400MVA/220kV main transformer power plant

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Quick Details

Place of Origin: HeBeiBrand Name:

CNBM

Model Number:

 

Usage:

Power

Phase:

one

Coil Structure:

Toroidal

Coil Number:

2 Winding

Capacity: Rated Voltage:

400MVA/220kV

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 400MVA/220kVmain transformer power plant can significantly improve the economy of the OLTC substation, and matches well with the transmission capacity of OLTC 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 400MVA/220kV main transformer power plant. In order to make the products applicable to any OLTC substation in our country, the state grid of corporation of China set the "A study of easy-transport large capacity OLTC 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 OLTC 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 OLTCtransformer 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 OLTC Transformer’s right at the first time once again filled the gap in the field of OLTC transformer research after Chinese transformer industry overcame the difficulty of integral transport of 400MVA/220kV main transformer power plant, 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 OLTCconstruction application in our country, greatly improved the technical level and manufacturing ability of BTW in terms of OLTC Transformer products.

 

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Q:What are the specifications of the transformer capacity?
The choice of transformer capacity has a great impact on the comprehensive investment efficiency. Transformer capacity selected too large, there "big horse car" phenomenon, not only a one-time investment, no-load loss is also large. Transformer capacity selected too small, transformer load loss increases, economically unreasonable, technically not feasible.
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:Which 2 Shooters should I buy this fall: Halo 4, BLOPS 2, Transformers FOC?
Definitely Halo 4. I'm kind of burnt out on CoD right now so I'd go with the new Transformers. I agree that War for Cybertron was fantastic. I had really low expectations of it when I rented it, but it turned out to be great! It's online multiplayer is really fun too.
Q:Transformer question (physics)?
No. A transformer is impossible with out inductance. Inductance happens only once, is over quickly, and it is not continuous with DC. With AC inductance is continuous. Therefore the transformation is continuous with AC.
Q:please help physics transformer?
No, it can't. If it is connected to 120VDC, the output will give an initial pulse that decays to zero and stays there. The input will draw far more current than designed, overheat, and either open up or catch on fire. Here is how a transformer works with AC: The input winding generates a magnetic field (because it is an electromagnet). The field alternates because the applied current alternates. The alternating magnetic field couples into the output winding where it induces an electric voltage that alternates because the magnetic field is alternating. Now here's the kicker. The voltage induced in the output winding is proportional to the rate of change of the fluctuating magnetic field. If the field is static (ie, steady, as is the case if the input winding is powered by DC), then the rate of change is zero and the induced voltage is zero. That's why the transformer can't transform DC. Other interesting facts: The input winding converts electrical energy into energy in the magnetic field that is then converted back into electrical energy in the output winding. The input winding resists DC current based on the winding's resistance. If the input current is alternating, then it resists the current additionally based on the inductance of the winding, and the higher the frequency, the more it resists. A transformer is designed to work on a specific frequency (eg, 50Hz or 60Hz). Operating it at 0Hz (DC) will allow too much current to flow. The higher the applied frequency, the more power the transformer can transfer. Think of it as though the transformer passes a bucket of energy from input to output on each cycle. The more cycles per second, the more energy per second, aka the more power. At 0Hz (DC), it isn't passing any buckets of energy. Hope that helps.
Q:Step Down Voltage Transformer / Regulator?
If each leg of the 240v circuit is 30 amps, you won't need a transformer at all. There are travel kits for going to foreign countries that have a variety of adapters for plugging into 240V outlets that only use one leg of the circuit, which is 120v. Find the adapter that fits your outlet, and you will be up and running! DO NOT TRY TO MAKE SUCH AN ADAPTER YOURSELF UNLESS YOU HAVE A DEGREE IN ELECTRICTY/ELECTRONICS! Using a transformer involves balancing the load, getting a transformer that is rated for the current, a lot of worms in that can. There are also adapters available to stabilize the current, they are available wherever compurers are sold.
Q:design a quarter wave transformer to match a 73 ohms antenna to 300 ohms transmission line fed by a 100MHz FM?
Transformer impedance required: sqrt (73 x 300) 147.986 (say 148) ohms. The 1/4 wavelength in air is (75/100) 0.75 metres. You have not stated what you are using for the transformer, so you will need to allow for its velocity factor. But the transformer could be 0.75 metres of parallel rod spaced as required for the impedance. I am also assuming the antenna is balanced (sounds like a folded dipole).
Q:Why does the transformer have three lines
You see how it is connected to the law ah ~ which is connected to the power supply is the power cord ah ~ may also be the designer in order to be able to work at 220 and 110 (some countries are 110) and designed. Why did he do so?
Q:Transformer cooling method AN stands for what
The cooling mode of the transformer is determined by the cooling medium and the circulation mode. Dry-type transformer cooling method is divided into natural air cooling (AN) and forced air cooling (AF); oil-immersed transformers commonly used cooling methods are generally divided into three types: oil-immersed self-cooling, oil-immersed air-cooled, forced oil circulation.
Q:why transformer draws lagging current in summers?
A transformer on open circuit is just an inductance and that will draw a small lagging (magnetising) current in that operation mode. On load, the phase of the current drawn will depend on the load. If the load is capacitive then the transformer may well draw a net capacitive current. The small inductive contribution due to the magnetising current will still be there but may be subordinate to the load. The season is of no significance.

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