121kv/50000 kVA Oltc Power Transformer (SZ11)

Specifications 1) CTQC, ISO9001, ISO14001, CE 2) Apply for IEC, GB, ANSI 3) Up to 230kV, 180MVA 4) Low losses 220 110 66 kv series power transformer High voltage power transformer ratio range from 66KV to 220KV are the main products of SHENDA Electric which have many advantage both on quality and price.All the products has been fully tested and certificated before delivery. Plenty of our products have been exported and applied in oversea markets regarding power plant, substation, mineral and ore industries. Shenda electric is renowned and appreciated by its reliable products performance and integrated services. 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: Core:Effectively upgrade transformer's no-load performance by below methods: 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.  Rated power (kVA) H.V  (kV) H.V. Tap range L.V  (kV) Vector Group Impedance  (%) No-load Loss    (kW)On-load Loss   (kW) No-load Current (%)  Oil Weight (kg)Total weight (kg)  Overall dimension (mm) 800 35/38.5   ±3*2.5% 6.3 Yd11  or  YNd11 6.5 1.06 9.98 1.05 1650 4790 2870*1810*2570 1000  35/38.5  ±3*2.5%   6.3  Yd11  or  YNd11   6.5 1.26 12.16 1 1760 5210 3150*1890*2650 1250  35/38.5  ±3*2.5%   6.3  Yd11  or  YNd11  6.51.49 14.63  0.9 2010 6080 3510*2040*2690 1600  35/38.5  ±3*2.5%   6.3  Yd11  or  YNd11  6.5 1.8 17.58 0.85 1920 66103560*2070*2740  2000  35/38.5  ±3*2.5%   6.3  Yd11  or  YNd11  6.5 2.3 19.24 0.8 2160 7440 3680*2050*2850 2500  35/38.5  ±3*2.5%   6.3  Yd11  or  YNd11 6.5   2.72 20.64 0.8 2580 8240 3780*2220*2890 3150  35/38.5  ±3*2.5%   6.3  Yd11  or  YNd11 7 3.23 24.71 0.72 2680 8540 3850*2310*2950 4000  35/38.5  ±3*2.5% 6.6  Yd11  or  YNd117  3.87 29.16 0.72 2960 11180 4120*2380*3150 5000  35/38.5  ±3*2.5% 10  Yd11  or  YNd11 7 4.64 34.2 0.68 3050 12480 4210*2510*3220 6300  35/38.5  ±3*2.5% 10.5  Yd11  or  YNd11 7.