120000kVA 230kv Oil Immersed on Load Tap Changer Power Transformer

Description:Double Winding Non-excitation Voltage Regulation Transformer: Maximum 420000kVA Three Winding Non-excitation Voltage Regulation Transformer: Maximum 240000kVA Double Winding On-load Voltage Regulation Transformer: Maximum 240000kVA Three Winding On-load Voltage Regulation Transformer: Maximum 240000kVA Autotransformer: Maximum 360000kVA Technical parameters:Name: Three-phase dual winding with stabilization winding on-load voltage regulation oil immersion air-cold power transformer Type: SFZ-120000/230 Rated voltage: 230/34 /25kv Rated capacity: 100000/120000kVA Rated voltage ratio: 230± 8× 1.25%/34kV Rated current: 301/2038A Phase number: Three Rated frequency: 50 Hz ± 3% Connection set: Ynyn0(d11) Voltage regulating method: Neutral point on-load Regulating Short circuit impedance: 9.5%(100MVA) Cooling mode: ONAN/ONAF Winding insulation level: Lightning impulse withstand voltage (kVpeak value) 1min Main frequency withstand voltage (kVRMS) Full wave Chopped wave High voltage side: 1050 1175 460 Neutral point of high voltage: (1050) ( 460 ) Low voltage side: 170 185 70 Neutral point of low voltage: 170 70 Insulation Level: A Field strength between transformer winding turns is no more than 2kV/mm Transformer loss (under 75) o-load current and efficiency No-load Loss: 92 kW According to IEC standard Load Loss: 356 kW According to IEC standard No-load current: 0.3 % According to IEC standard Radio interference and corona Under the Maximum phase voltage, corona is not visible from outgoing terminal in the night of clear day at outdoor. Radio interference voltage is no more than 2500UV. Ratedpower(kVA)ValtageConnction9  loss (kW)10  loss (kW)11  loss (kW)No-load Loss(%)H.V(kV)L.V(kV)No-Load LossLoad LossNo-Load LossLoad LossNo-Load LossLoad Loss31500230242±2×2.5%6.36.610.511YNd113513531.5128.328128.30.7400004115736.9149.232.8149.20.7500004918944.1179.639.2179.60.65630005822052.220946.42090.657500010.51113.86725060.3237.553.6237.50.6900007728869.3273.661.6273.60.551200009434584.6327.875.2327.80.55150000112405100.8384.889.6384.80.51600001113.815.751820117425105.3403.893.6403.80.49180000128459115.2436.1102.4436.10.46240000160567144538.7128538.70.42300000189675170.1641.3151.2641.30.38360000217774195.3735.3173.6735.30.3837000015.751820221790198.9750.5176.8750.50.38400000234837210.6795.2187.2795.20.35420000242868217.8824.6193.6824.60.35Provide users with 500kV and below, 1000MVA and below series oil immersed power transformers. stay While digesting the advanced technology at home and abroad, combined with the advanced technology at home and abroad and our company's experience in producing power transformers for many years, through Through optimization and innovation, we have successfully produced a series of power transformers with low noise, low loss, low partial discharge and high short-circuit resistance, Fully comply with and superior to national standards and International Electrotechnical Commission recommended standards Reference:1. Low loss and low noise The core piece adopts the laminated form of full oblique joint, and the oil tank adopts composite shielding technology Structural parts adopt measures such as reducing eddy current loss to solve the phenomenon of local overheating. 2. Safe and reliable operation The electrical calculation adopts simulation software for positioning and quantitative analysis to ensure sufficient electrical strength and reliability Low loss and effective suppression of local overheating; The local discharge is kept below 50pc, and the temperature rise of transformer winding and oil surface are low Above 5K of national standard, yield strength of winding conductor ≥ 180n / mm2, copper conductor, transformer It has strong short-circuit resistance, which can ensure the long-term stable operation of the transformer. 3. Easy installation and maintenance The transformer adopts core free structure, and all accessories are pre installed in the factory. The transformer adopts maintenance free structure and technology, and the product maintenance is simple and convenient. 4. Fine workmanship The coil is wound by vertical winding machine and equipped with tensioning device to ensure the axial direction of all windings Winding force to improve the mechanical strength of winding. The combined suit process is adopted to reduce the assembly tolerance of the body and improve the overall quality of the body strength. All high voltage electrodes and metal structures are rounded to avoid tip discharge Our Best Service For You1.Pre sale servicea.make technical solutionb.send quotation, technical data sheet and drawingc.prepare power transmission plan, testing plan and shipment plan2.In sale servicea.supervise the manufacturing schedule totally in accordance with the planb.send photos to customer during every manufacturing process(hold point)c.inform the customer one week before testing.3.After sale servicea.installation and commissioning, training the workersb.quick response within 12 h