250MVA/242kV three phase combined shell type transformer for hydro power station

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 1 pc

Supply Capability:: 1 pc/month

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Quick Details

Place of Origin:	HeBei	Brand Name:	CNBM	Model Number:
Usage:	Power	Phase:	three	Coil Structure:	Toroidal
Coil Number:		Capacity:		Rated Voltage:	250MVA/242kV
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 the 250MVA/242kV three phase combined shell type transformer for hydro power station.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 the 250MVA/242kV three phase combined shell type transformer for hydro power station. 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 the 250MVA/242kV three phase combined shell type transformer for hydro power station, 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.

Q: even in a dc transformer, the cause varying current though not in polarity, can cause a change in the magnetic flux linked with a coil.: Transformers okorder

Q: How many transformers are used in a hundred households?: Depending on the specific use of electrical power. First select the rated voltage of the transformer. The voltage on the high voltage side is equal to the voltage of the connected grid. The voltage on the low voltage side is 10% or 5% higher than the voltage of the low voltage side (depending on the voltage level of the transformer and the magnitude of the impedance voltage). Calculate the size of the load carried by the transformer (requires the maximum statistical load, the conversion of the operating load kW value into apparent power kVA). If two transformers are used, the capacity of each transformer can be selected according to 70% of the maximum integrated load. The transformer should be considered for the total load and leave the appropriate margin. Other brand name parameters can be combined with the appropriate consideration of the transformer product. For example: select 35 / 10kV transformer. Assuming a maximum load of 3500kW, power factor of 0.8, choose two transformers, capacity S = 0.7 × 3500 / 0.8 = 3062kVA, 3150kVA transformer can choose, the voltage ratio of 35kV / 10.5kV. Select the model from the catalog.

Q: How many times does a copper wire have to go around the input side of a transformer to get the necessary amount of magnetism from 110 volts?How thick does the wire around the transformer have to be if the input it 110 volts? Can it be one wire as thin as a garbage bag tie, or does it need to be as thick as the original wire, but stripped and coiled around the transformer core?: The number of turns required is NErms/(1.414 pi f B Ac) where Erms is the primary RMS voltage, f is the frequency, B is the peak flux density which is a function of the material, and Ac is the cross sectional area of the core. The current density in the wire and the physical size of the transformer determine the temperature rise due to I^2 R (and core losses). It should be less than 400 amps/cm^2.

Q: I have a friend who lives in a place that she converted to a liveable space at a movie studio complex; however, the space is right above the transformer used by the studios for power. At night we can sometimes hear some buzzing sounds. How dangerous is this? We've heard things like it causes cancer in the long run, and that it is simply not safe. Does she have to worry about it? She's been there about two years.: Transformers can produce powerful electromagnetic fields, but there is no definitive answer on the safety of living next to transformers. Some people believe the electromagnetic fields cause health problems, and others do not. Bona fide research on health risks has produced sometimes contradictory results. One thing is for sure, high capacity transformers occasionally explode if they get overloaded, but these types of transformers are not allowed inside of buildings.

Q: 440 volts should be as dangerous as 11,000 volts because a transformer does not dissipates power it just converts voltage into current, my question is if the power at the secondary region is the same why it is said that it is not as dangerous.: I haven't a clue as to who told you that. The lower voltage would tend to hold you to the wires, where the higher voltage would push you away. The only real difference is that the higher voltage could arc to you, where the lower voltage at the same distance would not.

Q: What is the reactive power compensation of the transformer?: Transformer reactive power compensation is to compensate for the transformer to form the power required by the electromagnetic field, the reason why called reactive power, because it is only exchanged, not consumed. Reactive and active in fact have the same physical properties, in the transmission and use of the process is not part of what is active, that part is reactive. But they are different, there must be other forms of power to be able to transform, no power is not needed.

Q: I'm building a ark welder and i know they get very hot, iv seen some people in ''the internet'' submerging their transformers in transmission fluid to keep em cool under excessively heavy work loads.My question is what effects does oil have on wire insulation?And what about the transformer varnish and core insulation wads and paper?: Transformers can be submerged in oil like the oil cooled transformers.The transformer varnish, cfore and paper can withstand transformer oil. Just use a clean transformer oil.

Q: can i use 12VAC 60w transformer for 12VAC 30w (3 10W) light?: Transformer rating is 60 watts ~ don't use total wattage over that. So with your three 10 watt bulbs, that totals 30 watts. Will be okay. You can actually use up to six 10 watt bulbs, or a total of 60 watts max. Been using light bulbs for 65 years !

Q: I understand US voltage appliances use 2 x 110v hot leads to make 220v @ 60 Hz. The voltage in China is 220v @ 50 Hz. Would I have to get 2 step down transformers to make 2 x 110v hot leads? I found transformers making 220v @ 50 Hz to 110v @ 60 Hz, but only one lead. How can I make it work over there? I understand there are ranges at 220v made specifically for Europe and China at 220v, but I love this range. I want to use this range made for the US in China. What would be the way to do this? Any help would be grreatly appreciated!: in the U. S., replace the skill in the electrical powered panel, get rid of the white twine from the circuit breaker that feeds that outlet and deploy it on the impartial buss then replace the receptacle from a 240 volt to a one hundred twenty volt unit of the mind-blowing ampacity If the 240 receptacle is a 30 or 50 amp score, then the one hundred twenty receptacle ought to additionally be an identical score, basically a distinctive voltage. The AC or despite you attempt to place in ought to have a twine on it which will determine the mind-blowing amp score you ought to have. If the breaker isn't an identical amp score, it might desire to get replaced to the mind-blowing score for the device. you ought to use a smaller amp score breaker yet no longer a greater one. If the 240 is 50 amp, then the one hundred twenty could be 50 amp, or smaller if the breaker and the receptacle are replaced. changing the breaker and the receptacle is extra fee-effective than a transformer.

Q: I can't remember the funny scenes from any the Transformers movies, especially 1 and 2.It's driving me nuts.I saw the third one just last week so I remember a couple of funny scenes, but other than that, no luck.If you can, could you please include a link to a video clip of the scene?Thanks so much! (:: When the car turns into bumblebee and the guy says to the girl its probably japanese

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