250MVA/500kV main transformer power station phase

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Place of Origin: HeBeiBrand Name:


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Coil Number:

3 Winding


50000 63000 80000 100000 120000 180000

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YNd11 Dyn11 YNyn0d11


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MR or ABB or SMS

Packaging & Delivery

Packaging Detail:Mainbody --naked Disassembled parts -- crate
Delivery Detail:3 months



1. CESI certificate
2. High short-circuit withstand
3. Low loss, PD and noise
4. CTQC certificate
5. No leakage




The application of 250MVA/500kV main transformer  power station phasecan significantly improve the economy of the UHV substation, and matches well with the transmission capacity of UHV lines, which has wide prospect of application. Because of its large capacity and large volume, the whole transportation weight with nitrogen is about 470-490 tons, and due to the restricted transport conditions, the transportation becomes the critical issue for application of the 250MVA/500kV main transformer  power station phase. In order to make the products applicable to any UHV substation in our country, the state grid of corporation of China set the "A study of easy-transport large capacity UHV Transformer” as a key scientific research projects, and entrusted BTW to carry out the research.

During the process of research and development, BTW adopted the advanced design technology and modular design, the transformer can be transported disassembly and with advantages of compact core and winding body, less transportation weight and low transportation cost, effectively solves the need of UHV construction in the transportation restricted areas. By using the most advanced 3D magnetic field calculation software, BTW performed detailed analysis and calculation for the magnetic flux leakage and eddy current loss of the transformer coil, iron core and oil tank steel structures. Besides, by using of the advanced electric field calculation software, BTW performed detailed analysis and calculation of main longitudinal insulation, and mastered the arrangement of the main longitudinal insulation of large capacity UHV transformer and the control of distribution of winding magnetic flux leakage. All of which make the products with low loss, low noise, small volume, strong anti short circuit ability, no local overheating and other significant advantages, and guarantee the long-term safe and stable operation.

The world's first on-site assembled large capacity UHV Transformer’s right at the first time once again filled the gap in the field of UHV transformer research after Chinese transformer industry overcame the difficulty of integral transport of 250MVA/500kV main transformer  power station phase, which marks BTW has fully occupied the world transformer industry technical peak. The successful development of the product filled the gaps in the domestic technology and met the urgent need of UHV construction application in our country, greatly improved the technical level and manufacturing ability of BTW in terms of UHV Transformer products.


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Q:What is the difference between the inverter and the transformer?
Literally speaking: the former is the conversion frequency, which is the conversion voltage. Structurally speaking: The former is a complex electronic device, the latter is relatively simple equipment. From the working principle speaking: Inverter: first input AC rectifier filter, the control circuit according to the needs of the output modulation signal, the signal control power output tube turn on and off (usually half bridge or full bridge), by changing the turn on and off time, The corresponding output frequency. Transformer: the usual sense of the transformer is composed of multiple coil winding and core components, in which one winding on the application of AC voltage, the other winding will produce the induced voltage, the voltage ratio for the winding turns ratio, The main frequency of the output frequency is the same as that of the input, and the harmonics are predominantly even.
Q:How to use a multimeter to determine the quality of small transformers
Small transformer primary coil is generally 1 ~ 2k ohm, the secondary coil tens of ohms. If the problem with a multimeter measuring coil or open circuit, or open. There is also a fault that there is a short circuit in the middle of the coil, so that you only take the same transformer to compare the coil resistance.
Q:What is the impedance voltage standard of a power transformer?
35kV on-load pressure: ≥2000kVA≤2500kVA, 6.5%; ≥3150kVA≤5000kVA, 7.0%; ≥6300kVA≤10000kVA, 7.5%; ≥12500kVA, 8%; 66kV: ≤ 5000kVA, 8%; ≥6300kVA, 9%; 110 kV: double windings are 10.5%; three winding boost: high - medium 17-18%, high - low 10.5%, medium - low 6.5%; buck: high - 10.5%, high - low 17-18% , Medium - low 6.5%
Q:How do I choose a transformer? The
According to the nature and size of the load to determine the capacity of the transformer. The ratio is selected according to the supply voltage and the voltage required for the load.
Q:Is the secondary current rating of the transformer line current or phase current?
For star-wiring products, the line current = phase current For triangular wiring products, the rated current refers to the line current (phase to phase current)
Q:50KVA transformer maximum load is how much?
Transformer (Transformer) is the use of electromagnetic induction principle to change the AC voltage of the device, the main components are primary coil, secondary coil and core (core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage regulator (magnetic saturation transformer) and so on. According to the purpose can be divided into: power transformers and special transformers (electric furnace change, rectifier, frequency test transformer, voltage regulator, mine transformer, audio transformers, IF transformers, high-frequency transformers, impact transformers, instrument transformers, electronic transformers , Reactors, transformers, etc.). The circuit symbol is commonly used as the beginning of the number.
Q:10KV distribution transformer how to calculate the tap voltage
To 10 ± 5% of the gear, for example, the transformer for the third gear, each level gear can be adjusted 10000 × 5% = 500V, then Ⅰ file tap voltage 10000 +500 = 10500V, Ⅱ file tap voltage 10000V , Ⅲ gear tap voltage 10000-500 = 9500V
Q:Transformer secondary side is high pressure or primary side is high pressure
Transformer can be divided into two types of step-up transformer and step-down transformer, the primary side of the transformer is the voltage input, the secondary side is the output. Step-up transformer is the secondary side voltage greater than the primary side, step-down transformer is the secondary side voltage is less than the primary voltage.
Q:What does S11-M-500/10 transformer mean?
The first floor has been very accurate to answer my answer that M is sealed!
Q:What is the temperature of the dry-type transformer?
It depends on the insulation of the transformer is how much. Generally the highest temperature has 105/120/130/155 degrees and so on. Normal use, more than 80 degrees on the need to use the cooling measures. Another dry-type transformers do not install the temperature sensor, then it is not alarm, only installed the temperature sensor will!

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