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220kV Power Transformer Oil-immersed Transformer (up to 750kV)

220kV Power Transformer Oil-immersed Transformer (up to 750kV)
INQUIRY PRODUCT
220kV Power Transformer Oil-immersed Transformer (up to 750kV)
$0.00
  • Stock: In Stock
  • Model: 220KV
This product is customized according to User Requirement , the above price is for reference, please contact us.

1. General

1.1 Application

10kV-750kV transformers are mainly made of iron core and windings,which are placed in the oil tank that filled with insulating oil. it is mainlyused for power plant, power transmission and distribution station as theequipment of power transformation.

1.2 Type and Rating

Product types: single phase or three phases,Two windings or three windings,on-load or no-load voltage tap changer, autotransformer, natural cooling, air cooling, forced-air coolingor water cooling,etc.
Capacity range: 50kVA-650MVA
Frequency: 50/60Hz

1.3 Standard: lEc 60076-1:2000,IEC 60076-2:1993,IEC 60076-3:2000,IEC 60076-5:2006,IEC 60137:2003;ANSI, IEEE, AS, etc.

1.4 Operating Condition

Suitable for indoor and outdoor application.
Ambient temperature:+40℃~-30℃
Relative humidity: ambient air relative humidity should be below93%.
Altitude:<1000m
Max wind speed:<35 m/s
Earthquake acceleration: horizontal acceleration <0.3gvertical acceleration <0.15gSpecial conditions: customized products are available.

2. Technical Feature

2.1 High Reliability

Insulation strength: Through the method of finite elements analysis.analyze the interior electric field on different transformer for thepurpose that there is no over-centralized area of field density in theinterior of transformer. At the same time,by the adoption of insulatingmaterials and optimizing electrode shape, make no partial discharge design,and through the effective analysis on transformer wave process,ensurethat the transformer can withstand varous over-voltages such as, lightningimpulse over-voltage.
Short circuit strength: through the analysis of leakage magnetic fieldof transformer, the electromagnetic force can be well controlled in the Structure design, and together with equipment and suitable materials,the requirement of short circuit strength can be sufficiently satisfied.Our design method has been testified through short circuit test onproducts at different voltage levels, which also testifies that ourproducts have enough strength against short circuit.Temperature rise: The temperature distribution can not get effectivelycontrolled may result in the aging of transformer insulation. There isno over-centralized temperature area in the transformer interior andthe insulation life has been ensured through the analysis of oil flowand temperature field in transformers.The reliability of products has been greatly improved.

2.2 Low Power Loss And Low Operation Cost

The transformer has relatively low losses through the optimizeddesign, the detailed analysis of leakage magnetic field and the lossesdistribution. The maintenance cost has decreased through theCustomer-oriented design.

2.3 Customer-oriented Design

Based on the 3D design method to simulate feeders, operation filedand terminal box arrangement are in full consideration of operatingconveniences, which meets the requirements on cost loweringand customization, as well.

3. Structural Feature

3.1 lron Core

The iron core is made of cold roled, granularonented, low:loss and high maqnetic conductive siicon steel sheet, which is of multi-step completely tilted structure to reduce the loss and noise. lron core with fixed clamps optimizes the design so as to ensure mechanical strength and to reduce leakage losses. Adoption of PET banding structure ensures the clamp force of core column and lowers the noise.

3.2 Winding

HV winding adopts entanglement or inner screened continuous type with phase insulation structure to ensure insulating strength.V/y windings adopt high strength or adhilbit- transposition conductor, forced cooling to reduce the temperature rise and enhancecapability of short circuit withstand.

3.3 Active-parts Assembly

Cold pressing ensures cleanness of the body active parts and the reliability of leads. Adoption of whole asembled phase insulation so as to reduce the assembly time and efectively guarantee the dimension and shape of the insulation structure. HV lead adopts specially molded insulation parts for protection which effectively guarantees its insulating strength and reduces partiadischarge.

3.4 Oil Tank

Three-dimension finite element strength analysis and Pro-E mold is adopted, which have reinforced the mechanical strength. Adopting of welding automatic submerged arc-welding and ultrasonic of fluorescence leakage test to guarantee leakage-free. The surface coating is strictly controlled.

3.5 Assembly and routine test

High qualified components to ensure good performances. After assembly, strict pre-delivery test according to standard, with exquisite testing technique and equipments to provide high quality and reliable product.
Effective positioning structure to guarantee the fastness of the body during transportation or in service.

4. Ordering Information

On ordering, please provide the following product-related technicalrequirements: Product type, single-phase or three-phase, the windingnumber, rated voltage of each windings, rated frequency, rated power,insulation level, voltage combination and tapping changer type, connecting group, short-circuit impedance, no-oad loss, no-oad curent,load loss, cooling method, service conditions, execute standards andother special requirements.

 

31500kVA~360000kVA two-winding transformer with NVTC (HV neutral is indirect grounding)

Rated capacity Rated voltage and tapping range Vector group No load current Impedance voltage No load losses On load losses
kVA HV LV % % kW kW
31500 220+/-2*2.5%, 242+/-2*2.5% 6.3,6.6,10.5,11 YNd11 0.70 12~14 35 135
40000 0.70 41 157
50000 0.65 49 189
63000 0.65 58 220
90000 10.5,13.8,11 0.55 77 288
120000 0.55 94 345
150000 11,13.8,15,75 0.50 112 405
180000 0.46 128 459
240000 0.42 160 567
300000 15,75,18 0.38 189 675
360000 0.38 217 774

 

31500kVA~240000kVA three-winding transformer with NVTC (HV neutral is indirect grounding)

Rated capacity Rated voltage and tapping range Vector group No load current Impedance voltage No load losses On load losses
kVA HV MV LV % Step up Step down kW kW
31500

220+/-2*2.5%, 242+/-2*2.5%

69,121 6.3,6.6,10.5,11,35,38.5 YNyn0d11 0.70 HV-MV: 22~24; HV-LV: 12~14; MV-LV: 7~9 HV-MV: 12~14; HV-LV: 22~24; MV`LV: 7~9 40 162
40000 0.63 48 189
50000 0.56 56 225
63000 0.56 66 261
90000 10.5,11,13.8,35,38.5 0.49 86 351
120000 0.49 106 432
150000 11,13.8,15,75,35,38.5 0.42 125 513
180000 0.42 142 585
240000 0.35 176 720

 

31500kVA~240000kVA transformer with NVTC (HV neutral is indirect grounding) 

Rated capacity Rated voltage and tapping range Vector group No load current Impedance voltage No load losses On load losses  
kVA HV LV   % % kW kW
31500 220+/-2*2.5% 63,66,69 YNd11 0.89 12~14 38 151
40000 0.89 45 176
50000 0.82 53 211
63000 0.82 63 247
90000 0.75 83 323
120000 0.75 102 387
150000 0.68 122 453
180000 0.68 138 513
240000 0.61 171 635

 

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Quality Assurance Period (QAP) Explanation

1.    The Quality Assurance Period (QAP) is an important aspect of our commitment to ensuring the quality and reliability of our products. We understand that customers rely on our goods to function properly and meet their expectations. To demonstrate our confidence in our offerings, we provide a warranty period during which we take responsibility for any quality issues that may arise.
2.    The length of the warranty period varies depending on the type of product. Generally, for consumable components subject to wear and tear, such as abrasion parts, the warranty period is three months. For smaller components, the warranty period is typically extended to six months. As for major equipment and machinery, we offer a one-year warranty period.
3.    We also recognize that each customer's requirements may differ, and we are open to negotiation regarding the warranty period. If the buyer requests a specific warranty duration that differs from our standard policy, we are willing to discuss and accommodate their needs accordingly.
4.    During the warranty period, we take full responsibility for any quality-related issues that arise. If a product is found to be defective or malfunctions due to manufacturing or material faults, we are committed to providing a resolution. This includes either replacing the faulty component or conducting necessary repairs to restore the product to its intended functionality. Our aim is to minimize any inconvenience caused to our customers and ensure their satisfaction.
5.    It is important to note that the warranty does not cover damages resulting from improper use, mishandling, or normal wear and tear. Additionally, if any modifications or repairs are carried out by unauthorized personnel during the warranty period, the warranty may become void.
6.    At our company, customer satisfaction is our top priority. We strive to provide high-quality products that meet and exceed expectations. The Quality Assurance Period serves as a testament to our commitment to delivering reliable solutions and ensuring that our customers have peace of mind when choosing our products.

Transportation:

1.    We offer various trade methods, including EXW, FOB, CIF, DDU, DDP, etc., allowing customers to choose the most suitable option based on their requirements.
2.    We consider the proximity to the factory where the goods are located when selecting the appropriate port of departure.
Customers can provide the destination port where the consignee is located or choose a designated port for delivery.
3.    Our transportation methods encompass a wide range of options, including waterway transportation, air transportation, and courier services such as DHL, FedEx, EMS, UPS, TNT, etc.
For waterway transportation, we work with reputable shipping companies such as APL, CMA, CNC, COSCO, EMC, EVERGREEN, HMM, KMTC, MCC, MSC, MSK, ONE, SITC, YML, etc.
Air transportation is available through airlines such as (Air China): CA; (China Southern Airlines): CZ; (China Eastern Airlines): MU; (Garuda Indonesia): GA; (Cathay Pacific Airways): CX; (Cathay Dragon): KA; (Korean Air): (Japan Airlines): JL;  (Singapore Airlines): SQ; (Thai Airways International): TG, and more.
4.    The transportation time will vary depending on the destination and the chosen transportation method. We will communicate and confirm the estimated time of arrival with the customer prior to shipping.
5.    Shipping costs are influenced by factors such as transportation method, weight, size, and destination. We provide shipping cost estimation services to assist customers in budgeting.
6.    Once the goods are shipped, we offer order tracking services to provide customers with detailed information about the whereabouts of their shipment. Additionally, based on the selected trade method, we can arrange cargo insurance to provide compensation in the event of loss or damage during transportation.
7.    The specific transportation arrangements mentioned above will be coordinated by dedicated personnel, taking into account the actual situation and policies. We strive to tailor the optimal and most cost-effective shipping plan based on the information provided by the customer.

Please note that we are committed to ensuring the smooth transportation of goods and will work closely with customers to address any specific requirements or concerns they may have regarding transportation.