250MVA/500kV main transformer power station phase

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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:	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 needto know the full conditions of parallel operation of transformers including details about vector groups.: I am putting 1 QA for reference. Question If I parallel three 2MVA 22/11kV three phase 50Hz Dyn11 transformers of the same voltages, vector groups and impedances, do I connect all three star points to earth or only one star point to earth? If I want to put a resistance in the neutral connection to earth (NER), do I only connect one which is common to all three or a seperate NER for each? Answer Dear Dario, I will start with the imepdance: every transformer shall have its own because it is there to protect against internal faults as well. You may install only one impedance but that will depend on your protection devices and what they measure, i.e. where you put your CTs and VTs. These impedances must have a disconnect switch. For the first part, it is very general to me but i figure your load is large Medium Voltage motors (a mill), because 2MVA seems little for distribution and a Y secondary in MV is tricky. All neutrals shall be interconnected and connected individually to earth. This is for the case where the only link you have in mind is gone, the whole system will go float; so again, for the first part: all three star points shall be connected. If you're already protected against lightning, then you don't need limitation in surge voltage, i advise not to install a resistor and not connect N to E, i.e. go for an IT system which provides you with two benefits: fault currents are small and it take more than one fault to trip and cause discontinuity to the service,

Q:I would like to input DC9V voltage into 12V, 15V multi-channel, how to do the details of the master: Switching power supply is the use of modern power electronics technology to control the switch on and off the time ratio, to maintain a stable output voltage of a power supply, switching power supply generally by the pulse width modulation (PWM) control IC and MOSFET composition. With the power electronics technology development and innovation, making switching power supply technology is constantly innovating. At present, the switching power supply to small, lightweight and efficient features are widely used almost all of the electronic equipment, electronic information industry is the rapid development of an indispensable power supply.

Q:How does a step down transformer decrease the output voltage but increases the output current? And how does the step up transformer does the opposite thing?: Transformers function as electrical gearboxes to give an analogy. The product of current through the winding and voltage across the winding is the same for both the input winding and the output winding, due to conservation of energy. Transformers trade voltage for current, while, if ideal, preserving transferred power. The way a transformer works, is that when there is a changing magnetic field produced by the input winding (due to a derivative of current through this winding) induces a voltage across the output winding, as per Faraday's law of induction. Because of the self-inductance of the input winding, since it is after all an inductor, the voltages across both windings are both in phase. The higher the frequency used, the better and more efficient the transformer works. To make them work at lower frequencies, it is necessary to make bigger overall windings with larger inductance values. The stepping ratio is set by the number of coils of wire in both windings. The number of coils on the output winding divided by the number of coils on the input winding gives the stepping ratio. Should the stepping ratio be greater than 1, it is a step-up transformer. Should the stepping ratio be less than 1, it is a step-down transformer. Should the stepping ratio be equal to 1, it is called an isolating transformer.

Q:Exactly what is the storyline of the Transformers. As far back as I know, there were two brother, Unicron and Primus who fought each other because Unicron wanted to suck up Universes. But where did these two come from? Does it even say?: I am a fan but I haven't been able to find that out myself, if you find out let me know.

Q:What is the difference between transformer MVA and KVA?: Are transformers are in power units, like the difference between kilograms and grams, the difference between 1000

Q:I need to find a transformer that will convert 480 input to 240 output for a motor controller. Where can I get this type of transformer? I've only been able to find 120/240 transformers.Thanks.: you're looking for a step down transformer. as for where to find them, i'm not sure. try ordering online (OKorder or some of those electronic store) or Radioshack/the Source by Circuit city.

Q:I watch Terminator Salvation first, it was really good I thought. The best part of the movie, I thought, was when T-800 turns evil again and attacks John. It took both John and Kyle to beat T-800.But other than that, I didn't really enjoy Transformers 2. Neither did I make plans to watch it, and I thought they should've dropped Megatron as one of the villains again. I thought it was average.But which is the better sci-fi movie of the year? (I think Star Trek is, but that's out of the question.): Terminator Salvation

Q:Can the transformer be replaced with a component?: If you say the transformer is a small power frequency transformer, then you can use switching power supply instead. If the substation with high-power transformers, there is no thing to replace.

Q:I have two-way transformer (120Vlt;240V) that has a surge capacity of 2000W and a continuous capacity of 1600W. The transformer is plugged into my wall socket and is, on its output side, attached to a power surge protector that leads to six separate sockets. There are periods where not all six sockets are in use - in this specific case, the only appliance is a 50W fan - and my question is, does the transformer still eat 1600W off my meter and waste most of it as heat, or is it nice and intakes maybe only 60W and inefficiently converts it to the required 50W? If the company/model comes into question, I can only say the transformer is of Taiwan origin - the company logo is a 'Z' with small D intersecting the two parallel lines of the former letter, all against a blue background - and has a model number of TC-2000. Many thanks.: the thought is sure and NO. sure, by way of fact a transformers considerable coil has a undeniable resistance. Wattage used is a function of voltage cases modern-day. on the grounds which you recognize the enter voltage is a hundred and twenty V, in case you are able to degree the coil resistance you are able to calculate the present used. Multiply modern-day cases voltage and you get wattage. although, the character of a transformer is extra desirable than basically a trouble-free function of Ohm's regulation which you would be able to seem up on the internet. there is yet another function of a transformer that could desire to be further into the equation, and that i'm not an authority on that. although, this extra ingredient is talked approximately as Inductance. that rather skill that reckoning on the burden of the output, the enter wattage will replace, however not heavily. Suffice is to assert that a transformer it is plugged into the wall yet isn't working something DOES proceed to apply power. you are able to tell this by way of fact the transformer would be warmer than if it weren't plugged in in any respect. this is going on on the grounds which you're changing electric powered modern-day into warmth - you're making use of electricity. on your case, making use of a decrease wattage bulb (this difficulty LED) you will use much less power, yet will in no way be saving a form of electricity. If going green is the objective, you would be extra valuable off making use of a hundred and twenty v LED lights OR a low voltage device it is designed around using LED. to easily set up LED will consequence in little or no decrease fee rates at an exceedingly huge fee. LED lights isn't decrease priced. solid success. :)

Q:Why can autotransformers be used as safety transformers? Isolation transformer is a variable ratio of 1 transformer, why has a security role?: The high and low voltage side of the autotransformer is realized by tapping in a coil, and there is no magnetic connection between the two times and there is an electrical connection, so it can not be used as a safety transformer. Isolation transformer high and low voltage coil is separated, the only magnetic connection between the two there is no electrical contact, so the role of security protection.

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