150MVA/345kV three phases self coupling generator interconnection transformer

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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 the 150MVA/345kV three phases self coupling generator interconnection transformer.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 150MVA/345kV three phases self coupling generator interconnection transformer. 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 150MVA/345kV three phases self coupling generator interconnection 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 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:Transformer Uk = 4.5% What does it mean?
The short circuit impedance of the transformer is related to many factors of the transformer. Such as transformer capacity, loss, internal coil structure and so on. But once the transformer is manufactured, it is the same. Short-circuit impedance is a very important technical indicator for the user. Such as the stability of the power supply system, the quality of the power supply, the transformer in parallel after the safety and reliability, and so have a relationship.
Q:Can i used scott t transformer with welding machine ?
When you say you have a 2 phase welding machine, that is not enough information to answer your question with a reasonable margin for success. If your welder is indeed a two phase machine, where the phase angle relationship between phases is 90 degrees and not 120 degrees, and you have a three phase service whose phase relationship is 120 degrees between phases, it is possible to build a Scott T transformer bank that will give you a 2phase 4 wire system. You will need two transformers. One of the transformers will need a center tap on its primary winding brought out and the other transformer will have to have a tap at 86.6% of full winding voltage brought out of its primary windings. Also you will only be able to get about 58% of the nameplate capacity from the transformers for the same reasons you get 58% from an open delta transformer connection for three phase. These will be special made transformers, unless you are winding them yourself, and will be expensive. I suspect they and the special connections you will have to make, will exceed the cost of a new 3 phase welder. Last but not least, if indeed your welder draws 40 amps per phase using a three phase circuit you presently have, other alternatives present themselves. Such as a larger three phase service to allow for the 40 amp load. Also you might consider at least one transformer with a center tap primary and the second one without the 86.6% tap. The secondary will be slightly out of balance due to the higher voltage on one set of secondary (about 14% higher) but it may work for the welder. Hope this helps, Newton1Law
Q:Transformer sales channels
1. Power supply company tender 2. Cabinet manufacturers 3, the installation company 4, direct customers, to the planning bureau to find, in advance to know which new project 5, design institute, know some late 6. Power supply company front desk, people come to install more late
Q:Transformer secondary side is high pressure or primary side is high pressure
Step-down transformer primary side is high pressure, secondary side is low pressure. The step-up transformer is just the opposite. Step-down transformer reverse use is the step-up transformer.
Q:What is the vacuum impregnation of the transformer?
so that the transformer immersed in vacuum under the conditions of the paint, so you can rule out the bubble inside the winding, increase Insulation performance. Dip out after drying.
Q:Low volts transformer question?
600 W.
Q:doorbell transformer problems?
It could be the switch as well! Unless you know about electricity, you would be better off hiring a handyman!! Or ask around, if a neighbor asked me I would help them out!
Q:Power transformer parameters
B. Transformer efficiency: In the rated power, the transformer output power and input power ratio, called the efficiency of the transformer, that η = (P2 ÷ P1) x100% where η is the efficiency of the transformer; P1 is the input power, P2 is the output power. When the transformer output power P2 is equal to the input power P1, the efficiency η is equal to 100%, the transformer will not produce any loss, but in fact this transformer is not the transformer transmission power always produce loss, this loss is mainly copper Loss and iron loss. Copper loss is the loss caused by the transformer coil resistance.When the current through the coil resistance heat, part of the energy into heat and loss.As the coil is generally wrapped with insulated copper wire, so called copper loss. The iron loss of the transformer includes two aspects: First, the hysteresis loss, when the AC current through the transformer, through the transformer silicon steel wire magnetic field its direction and size changes, making the silicon steel sheet internal friction, release heat, Part of the energy, which is the hysteresis loss. The other is the eddy current loss, when the transformer work, the magnetic core lines through the line, and the magnetic lines perpendicular to the plane will produce induced current, because the current self-closed loop Circulation, and into a spiral, so called vortex. The presence of eddy current heat, energy consumption, this loss is called eddy current loss. Transformer efficiency and transformer power levels are closely related, usually the greater the power, loss and output power is smaller, the higher the efficiency, otherwise, the smaller the power, the lower the efficiency.
Q:Transformer how to do no load test
Transformer no - load test 1, the transformer no-load test power capacity of choice: To ensure that the power waveform distortion does not exceed 5%, the test sample of the no-load capacity should be 50% of the power capacity; the use of pressure from the pressure, no-load capacity should be less than 50% of the regulator capacity; The no-load capacity should be less than 25% of the generator capacity. 2, no-load test is to measure the rated voltage under no-load loss and no-load current, test high side of the open side, low side pressure, the test voltage is low voltage side of the rated voltage, test voltage is low, the test current is rated current percentage A few or a few thousandths.
Q:Is it safe to use a table saw (UK, 220v) in America (110v), with a transformer?
You can do that. Just make sure the transformer is rated for the power they will draw. Keep this in mind: American homes are wired with 220 volts. Only, they split the voltage into two 110 volt legs. Each leg to ground (or neutral) is 110 volts (also commonly referred to as 120 volts). But from one leg to the other is where you get the 220 (or 240) volts. My garage is wired with two legs of 110, which means I have 220 out there. I also have an outlet for 220 volts. Because some of the power tools I run demand more current, and run them simultaneously, the standard 110 outlets struggle to meet the demand. So what I did was to take a dryer cord and wire it into a pony panel where I can draw 110 volts from one leg to ground to power a table saw while the other leg powers the dust collection system. To try and run both those pieces of equipment on a single 110 line means a trip to the breaker to reset it because each draws enough power that when used together they draw more current than the circuit is safely rated for. YOU can do something similar. Just make sure you use a 20 amp outlet meant for use with 220 volts and wire into the panel (if not already wired) and set up a 220 volt plug where you will be using these power tools. Using a transformer will work, but the more you couple the power magnetically the more inefficient your system becomes, and you waste power. Also consider just buying tools rated at 110 volts. They're plentiful and cheap enough that the cost may offset the cost of shipping these 220 v tools. Throw in the cost of a transformer and you're probably spending more money in the long run. Hope this helps. '')

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