31.5MVA/220kV single phase traction transformer

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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:		Rated Voltage:	31.5MVA/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 the 31.5MVA/220kV single phase traction transformer, 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 31.5MVA/220kV single phase traction 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 the 31.5MVA/220kV single phase traction 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.

Q: If you use a power transformer (120VAC to 12VDC) past its secondary amperage, will it burn up or will it just not supply sufficient power?: Try it and find out.

Q: 440 kv(Primary side) and then at the receving station its step down from 440kv(primary side of the step down transformer) 33 kv.in the tranmission line,between both the primary side of the transformers the voltage is 440kv.then how the power flows in tranmission lines?: Gawd I don't know where people go to school to make up rubbish about the power being too high for use in homes. Just get a few facts and make the rest up. Ok When electricity is generated in a central power station the electricity needs to be transmitted many miles. The most efficient way of doing this is to use as high a voltage as possible. So at the power station a transformer is used to convert the generated voltage into a high voltage for transmission. When the electricity arrives at the destination it is transformed back down to whatever voltage the end user requires. The reason for using the high transmission voltage is to reduce resistive losses in the cables. I'll give an example Suppose we need to go 100 miles and have a resistive load of 1 ohm/mile We need to deliver 1MW down to the end of the line and the end voltage required is 100V We'll ignore the voltage drop for the example, but you can do homework to take it into account. If we transmit at 100 volts then applying W VI we need I 10^6/10^2 10^4 amps We have 10 ohms in the transmission path so resistive losses are I^2 . R (10^4)^2 . 10 10^9 Watts That is one heck of a loss! Now, if we transmit as 100kV 10^5V then our current is now 10^6/10^5 10 amps Applying I^2 . R for our resistive losses we now get 10^2 . 10 10^3 watts You can see the VAST difference that stepping up the voltage for transmission does now for the transmission loss.

Q: hi can anyone tell me when installing/replacing a door bell transformer when switching off power supply at main source will that make it safe to work with the connections, it keeps telling us to turn fuses off well it dont have fuses its a circuit breaker. so do we turn circuit breaker off asweel as main supply into house. may be a silly question to ask but dont wnat any trips to A nad E lol thanks guys xxx: This Site Might Help You. RE: friedland d753 door bell transformer? hi can anyone tell me when installing/replacing a door bell transformer when switching off power supply at main source will that make it safe to work with the connections, it keeps telling us to turn fuses off well it dont have fuses its a circuit breaker. so do we turn circuit breaker off asweel

Q: Hello friendsi need transformer for my project (regulated power supply) i need 220 50hz ac input and 3 volt 50hz out put ac voltage is this possible.what is wattage of that rating transformer?thanks a lot: Watts rating of the transformer depends on the load. If you have a 10 amp load, for example, that is 10x3 30 watts, so you need a transformer a bit larger than that, say 35 or 40 watts. PS, you will probably not be able to find this transformer available. You may have to settle for a higher voltage, say 5 or 6 volts and reduce it by some other means, or by rewiring the transformer. .

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: What is the transformer capacity ratio? Capacity than 100%.: Transformer capacity is the power of the transformer, the capacity ratio is the power ratio, such as 1000KA transformer and 200KVA transformer is not suitable for parallel use. Capacity ratio = 5: 1 greater than 3: 1 Capacity than 100% -------- is the meaning of 1: 1 (such as 500KVA and 500KVA, 200KVA and 200KVA and so on. Transformer side by side conditions: ① to participate in parallel operation of the transformer must be the same wiring group. ② the primary voltage of each transformer should be equal, the secondary voltage are equal. Otherwise the secondary side of the circulation caused by overload, heat, affecting the load, and increase the power loss, reduce efficiency; ③ the transformer impedance voltage (short circuit voltage) percentage should be equal, or with load after the load distribution unreasonable. Because the large capacity of the transformer short circuit voltage percentage, small capacity of the transformer short circuit voltage percentage is small, and the load distribution and short circuit voltage percentage is inversely proportional to this will cause large transformer distribution load is small, the equipment is not fully utilized; and small transformer distribution of the load Large, easy to overload, limiting the parallel operation of the transformer with load operation.

Q: First of all, try not to be bias ;). My birthday is on December 19th, exactly the release date of the Transformer Prime, which is a great tablet, one I think surpasses even the iPad 2. With Steve Jobs gone and the new quad core installed in the Prime, would the iPad 3 be likely to be better than the Prime? Should I just wait for an iPad 3 if so? Thanks :)!: First of all, don't forget that the iPad 3 hasn't been announced and it will probably be a few months, at least, before it comes out. Secondly, there are sure to be spec improvements and additional features in the iPad 3. Whether they match up to the Transformer Prime, however, is anybody's guess. Third, I think the real decision should come down to if you want the Apple environment or the Google environment. Last I checked there are more iOS apps than Android apps, and if you have a Mac, iCloud is a nice thing to keep everything in sync across devices. I personally like iOS, its interface, and the way updates are delivered (as opposed to with an Android device, updates Google produces may not coincide with a new product release or may not be available right away for your device). On the other hand Android is more open, the integration with Google Calendar and all is great, there are less restrictions on what apps are allowed in the Android store, and if you are happy with Android then there's no real reason to wait for the iPad 3.

Q: Here I am building prototype transformers for testing, using 1 ft length aluminum conductors of 1/2 by 1/2 inch width square conductors. I am structuring the (aluminum square tube)windings(connected at corners by ordinary round copper wire) in return layer diagonals, ( the pattern set by odd magic square sequences) to establish maximum internal capacity in the windings. If the current in the windings is opposite between every internal lateral square facing, most of the external field around the windings is cancelled, but internally between the windings the magnetic loops will be in unison. I therefore wish to put insulated steel tube sleeves around the internal aluminum loops of the wiring array, for a very unconventional honeycomb type core transformer. I should be able to measure for eddy current output on any steel sleeve by shorting the ends of the outside steel segment with an amperage meter. A conv. secondary will also need copper loops wound lengthwise around the steel.: An AC transformer connects AmpereTurns in the Primary to AmpereTurns in the Secondary using the time varying magnetic field in the core. The maths for the size of the core is well established. If you double back on turns they do not count as part of your ampereturns - unless you shield the doubled bit. Such methods are used in shaded pole motors. The only way to lighten the Tx is to use higher frequencies in the core. This 'dumps' the magnetic energy into the secondary more often so you can use a smaller core (bucket of energy!) The magnetic field is always perpendicular to the current and hence so are the core loops (in a Vector Notation sense - not necessarily physically) If you introduce Iron windings in the windings space you will get bigger Ohmic Losses. I hope this helps - you obviously have a plan to make hyper-efficient Tx but they are already near 0.999 efficiency.

Q: I have a few questions about flyback transformers: How high of a frequency can they go without alot of losses?Can I get a negative High voltage by reversing the polarity of the primary?How can I make the flyback safe from the capacitive charge that it holds?: The flyback transformers used in TV's work at about 15000 hertz (the horizontal scan frequency). The transformers used in switching power supplies are smaller and work at a higher frequency, but they normally have a low voltage output. The transformer produces a high AC voltage, and a rectifier diode changes it to DC. Reversing the diode gives you a negative output. The picture tube provides capacitance to smooth out the voltage and holds the voltage for a while after the power is turned off. If you don't use a picture tube, you might need a capacitor if you want a steady output voltage. Shorting out the capacitor will remove the voltage.

Q: if the transformer in a wall charger steps down the voltage from my wall to 120V does this mean i could use it in the reverse direction as a step up transformer? I want to combine 4 car batteries making 48V and plenty of amperage, but what can i use to get it up to 120V for my 1/2 hp motor?: Truthfully you'd be better off setting up the batteries in series (for higher amperage) and buying a decent 12V power converter. Your two biggest problems will be if the batteries can handle the start up power surge generated by that motor and the power loss from converting the dc to ac in the converter.

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