32MVA/220kV main transformer power plant

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Place of Origin: HeBeiBrand Name:


Model Number:






Coil Structure:


Coil Number:

2 Winding

Capacity: Rated Voltage:


Connection Symbol:

YNd11 Dyn11 YNyn0d11


Cover type or Bell type


MR or ABB or SMS

Packaging & Delivery

Packaging Detail:Mainbody --naked Disassembled parts -- crate
Delivery Detail:3 months



1. CESI certificate
2. High short-circuit withstand
3. Low loss, PD and noise
4. CTQC certificate
5. No leakage




The application of 32MVA/220kV main 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 32MVA/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 32MVA/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:Transformers, where to start?
Q:how to construct a transformer?
The short answer is – don't. Unless you have access to exactly the right materials and equipment, not to say the right knowledge and design tools, you are risking a nasty accident if you try to make your own mains transformer. If you want to experiment with making a transformer, choose one that operates at low voltage (25V or below on both primary and secondary) and remember the following basic design rules: (1) The voltage ratio Vpri : Vsec equals the turns ratio Npri : Nsec. (2) The primary inductance Lpri must be such that its unloaded reactance, 2pi x fLpri (where f is the operating frequency in Hz) is high enough to make it look like an open circuit when there is nothing connected to the secondary. (3) To calculate the primary inductance you will need data, and possibly software, supplied by the makers of the transformer core. (4) The core must be big enough not to saturate under the proposed working conditions. (5) The windings must be able to carry the proposed curents without excessive heating. Remember that heat cannot easily escape from the windings, so the normal ratings of wire to be used in fresh air do not apply. The current ratio Ipri : Isec is the inverse of the turns ratio, i.e. Nsec : Npri. (6) You need insulation beteen the windings and the core and between the primary and secondary. This is an insurance against failure of the insulation varnish on the windings themselves. (7) The core opening(s) should be just big enough to accommodate the windings, but ideally no bigger. Once you have built a couple of successful low-voltage transformers, you might consider upping the voltage, but do read more about it first. Meantime, if you want a 5VA mains transformer, they are really cheap to buy.
Q:Is this the correct way to wire this transformer?
Do you have a volt/ohm meter? If you do, with the transformer unplugged from any AC source, take the ohm meter and measure the amount of resistance in the black/white AC input leads; then see if there's continuity between those wires and the long white wire coming off the same side of the transformer as the AC input leads. Then take the ohm meter and measure the resistance between the single output lead and the green wire. Also check to see if there is a meter reading between the output lead and the AC input wires. If there's readings between all transformer wires, you probable have what is called an Auto-transformer. The output is tapped from one secondary winding common to both AC input and HV output. Did you take the manufacture name and model number off the transformer and do an Internet search to see if there might be an online circuit diagram? ------------------ If all else fails, make sure that all the wires from the transformer are not accidentally touching or anything and that they are situated well apart from one another, then hook up AC voltage into the transformer. Don't attempt to measure any voltages with your meter. Most likely it will not read voltage that high. Be very careful, the voltages on that transformer can HURT YOU seriously. Do not fool with the transformer leads with AC voltage applied to it. Plug in the AC voltage and observe the transformer. If nothing starts popping and smoking, it probably functining alright. Unplug the AC from the transformer. Even if the transformer was defective and shorted out internally, all it would do is cause a circuit breaker in your house to kick off. Simple matter of disconnecting the AC from the transformer and then reseting the circuit breaker. Be careful. That thing isn't a toy, and if you don't understand what your doing, that thing will hurt you or worse.
Q:Resistor in series with transformer primary?
if it has any noticeable effect, then it will get very HOT and burn out Transformers are basically lossless (95%) so adding resistors is basicaly stupid
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:Power is generated at genaration station with 33kv,then by using step up transformer the voltage raises to?
The 440 kv is first reduced to 69Kv then down to 33kv and down to 23 kv and stepped down to 220 or 440 volts AC.
Q:150KVA transformer can withstand much power, how to calculate
The power unit is watts (W). Power = current * voltage 1A * 1V = 1W Then 150KVA = 150KW that is 150 kilowatts!
Q:Why is the notebook computer transformer hot?
I bet, your power certainly no my hot ,,, my power is my friend's hottest, But you do not have to, but it is normal ah ,,,, different brands, the temperature is not the same .. Generally good power are temperature control, to a certain temperature to turn off the power, I was like this, do not worry But do not plug in the socket for a long time, and will burn the power, and there is easy to thunder in the summer ,,, will burn out ...
Q:Indoor/outdoor distribution transformer?
Thank you for all the answers!
Q:How can I use a range for the US at 220v in China at 220v? Step down transformers x 2?
No need, 240 volts work on both types. The frequency makes a difference in the motors. not so much for heating. Any electronics may be damaged by the difference because the transformers need the center tapped 240 to make 120 to run. Much easier to purchase a new one there, and it is probably cheaper than the transformers and less problems for a service call.

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