±800kV (HY14) of UHV converter transformer

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Quick Details

Place of Origin: HeBeiBrand Name:

CNBM

Model Number:

 

Usage:

Power

Phase:

Three

Coil Structure:

Toroidal

Coil Number:

3 Winding

Capacity:

50000 63000 80000 100000 120000 180000

Rated Voltage:

 ±800kV

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 ±800kV (HY14) of UHV converter transformer can significantly improve the economy of the UHV substation, 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 1500MVA/1000kV UHV AC 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 1500MVA/1000k 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.

 

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Q:How to test the transformer capacity
Generally, the same method as the short-circuit impedance test is used to test the temperature rise. The secondary side of the transformer is short-circuited and the voltage is applied once, and the secondary current reaches the rated value. Wait until the transformer temperature changes less than 1 degree / hour later, and then maintain 3 hours, this time the transformer temperature rise is the final test value.  
Q:Why is the transformer coil insulation?
Because the transformer is used in different environments, according to different insulation level selection, can extend the life of the transformer. Transformer (Transformer) is the use of electromagnetic induction principle to change the AC voltage of the device, the main components are primary coil, secondary coil and core (core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage regulator (magnetic saturation transformer) and so on. According to the purpose can be divided into: power transformers and special transformers (electric furnace change, rectifier, frequency test transformer, voltage regulator, mine transformer, audio transformers, IF transformers, high-frequency transformers, impact transformers, instrument transformers, electronic transformers , Reactors, transformers, etc.). Circuit symbols commonly used as the beginning of the number. Example: T01, T201 and so on.
Q:2500KVA transformer bearing current how much calculation
Did not give the voltage data to transformer primary and secondary side rated voltage 10KV / 0.4KV as an example: Primary side rated current: I = P / 1.732 / U = 2500 / 1.732 / 10 ≈ 144 (A) Secondary side rated current: I = P / 1.732 / U = 2500 / 1.732 / 0.4 ≈ 3609 (A)
Q:New on the transformer reported to stop, how to do,
2. The time limit for reducing the capacity of electricity shall be determined according to the application made by the user, but the shortest period shall not be less than six months and the maximum period shall not exceed two years; 3. In the period of reduction, the power supply enterprises should retain the user to reduce the capacity of the right to use. Users require the resumption of electricity, no longer pay the power supply discount; more than the time limit required to restore electricity, the new equipment or capacity should be handled; 4. In the period of reduction within the requirements of the resumption of electricity, should be five days ago to the power supply business for the resumption of electricity procedures, the basic electricity from the date of unsealed; 5. After the expiration of the user and the new equipment, capacity users, two years may not bid to reduce or suspend. Such as the need to continue to handle the reduction or suspension of the reduction or suspension of part of the basic capacity of electricity should be calculated at 50 percent.
Q:How many transformers are used in a hundred households?
In accordance with the current design standards, high-end community, each household 30kW; mid-range community, each household 15kW; ordinary community, each household 6kW.
Q:315KVA transformer high-voltage side need to use the specifications of the high-voltage cable
You are not very specific, according to the general distribution transformer, then the high side of 10kV, low voltage side of the 400V; high voltage side of the actual current is small, the voltage is high, so the main choice of cable attention to insulation, pressure and other properties, specifications suggest that you choose YJV-1 * 25 (10KV) cable, 25 mm square cable. (High-voltage cable diameter is not too small)
Q:Three-phase three-winding transformer high-pressure medium-pressure low pressure is what it means
Hello! Transformer high voltage, medium pressure, low voltage, respectively, refers to the three groups of winding (rated) voltage level. For example: 220kV voltage level of the transformer: the 220kV high voltage side, 110kV pressure side, 10kV low voltage side of the three groups of voltage levels of the composition. Depending on the needs of the manufacturer, manufacturers may also be required to produce windings for other voltage classes. Such as: by the 220kV high voltage side, 35kV in the pressure side, 10kV low voltage side of the three groups of voltage levels of the composition. 500kV voltage level of the transformer: generally by the 500kV high voltage side, 220kV medium voltage side, 35kV low voltage side of the three groups of the composition of the voltage level winding.
Q:Transformer three-phase imbalance which harm
1, when the line is not full-phase operation, the zero sequence current is equivalent to the load current, then the line with its adjacent line zero sequence current may be large, even greater than the zero sequence backup protection settings, if not quickly cut Non-full-phase operation of the line, it may lead to adjacent line malfunction, leap-off; 2, for 220kV and above generator transformer group and machine-side circuit breaker, due to non-full phase operation during a larger negative sequence current, the generator, the transformer may cause a greater damage to the equipment.
Q:50KVA transformer maximum load is how much?
50KVA transformer can bring the maximum load is, 1.45 * 50 = 72.5A or so
Q:What are the specifications of the transformer capacity?
The optimum load rate of the transformer (ie, the load rate at the highest efficiency) is not in the rated state, but between 40% and 70%. The load factor is too high and the loss increases obviously. On the other hand, Margin is small, a slight increase in load, you need to replace the large capacity box change, frequent capacity is bound to increase investment, affecting power supply.

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