduce harmonic pollution, from 12-pulse rectification to 24-pulse Rectification; the world's largest excitation transformer for the 84000KW generator in the Three Gorges of the Yangtze River has been successfully developed by Shunde Plant and passed the national acceptance.
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