Product Specifications
| Markets: |
South America,Southeast Asia,Africa,Mid East |
| Type: |
Transformer |
| Phase: |
Three |
Product Description
220 110 66 kV series power transformer
Features:
1) Amount of local discharged: The apparent discharge amount is less than 80PC under 1.5 times of rated voltage;
2) Noise: Products of 63MVA and below is lower than 58 dB (AN);
3) Power loss: No-load loss is 30% lower than that of IEC standard;
4) Reliability: All in-service products have no damages or oil leakage occurred;
Application:
60 ~220 kV power system of power plant, substation, mining enterprise and etc.
Technologies:
Design: Relative developed software are adopted in Electromagnetic calculations, strength analysis, leakage magnetic distribution, its electro-dynamic force and electrical insulation.
Manufacture:
1) The core is made of high-permeable grain-orientated top quality cold-rolled silicon sheet and the material is cut with advanced Germany Geoge GmbH automatic shear line with the cut burs controlled within 0.02mm.
2) The silicon sheet fabrication adopts "no-upper yoke lapped' technology and all lapped joints of the silicon sheet are 45 full-miters. The laminated core sheets are integrally pressed and adhered with epoxy resin to make the three leg two-yoke core a strong and flat integral one with good verticality precision, this effectively improves no-load performance and reduces noises.
3) Bracing plates are used as support between coil leg and inner coil. The iron yoke is tied with epoxy resin-impregnated glass fiber band, and the lower section of oil tank is tightened with counter-pressure bolts. The upper iron and the upper section of oil tank are fixed at three locations. Hence the body inside the oil tank can withstand the vibration during transportation without any shift.
Winding:
1) The high-voltage (HV) coil adopts an interleaved-continuous structure to improve the voltage characteristics under impact voltage and make voltage evenly distributed. All stays and pads are chamfered to keep highly reliable insulation.
2) In the transformer winding there is a zigzag oil guide structure so as to fully cool all areas inside the winding, lower the temperature rise of the winding and the hot points of the winding and prolong the service life of insulation. The HV and MV regulation system are independently provided with voltage-regulating winding to balance the ampere turn of each winding, effectively lower the axial electrodynamic force generated at short-circuit of transformer and improve abrupt short-circuit withstanding capacity.
3) The winding adopts radial "0" margin designed, between the core and the paper sleeve of LV winding, and between the LV, HV, voltage-regulating windings, as well as before insertion of stays and shroud plate they are fully dried and tightly matched to ensure extremely good compactness and concentricity of the entire winding.
Oil tank and accessories
1) The tank wall adopts wide steel sheet, which will be folded into corrugated structure without splicing, in this way welds are decreased and mechanical strength is enhanced, meanwhile, the corrugated wall has diverging effect, and thus plays a role in decrease of noise. The routing troughs and control cabinets of the secondary circuit are all made of stainless steel, so the entire transformer has a simple and good looking.
2) All sealing surface use quality sealing material and are precision-machined.
3) On the edge of the tank there are double sealing grooves, and the outer sealing material is used to shade the atmosphere and ultra-ray to protect the inner sealing being damaged, thus at utmost prolonging service life and enhancing reliability of the seal.
Subassembly
As we have good cooperation tie with many subassembly manufacturers of famous transformer brands, we are able to provide different subassemblies as per users' requirements. The whole procedure of manufacture, R&D and sales service are carried out strictly in accordance with international standards and ISO quality management system.
Shenda Electric Group Co., Ltd. Locates in the economy most developed area, southeast of China, it is an appointed manufacturer of transformers at 220KV levels and below by National Electric Power Corp and Mechanical Industry Union. Our company is a domestic famous solely-funded company which holds two production bases and seven sales companies in different provinces, and the trademark of "EACHER " has been awarded "Famous Brand of Zhejiang Province".
Our company's annual total production capacity is about 18, 000, 000 kVA, and covers an area of 370, 000 m2 and a building area of 100, 000 m2, with total assets of 350, 000, 000 CNY, and employs more than 1000 staff members with engineering and technical employees accounting for 21%, and a strong after-sales service team whose every member has a passport always in the position to supply superior service at any possible shortest time.
We can provide more than 60 odd series and beyond 2100 odd specifications of transformers, the main products includes oil immersed power transformer, dry type transformer, combined transformer substation, amorphous alloy transformer, rectifier transformer, and especially in furnace transformers. And the performance measures up to the standards established by International Electric Committee (IEC).
Our company has advanced production and testing facilities which imported from Germany and Japan, such as silicon sheet shearing automatic lines, automatic and continuous extrusion lines of electromagnetic wires, Kerosene vapor vacuum drying systems and more than 1, 500 sets of productions and complete testing systems for professional transformer production and other testing equipment, it can meet the requirements of customer completely.
Our company has obtained ISO9001 quality management system and ISO14001 environmental management system certifications already and we also manage our company in strict accordance with these standards. We also obtained The CE certificate, Nation Standardization Management AAA Certificate, National Measuring System Certificate and etc., and many prizes also have been awarded to us in the past years by the relevant national Authority and local government.
Owing to our good reputation on quality and service, our products have been sold well not only throughout the domestic market, but also exported to overseas more than 20 countries and regions.
We sincerely hope we can provide you best products and satisfied service, and you are always warmly welcome to visit us.
