• 250MVA/500kV main transformer  power station phase System 1
250MVA/500kV main transformer  power station phase

250MVA/500kV main transformer power station phase

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Loading Port:
Tianjin
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TT OR LC
Min Order Qty:
1 pc
Supply Capability:
1 pc/month

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Quick Details

Place of Origin: HeBeiBrand Name:

CNBM

Model Number:

 

Usage:

Power

Phase:

Three

Coil Structure:

Toroidal

Coil Number:

3 Winding

Capacity:

50000 63000 80000 100000 120000 180000

Rated Voltage:

 250MVA/500kV

Connection Symbol:

YNd11 Dyn11 YNyn0d11

Tank:

Cover type or Bell type

OLTC:

MR or ABB or SMS

Packaging & Delivery

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

Specifications

 

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

 

 Description

 

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.

 

Q:I have a question can someone explain why transformers get hot in use and why must they not be allowed to get too hot
Transformers Hot
Q:I know that the ratio of primary turns to secondary turns is the multiplying factor in voltage. So if you wanted 100,000 volts from a 10 volt source could you potentially do this:4 transformerseach transformer has 10 coils in primary and 100 in secondaryThe output of each transformer's secondary is connected to the primary of the next transformer so that you get 10*10*10*10 or 10,000 as your multiplying factor.Would this work?or do you have to do it the hard way and wind 10 coils in the primary of a single transformer and wind 100,000 times in the secondary?
It is not practical to use 4 transformer in cascade. using four same transformers will not work too. If you really want to cascade the transformers you need to do as follows, Let say you are using the transformer which has 1 turn/volt. All 4 transformer must be same capacity , same turn ratio ,but different voltage in/out (different coil size) 10 volts 10 turns , 100 volts 100 turns First transformer will have 10turns/100 turns , you have 100 volts output this will feed to second transformer which must have 100 turns/1000 turns and output is 1000 volts third transformer will have 1000 turns/10000 turns output is 10000 volts and finally fourth transformer has 10000 turns/100000 turns and you will get 100000 volts. As you see you will not save, instead you need to spend more.
Q:What is a transformer paused?
In accordance with the provisions of Article 24 of the Power Supply Business Rules: The user is suspended and must apply to the power supply company five days ago. The power supply enterprise shall handle the following provisions: 1. In each calendar year, the user may apply for all the temporary (including the high voltage motor that does not pass the receiving transformer) or part of the electricity capacity of the temporary stop power twice, each time not less than fifteen days, one year cumulative pause Not more than six months. Seasonal electricity or other users of the country, the cumulative pause time can be negotiated; 2. According to the transformer capacity of the user to charge the basic electricity, the suspension of electricity must be the whole or the whole group of capacitors to stop running. After receiving the application for suspension, the power supply enterprise shall pay the suspension of the equipment according to the date when the user applies for the suspension. From the date of the seal, according to the original billing method to reduce the corresponding capacity of the basic electricity;
Q:I know there is decepticons and autobots but i remember hearing somewhere that in the cartoon version transformers there was anothere group
humabots!! xD lol jks
Q:Transformer if the boost and buck current will change? According to the power of the same should be high voltage side of the current point is also the opposite? Boost and buck can be specified?
According to the formula P = √3IVcosφ ,, in the case of P unchanged, V increases, I on the drop, V down, I on the rise in the case of the transformer load is constant, increase the voltage and current drop, reduce the voltage and current rise; The
Q:How is the transformer sorted?
Commonly used transformer classification can be summarized as follows: 1, according to the number of points: 1) single-phase transformer: for single-phase load and three-phase transformer group. 2) three-phase transformer: for three-phase system of the rise and fall voltage.
Q:A stepdown transformer is used for recharging the batteries of portable devices such as tape players. the turns ratio inside the transformer is 13:1 and it is used with 120 V rms household service. if a particular ideal transformer draws 0.350 A from the house outlet, what are the voltage and the current supplied to a tape player from the transformer. How much power is delivered?
The tape player receives an output of 120/139.2V rms from the transformer. The tape player's current draw on the transformer is 2.6mA or 0.026A. Your power usage is 10.04Wh or .01kWh.
Q:I have 12 x 12V 10W lamps in series would I be correct in saying I need a 230-12V 120W transformer to suit?
Are you sure that they are in series? If they are truly in series, then you need 144v. What is the application? Did you wire them yourself, or did they come that way?
Q:i would say transformers alll the way
They were both pretty bad but I'd go with Transformers since it actually seemed to have a plot and awesome effects.
Q:Hi, I replaced two 12V 20W halogen bulbs (wired in parallel) by two 3W 12V LEDs also in parallel. The problem is that the transformer (in a kitchen fume hood) seems to shut down when both LEDs are connect. It can take one but the two cause problems. I guess this might be caused by the very low resistances of the the 2 LEDs connected in parallel that short circuit the transformer? How can I reduce this short circuit without causing significant voltage drop for the LEDs? I tried using them in series but they won't work because they will then each have half the required voltage. Of course the idea is o find a solution that will also not significantly interfere with the energy savings associated with the change of halogen by LED. Btw, the LEDs are MR16 and have their own little voltage regulator/stabilizer circuit (or whatever that is).Thanks!
Low Voltage transformers (ELV or MLV) are tricky. Just because you have the voltages the same doesn't mean you have the right current being drawn by the LED's.It could be too low or too high. Were the original halogens MR16 form factor as well? I'm guessing the xfmr was specifically designed for a set voltage/current/power. Consider this: Two 20W halogens 40W. PowerVoltage*Current 2012*I I 1.67 amps through each bulb, 3.33 amps total drawn from the xfmr Transformers operate on the principle of Power in Power Out. The xfmr is probably designed to provide 40W, regardless of whatever current draw you put on the transformer. The LED's only need 6W from the xfmr. However, the xfmr probably doesn't care. It's still spitting out 40W at 3.33A. 0.5A (2*3W/12V) is all the LED's need. If the xfmr is still trying to provide 40W at 0.5 amps, the output voltage is compensated up to 80V coming from the xfmr. Most LED bulbs have protection for this in the engine, (the regulator/stabilizer as you call it), called over-voltage protection. This is probably whats causing the bulbs/transformer to fail. The problem is, especially with transformers, is that you must match the load. If the transformer is expecting a specific load and you give it something it can't handle, it'll either destroy the load or damage the transformer. The easiest way to avoid this is to always match the power of the original load to the load you intend to put in. 40W of halogens should be matched with 40W of LED. This is the gimmick with retrofit bulbs like the MR-16. You're not really saving any energy when you use retrofit bulbs. You just get a longer bulb life and a lot more light from the same power draw. LED lighting is a niche market. If you can't figure it out, wait a few months and LED lighting fixtures will decrease as the market is flooded with new product and becomes more competitive. I'd recommend investing in something like that instead of retrofitting.

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