240MVA/345kV three-phase OLTC auto-transformer

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Place of Origin: HeBeiBrand Name:


Model Number:






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 240MVA/345kV three-phase OLTC auto-transformer can 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 240MVA/345kV three-phase OLTC auto-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 240MVA/345kV auto-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: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:Can Someone Explain Transformers?
I'd like someone to explain these dumb Action movies to me too!!! :
Q:Transformers seven primes?
Depends on the continuity. Traditionally, there were not seven, but thirteen original Primes. Neither Optimus or Sentinel were one of the originals, whether you want to say that there are thirteen or seven. Prime is simply a title given to the leaders of the Autobots, passed down from the original transformers. Since you said seven, I'm assuming you meant movie continuity. In that case, Megatronus Prime, later to be known as The Fallen betrayed the Primes' laws of peace, hence his name. The other six used their physical forms to create a vault in which to hide the Matrix of Leadership from The Fallen. The lore from other continuities is much more interesting however. The fate of those versions of the original Primes range from death, to splitting into smaller transformers and scattering across the galaxy, to living in their own pocket dimension in peace, or to chronicling the history of Cybertron, albeit with their true identity hidden.
Q:can ferro alloy smelting furnace transformer can be converted to higher voltage to handle ferronickel smelting?
You need to provide more information about the original use of the transformer. Nickel smelting is a very specialized application that calls for a 'submerged arc'. Basically, the arc is fairly short and will essentially be submerged in a layer of slag on top of the molten material. It is a semi-continuous process in that periodically, some of molten nickel is poured off. The stream of molten nickel is blasted with water that causes the nickel to solidify into small pellets. Steel melting furnaces, by contrast, involve a much longer arc. The slag layer in the furnace is much thinner, and much of the arc is above the slag. It is a batch process in that once the 'campaign' has been completed, the entire melt is 'tapped' - poured into a tundish either to be cast into ingots or to feed a continuous casting process to make billets, slabs or even plates. There are other smelting processes for other materials - for example, silicon is produced via a smelting process. I would guess that if the voltage requirements of the nickel smelting process are different from the requirements of the original utilization, then it would be necessary that the transformer be redesigned and rewound - something that I would not expect to be very practical.
Q:What is the use of the lower part of the transformer made of rail?
Transformer The lower part of the box has two structures: 1 set the wheels. This requires the installation of the track on the basis of the transformer, and then the wheels fixed on the I-beam track, this way to facilitate the maintenance and installation of the transformer handling, but because of the large and larger transformers, the use of wheels is already less; I-beam or channel as a load-bearing beam. This transformer does not need to set the track, on the basis of the transformer relative to the location of the beam weighing embedded flat steel, the transformer in place after the load-bearing beam fixed fixed on the base embedded parts. Need to move the transformer, the chisel spot welding, with the hoist and other machinery will slowly drag the transformer.
Q:Where is the transformer used?
Transformers are suitable for applications where the voltage level is to be changed Need to change the impedance to match the front and rear impedance of the occasion It is necessary to increase the current supply as a booster
Q:Transformer short-circuit impedance is big good, or small good? The same capacity, voltage ... solution
Can not simply say big or small good because of the big, in the normal operation of the loss of certain size, in the short circuit. Short-circuit current will be great, less investment protection equipment corresponding to the requirements of the money so much to be more economic comparison Caixing! Can not be generalized, the choice of different transformers, impedance voltage is not the same; national transformer standard series, the general 10KV distribution transformer impedance of more than 5%, 35KV transformer impedance of more than 8%, 110KV transformer impedance In the 10% or so, the greater the capacity, the greater the impedance; transformer impedance increases, you can effectively reduce the size of short-circuit current, so in high voltage, high-capacity transformers, multi-purpose high-impedance or series reactor To reduce the short-circuit current, or some equipment is not a good choice; but the transformer impedance increases, the transformer will increase the volume, material consumption increases, the transformer running loss increases, but also to reduce the transformer secondary voltage, Is the transformer overload, the voltage will quickly decline, in case of short circuit conditions, may cause other equipment, low voltage action; under normal circumstances, or use the standard design of the transformer products, unless the special needs, do not use non-standard products, or in the Transformer side by side, selection, testing, maintenance, replacement will cause additional trouble.
Q:Help with a Toroidal Transformer. best answer will get max points!!!!?
The transformer is used to drop the 120vac to around 26vac. Without the supporting components you will not get DC voltage. Now, you can bypass the tranformer if you have an adapter that puts out 30vdc or close to it and your speakers will work fine. Now, if the amp is built into the speakers, then it will not work.
Q:Give me a detailed description of what happens in Transformers 1&2?
Transformers: Plot - Autobots and Decepticons travel to Earth to find the AllSpark, launched into space by Optimus Prime from Cybertron millions of years ago, and found by a team of scientists who kept it, and a frozen Megatron hidden underneath Hoover Dam for seventy years. The key to finding it rests with a teenage boy, Sam Witwicky. Character list (major players, for time's sake) Humans: Sam Witwicky, Mikaela Banes, Capt. William Lennox, TSgt. Robert Epps, Rachel, Special Agent Simmons, Secretary of Defense Keller * (deceased) Autobots: Optimus Prime, Jazz*, Bumblebee, Ironhide, Ratchet Decepticons: Megatron* (will return), Starscream, Barricade, Bonecrusher*, Blackout*, Scorponok, Frenzy* Transformers: Revenge of the Fallen Plot - The Fallen, a rogue Transformer and also a Prime, sets out with a revived Megatron to find the Matrix of Leadership in order to power the Sun Harvester, built thousands of years ago by the Dynasty of Primes in order to siphon a massive supply of energon from the sun. By turning this machine on, the sun will be totally drained of energy and turn Earth into a frozen wasteland. To succeed, the Decepticons must first kill the only one who can defeat the Fallen, Optimus Prime, and capture Sam, who unconsciously knows the way to the Matrix. Humans; Sam, Mikaela, Lennox, Epps, Graham (the British NEST soldier), General Morshower, Simmons, Leo, Director Galloway Autobots: Optimus Prime* (does return), Bumblebee, Ironhide, Jetfire*, Wheelie, Ratchet, Jolt, Elita-1, Arcee, Chromia, Mudflap, Skids, Sideswipe. Decepticons: The Fallen*, Megatron, Starscream, Grindor*, Sideways*, Ravage*, Devastator*, Rampage*, Pretender Alice*, Demolisher*, Soundwave, The Doctor, Scorponok*, numerous Decepticon soldiers.*
Q:is pole mounted transformer emf harmful?
It takes voltage and current (together they create power) to create EMF. EMF energy is an inverse cube function of distance. The effects you feel from 120V at 10 feet would exceed the effects of 7000V at 35 feet, assuming the same current. Of course, the current at the transformer pole probably far exceeds the kind of current you find in household appliances, but on the other hand people get much closer to 120V that 10 feet. I bet you get more EMF from your vacuum cleaner than from your pole transformer.

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