250MVA/220kV standby transformer for factory

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Place of Origin: HeBeiBrand Name:


Model Number:




Phase: Coil Structure:


Coil Number:

3 Winding

Capacity: Rated Voltage:


Connection Symbol:

YNd11 Dyn11 YNyn0d11


Cover type or Bell type


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 the 250MVA/220kV standby transformer , 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 200-490 tons, and due to the restricted transport conditions, the transportation becomes the critical issue for application of the 250MVA/220kV standby transformer. 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 the 250MVA/220kV standby transformer, 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:how to start collecting transformers?
just okorder
Q:12 VAC 60W Transformer?
Yes. 60 watts is the MAXIMUM you can use with that transformer.
Q:old transformers cartoons.what did you think of them?
I loved the original Transformers' cartoon. Optimus Prime was the ultimate good guy and Megatron the paramount bad guy. No matter the odds the Autobots never gave up. Some of the coolest characters were Autobots and Decepticons. The Dinobots were just freaking cool and I always like Soundwave. The only reason the movies even had a chance of success was that they brought back the original voice of Optimus Prime. Optimus dying was a shock to be sure, but they still did a good job without him for awhile. I have happily introduced my son and daughter to the original series and they both liked it more than the new movies. It is okay you don't like the original cartoons. They aren't everyone's cup of tea.
Q:Which 2 Shooters should I buy this fall: Halo 4, BLOPS 2, Transformers FOC?
i suggest you Black Ops 2 and Transformers FOC. These two are much better than Halo3
Q:How to open a transformer?
They are glued, or even sonically welded. They are made to be replaced not repaired. They can be open by sawing a knotch in the corner and prying open with a screwdriver.
Q:About Transformer ?
Hard to say. higher frequency lower magnetization current lower copper losses but higher magnetic losses. It depends on specific construction of the transformer. Roughly I'd say no significant change in heat dissipation.
Q:How does a neon transformer work?
Neon transformers step up the 120 Volt power to several thousand volts - enough to create a long spark in air. Every neon sign has a neon transformer either as part of it or very close by. The gas inside the neon tube and the color of the glass the tube is made of control what color the tube will shine. Neon gives a reddish-orange-ish color. Other gasses, such as argon, helium, xenon, krypton, etc., will glow different colors when enough voltage is applied to them, causing the gasses to ionize and produce light. Using colored glass tubes also controls the color. The inside of the tube may also be coated with a phosphor - much like a fluorescent lamp - to produce a particular color. For more information, see:
Q:Why there are no 4 phase transformers?
Redudancy is just one small advantage of using three phase. The main advantage is that three is the minimum number of phases to generate a balanced magnetic field in transformers and a smooth rotating magnetic field in motors. The math for all these works out really nicely. I suppose the math could be worked out for four phases. But the above reasons mentioned, extra wires and complications in transformers and motors makes the four phase approach less attractive from an economic standpoint.
Q:What are the malfunctions and abnormal operation of the transformer?
Transformer failure: can be divided into the tank failure and tank failure. Fuel tank failure: a short circuit between the windings, short-circuit between the turns, direct grounding system side winding short circuit. Outside the tank failure: There is a short circuit between the casing and the lead wire and the ground short circuit (direct grounding system side). Transformer is not working properly: there are external faults caused by over-current, overload, oil level and due to over-voltage or frequency caused by over-excitation and so on. Line fault: phase short circuit (including three-phase short circuit, two-phase short circuit), two-phase ground short circuit, single-phase ground short circuit, transmission line disconnection.
Q:10KV distribution transformer how to calculate the tap voltage
If the gear is expressed as 10 ± 2 × 2.5%, the transformer is 5 files, each level gear can be adjusted 10000 × 2.5% = 250V, and so on.

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