40MVA/110KV generator startup/standby transformer

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Place of Origin: HeBeiBrand Name:


Model Number:




Phase: 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 40MVA/110KV generator startup/standby transformer, 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 200-490 tons, and due to the restricted transport conditions, the transportation becomes the critical issue for application of the 40MVA/110KV generator startup/standby 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 OLTC 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 OLTCTransformer’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 40MVA/110KV generator startup/standby 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 OLTC Transformer products.


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Q:What is the difference between the SGB10 transformer and the SC (B) 10 transformer?
Both transformers are dry transformers. 1, SG (B) 10 is an open dry change, he used the United States DUPONT company's NOMEX insulation paper insulation (high voltage coil, you can see is white, if it is darker that is covered with glass wire The former is American technology, the latter is German technology.) The low voltage coil is a copper foil (there is a B in the model that is made of copper foil). The same is true of B in the SC (B). High and low coils are insulated with VPI (vacuum pressure dipping). The surface of a layer of epoxy resin insulation paint wrapped up. 2, SC (B) 10 model means that the epoxy resin pouring dry change (low pressure is copper foil). The high voltage coil is sealed with an epoxy resin, but the low pressure coil epoxy is hard to pour in, but at the end of the coil is sealed with an epoxy resin. 3,10 is the design serial number, representing the loss standard value. 4, there is a dry change, model SCR (B) 10, he is non-epoxy resin casting package. All with NOMEX paper plus silicone encapsulation is the French technology. This product yield less, better quality. Maybe the price will be higher. You can also look at it. 5, is currently in the country is the three kinds of technology transformers. Epoxy resin pouring products are mostly "F" class insulation level, a few also have "H". SG (B) 10 majority is "H" level. , A few are "C" level. SCR (B) 10 is "H" level. If you still want to know what, you can give me a message.
Q:630KVA transformer can use the maximum number of power appliances
General transformer power factor is 0.85 or so 630X0.85 = 535.5KW, you should be installed capacity of 590KW, if it is not necessarily open at the same time, there is no problem. On the contrary, you can also increase the capacitor to improve the power factor to run .300KW If not more than 150 meters, then available 3X120 +50 copper cable, the distance from the increase in the line by.
Q:TN-S system in the transformer side pe line and n-line neutral point how to take
In the transformer side of the PE line and N line are connected to the transformer shell conductive part. TN-S for the power neutral point directly grounded electrical equipment exposed conductive part of the zero line through the grounding of the zero protection system, N for the work of the zero line, PE for the protection of the ground wire, that is, equipment connected to the PE housing.
Q:How is the insulation of the transformer divided?
The distribution of the impulse voltage on the winding is usually used as the basis for the design of the longitudinal insulation of the winding, but the inter-turn insulation should also take into account the effects of the long term power frequency operating voltage.
Q:100kVA transformer can withstand much of the current? What is its formula?
For safety insurance, the current density is about 3.0, S = 144.34 / 3 = 50 (about) So take the 50 square cable can be.
Q:Transformer parameter interpretation
I, temperature rise and cooling: transformer winding or the upper oil temperature and the temperature difference between the ambient temperature of the transformer, known as the winding or the upper oil temperature rise. Oil-immersed transformer winding temperature rise limit of 65K, oil surface temperature rise 55K. There are a variety of cooling methods: oil from the cold, forced air-cooled, water-cooled, tube, chip and so on. J, Insulation level: Insulation class standard. Insulation level of the method for the following example: high voltage rated voltage of 35kV level, low voltage rated voltage of 10kV level transformer insulation level expressed as LI200AC85 / LI75AC35, which LI200 said the transformer high voltage lightning impulse withstand voltage of 200kV, power frequency withstand voltage For the 85kV, low voltage lightning impulse withstand voltage of 75kV, power frequency withstand voltage of 35kV. Oaks High Technology Co., Ltd. The current oil-immersed transformer product insulation level LI75AC35, said the transformer high voltage lightning impulse withstand voltage of 75kV, power frequency Withstand voltage of 35kV, because the low pressure is 400V, can not be considered. K, the connection group label: According to the transformer one. Secondary winding phase relationship, the transformer winding connected into a variety of different combinations, known as the winding group. In order to distinguish between different groups, often using the clock representation, that is, the high voltage side of the voltage phase of the clock as a long needle, fixed on 12, low voltage side of the phase voltage as the clock short needle, (A) is a (triangular) joint, and the secondary winding is a (star) junction with a center point, and the group number is (11).
Q:10KV distribution transformer how to calculate the tap voltage
To 10 ± 5% of the gear, for example, the transformer for the third gear, each level gear can be adjusted 10000 × 5% = 500V, then Ⅰ file tap voltage 10000 +500 = 10500V, Ⅱ file tap voltage 10000V , Ⅲ gear tap voltage 10000-500 = 9500V
Q:Production of high and low voltage switchgear transformer industry belongs to what industry category
Electrical, power distribution equipment? On the "switch talent network" or "electrical excellence network" to check it.
Q:From the variable ratio to determine whether the transformer is boost or buck
High pressure to low pressure is the buck, and vice versa is boosted. That is, the input transformer is a high voltage, the output is a low voltage is a low voltage.
Q:My device has 50KW should be used with much transformer
On the use of 50KVA transformer on the line, because your device will not appear at the same time the maximum power.

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