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: Electrical Machinery, Electric Machines, 3-phase transformers: If by 3-phase bank you mean an array of two or three separate single-phase transformers, wired to handle 3-phase voltage changes, the 3-phase transformer will require less iron and copper to handle the same power.

Q: How much capacity the transformer has: For power transformers, there are 10 20 30 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300, etc. kVA.

Q: Does anyone know where I can buy Transformers in Bluray? I have looked for it everywhere and can't find it and I need it for a Christmas gift.Thanks!: The Transformers movie is not available on Blu ray. For some reason the people at Dreamworks decided not to release it on Blu Ray.

Q: I have a 240v-5v transformer for recharging, and it makes an annoying very high-pitched squeaking noise. What causes the noise?: SQUEEK? That sounds like a high (audio) frequency oscillator. So this sounds like a pulsed regulator, not like a transformer-type power supply. I would guess that your unit is measuring the battery voltage, then applying a pulse of power to charge the battery, then checking the voltage again in a continuous sequence. This would be a switching type charger. 5 Volts - sounds like a personal electronics unit, for instance a cell phone or personal entertainment. Right? 240 Volts - Sounds like Europe. Right? (In America it would either be 120 Volts or some switching supplies are designed to operate from 90 to 250 Volts.)

Q: I am learning about transformers and one of the items to calculate is the impedance. I need to calculate regular 60 Hz Core and Coil Shell Type Transformers Al wire in secundary, Cu Wire primary and use Epoxy paper for insulation.: It's pretty difficult to calculate the impedances (there's more than one) entirely from the transformer's design data. It's easier and more usual to decide on an equivalent circuit (there are plenty available depending on how well you want to model the transformer) and then to determine the parameters by a mix of calculation and measurement. A pretty basic equivalent circuit which refers all impedances to the primary side, has the primary terminals connected first by Xm and Rc in parallel (the magnetising reactance and core loss resistance) and then by a third parallel branch containg a series connection of leakage reactance Xl, winding resistance Rw and an ideal transformer of turns ratio Np/Ns. Xm is best obtained from an open circuit test but could be calculated as the inductance of the primary winding. For the latter you'd need to know core dimensions, number of winding turns and the magnetising characteristic of the core iron. If you have conductor sizes and conductivities you can calculate the winding resistance Rw, referring the secondary part to the primary by multiplying it by (Np/Ns)?. You can deduce Rc from the losses measured on open circuit at nominal voltage and Rw from dc resistance measurements on the windings. If you know the specific hysteresis and eddy current losses of the core material, you can also have a good stab at calculating Rc. The leakage reactance is quite difficult to calculate from first principles - even designers usually resort to some empirical factors. Basically it's determined from the short circiut test which is at nominal secondary current. The ratio of primary volts to secondary surrent (referred of course) on secondary short circuit will get you close to Xl - you can adjust for Rw which can be determined from the losses on short circuit (core losses are absent here!) or by the two methods indicated above. It's normally Xl that's referred to as the transformer reactance and together with Rc and Rw, the impedance.

Q: What is the vacuum impregnation of the transformer?: To complete the winding and core assembly of the transformer, into a special dipping tank, the first vacuum, then open the lacquer,

Q: I have a transformer with serial number T.K.K EHT 66001 S-2. I confused with input (primary) wires. it has 5 wires (white red brown yellow and blue). which wires is used for 220 vac?? please help.: It looks like you MAY have an auto-transformer, ie only one winding. Off hand, I would say the white is supply live and blue the common return. If you measure the DC resistance of White to all the others and record reading. Then red to all others as above and same with brown, yellow and blue. The pair with highest reading Should be the primary, it doesn't really matter which is live or neutral, as long as you take the return of the secondary to the neutral. The other 3 wires will give you 3 different voltages with respect to neutral, however the EHT in the serial No. May indicate Extra High Voltage, which is not 220v. by any stretch of the imagination. Is there no information whatsoever on the transformer itself? Clear as MUD I know, but I'm not good at explaining things. Your meter should be at the lowest range, as this is DC resistance you are measuring, not AC.

Q: I am in 10th grade now, taking the IB next year, and I would like to know if a Transformer is good for things like taking notes in class, and working on projects that we might be allowed to work on in class. I would still have a full computer at home for more serious editing, but I would just like to know if the Transformer TF300 will be good enough for school. Also, I am not only talking about this year, but also the IB, which - if you know it, and I hope you do - will be more work and I would like to know, again, if the Transformer is up to that task.: (warning : poor English) Yes, Transformer Pad TF300 good for school. 1. It have a keyboard (optional), you can take notes faster. 2. Likes all others (pads), there have camera, you can take a photo of the board (if teacher allowed). 3. TF300 battery life quit good, with the keyboard even better. 4. We will work in cloud computing in the near future (or now) mostly. Google drive meet your needs for word processing, drawing, creating simple spreadsheet. you can share your works, or finish your project collaboratively with your group members via internet. 5. the chips: Tegra 3 is responsive, the screen: 10 (1280x800) is comfortable, the OS: Android 4.0 is more suited for tablets and it's a better os overall, the brand: ASUS, manufacture the best Android tablet (imo).

Q: I have been told by multiple people variable transformers reduce amps and volts simultaneously, Since transformers reduce amps to increase volts, how is this possible?also, if i want to reduce amps while maintaining volts for a source of 10 amps at 120 volts could i connect a variable transformer and reduce the source to 60 volts and 5 amps, then run that output to a step up transformer at 120 volts and 2.5 amps and then connect this to a 1200 watt electromagnet, will it only draw the 300 watts provided at 120 volts and 2.5 amps? or will it draw as much current as it can?: variable transformers reduce amps and volts simultaneously Transformers, variable or otherwise, reduce or increase voltage. The current is determined by the load. So if the load is linear, when you reduce voltage, you will reduce current. transformers reduce amps to increase volts True in one sense, but don't take statements like this to be always true under all conditions. You can use a transformer where you need more current at lower voltage, true. BUT, with a fixed load, if you reduce voltage, you reduce current. Of course, this means the input current is reduced even more. Your last paragraph is totally meaningless, sorry. You apparently have no idea of what voltage and current mean. edit: ALL I WANT IS TO CONTROL CURRENT INDEPENDENT OF VOLTAGE With a given voltage, the current is determined by the load. If the load is fixed, then you cannot vary it except by varying the voltage. PROBLEM IS THE ELECTROMAGNET IS SUCKING TOO MUCH POWER AND OVERHEATING Then you need to increase the number of turns, which will reduce the current. You may need to reduce the wire size also to get the number of turns you need.

Q: I have a transformer of 12060 Volts and a transformer of 15000 Volts, both neon-sign types; if I wired them together, would it amplify the output voltage or have a catastrophic effect that would end the world as we know it?But really, can I wire them together for an added effect of some kind?Thanks.: Yes the PS and PS 2 are likely problems. The switching type are likely rare for this high a voltage. Use the transformer with the broadest surface as the base and mount the other at least two inches 5 centimeters above it with very high voltage electrical insulators. This MAY reduce the problems with leakage to the case and excessive stress on the internal insulation. Connect the primaries in parallel; the secondaries in series and you MAY get 27000 volts, perhaps MORE. Be prepared to cut the power quickly if either transformer makes arcing sounds or smokes. Be careful, these transformers often give DEADLY shocks. My advice is sell them cheap on E BAY before they put you in an early grave. Neil

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