25MVA/110kV railway balance traction transformer

Ref Price:
Loading Port:
Payment Terms:
Min Order Qty:
1 pc
Supply Capability:
1 pc/month

OKorder Service Pledge

Quality Product

Order On-line Tracking

Timely Delivery

OKorder Service Pledge

Credit Rating

Credit Services

Credit Purchasing

Share to:

Product Description:


Quick Details

Place of Origin: HeBeiBrand Name:


Model Number:






Coil Structure:


Coil Number:

3 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 25MVA/110kV railway balance 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 25MVA/110kV railway balance 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 25MVA/110kV railway balance 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.


Send a message to us:

Remaining: 4000 characters

- Self introduction

- Required specifications

- Inquire about price/MOQ

Q:The difference between transformer power kva and kw
KVA is apparent power, kW is active power. inspecting power: S = 1.732UI = 1.732 x 0.38 x 1000 ≈ 658 (kVA) Active power: P = 1.732UI cosφ = 1.732 × 0.38 × 100 × 0.8 ≈ 526 (kW) AC power, power divided into three kinds of power, active power P, reactive power Q and apparent power S, at any time these three power always exist at the same time.       The cosine of the phase difference (Φ) between the voltage and the current is called the power factor, denoted by the symbol cosΦ, where the power factor is the ratio of the active power to the apparent power, that is, cosΦ = P / S       Three power and power factors cosΦ is a right-angle power triangular relationship: two right-angled edges are active power P, reactive power Q, and oblique edge is apparent power S.       S² = P² + Q² S = √ (P² + Q²)       Apparent power S = 1.732UI       Active power P = 1.732UIcosΦ       Reactive power Q = 1.732UIsinΦ          DC = P = UI = U² / R = I²R
Q:Transformer question - VA vs True power?
Lots of people don't understand this rating, but it is not that difficult. The power rating of a transformer is limited by the losses in the transformer; these are core losses and wire losses. Core losses are a function of voltage and more or less fixed. Wire losses are I^2 R where I is the RMS current. Obviously, these are a function of the current squared. Now the bad news is that the VA rating of the transformer is not the same as the power rating except when the current is purely sinusoidal. This means that in case where there are rectifiers, the RMS current will be much greater than the average current, so the output power will be much less that the VA rating.
Q:10 (6) What is the meaning of 10 and 6 in the KV transformer?
One, 10 (6) KV transformer in the actual use of mostly oil-immersed transformers. It is also a distribution transformer, one of the important equipment in the industrial and mining enterprises and civil construction power supply and distribution system, it will 10 (6) kV or 35kV network voltage to the user to use the 230 / 400V bus voltage. 2, 10 (6) KV transformer 10 and 6 refers to the transformer primary side (input) voltage level is 10kV or 6kV. That is what we usually call the voltage of the high voltage line. It is mainly to 10 (6) kV network voltage down to the user to use the 230 / 400V bus voltage, which is commonly used in our 220 volts and 380 volts AC.
Q:Transformers 2 disappointment?
Same way, but for different reasons. There WAS acting, but it was over-acting. About a thousand times more than the first one. And now it's not just the pitiful human actors (namely Sam's new roommate, and again his parents) doing the over-acting, but the Transformers themselves: little former radio-controlled truck, Wheelie, somehow inherently born a Decepticon for no reason at all who talks smack at every chance. The Autobot twins, Skidz and Mudflap, no explanation needed. And the story was ridiculous. It was as if they had three or four plots and screenplays in front of them, then diced them up, tossed 'em in a hat and shook 'em vigorously, then glued it all back together in one heaping mess. As for action, that's what I showed up for. And ironically didn't feel there was enough of. They advertised an action-packed summer thriller with suspense and destruction, and instead they crapped out a comedy. Nice job, Bay. Now go away.
Q:What are the advantages of an 11/132 kV transformer over an 11/33 kV transformer?
The new transformer is connected to the transmission grid at higher voltage level (132 kV) vs the old one (33 kV). This implies the increase in power rating (MVA). The old voltage level 33kV was too low for supplying the increased power demand. In addition, by removing the 33 kV voltage level, one step in the transmission chain has been removed. I am assuming that, in the old configuration, in addition to 11/33 kV transformation there was a 33/132 kV voltage transformer(s) somewhere between the smelter substation and the high voltage transmission grid. Three main benefits are: higher capacity, lower losses and minimization of number of voltage levels in the substation reduced costs of operation and maintenance.
Q:I took a transformer out of an old radio i want to use it as a shocking device?
You're already dead in the water trying to make a transformer work with DC power. You'll need AC, or at the very least pulsating DC.
Q:Know the rated capacity of the transformer, how to calculate its rated current?
Low-voltage 400V distribution transformer speed calculation: per thousand volts by 1.44A, per thousand kVA of 144 ac current calculation. Formula algorithm: Three-phase transformer current I = Pe / Ue / √3 Single phase transformer current I = Pe / Ue
Q:AC Transformer & Circuit Board Problem?
The Sandshark nailed it. Tell your handy man he's on the hook for the 3rd control transformer AND the 2nd circuit board. Then tell him to hit the bricks. Now do what you should have done in the beginning; call a qualified, COMPETENT technician.
Q:Electric transformer?
What you have, in actual fact, is NOT a transformer but an electronic power supply that has been called a transformer by convention. In this situation, neutral /or live may exist. If supplying incandescent lighting (which I suspect you are), having these reversed is not a problem. Such transformers stop working for a few reasons: 1] they are too small for the load. 2] dimmers are used whereby they shouldn't be used with the type of transformer you have. 3] they are overheating due to being surrounded in thermal insulation (fibreglass etc). 4] they are of a cheap design. 5] the power supplied to them is unacceptable (voltage, waveform etc). To safely disconnect a lamp that is connected to the output of this transformer, the circuit breaker supplying the device must be switched off. If you do not wish to immediately connect anything to these bare wires, they must be insulated from any other contact. This can be achieved with the use of wire nuts (American devices), which are not permissible in Australia I dare say, also the UK (for very good reasons). The alternative to a wire nut is an insulated connector that has screws to facilitate a good connection. Once this connector has been applied correctly, it must be taped with PVC tape. Generally, this can only be done correctly by an electrician. If you are in the UK, you will have similar rules to that of Australia, whereby only qualified people can deal with such things.
Q:Auto Tapping Transformer?
Thank okorder

1. Manufacturer Overview

Year Established
Annual Output Value
Main Markets
Company Certifications

2. Manufacturer Certificates

a) Certification Name  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port
Export Percentage
No.of Employees in Trade Department
Language Spoken:
b)Factory Information  
Factory Size:
No. of Production Lines
Contract Manufacturing
Product Price Range