2000kVA/2500kVA/3150kVA 35kV Input 10kV/400V Step Up 11kV Output 3 Phase Oil Immersed Transformer
1. Product Description
This series of 3 phase oil immersed transformer covers three mainstream rated capacities of 2000kVA, 2500kVA and 3150kVA, featuring a professional step-up voltage conversion design with 35kV high voltage input, 10kV/400V low voltage input and stable 11kV output. Developed strictly in accordance with IEC and international power industry standards, this high-efficiency step-up oil immersed transformer adopts mature oil-immersed cooling and insulation technology, with ONAN/ONAF dual cooling modes optional, realizing efficient voltage conversion and stable power transmission in medium and high voltage power systems.
As a core medium-large capacity power transformation equipment, the 35kV input 11kV output step-up transformer is equipped with high-quality silicon steel core and pure copper winding structure, effectively reducing no-load loss and load loss during operation. The whole machine adopts fully sealed oil immersion structure, which isolates internal components from external humid air, dust and corrosive substances. It supports 50Hz/60Hz universal power frequency operation, adapts to global power grid standards, and solves the voltage matching problem between low-voltage power generation terminals and medium-voltage power transmission grids perfectly. Whether it is 400V low-voltage power collection or 10kV medium-voltage power supplementary transmission, it can stably boost voltage to standard 11kV grid-connected voltage, meeting the grid access requirements of various power generation and power supply scenarios.
2. Core Product Uses
The core function of the 2000kVA/2500kVA/3150kVA 3 phase oil immersed step-up transformer is to complete safe, efficient and stable voltage step-up conversion and power distribution transmission in industrial power systems and power grid engineering. Its core application value lies in solving the voltage mismatch between decentralized power generation equipment and municipal medium-voltage power grids, as well as the long-distance power transmission loss problem of low-voltage electricity.
In power generation links, this 10kV 400v step up 11kv transformer can boost the low-voltage electric energy generated by distributed power stations to 11kV standard grid-connected voltage, realizing seamless grid connection of power generation equipment. In power transmission and distribution links, it converts 35kV high-voltage power or 10kV/400V conventional power to 11kV stable output, providing matched voltage power supply for medium-voltage power consumption equipment in industrial parks, mining areas and large infrastructure projects. Meanwhile, it undertakes the tasks of power voltage stabilization, load balancing and power loss reduction in regional power supply systems, effectively improving the overall power supply efficiency and operation stability of the power system, and reducing the operation cost of long-term power transmission and distribution.
3. Main Application Scenarios
This medium-large capacity oil immersed step-up transformer is widely applicable to various scenarios requiring medium and high voltage power conversion, grid-connected power generation and industrial stable power supply, with strong environmental adaptability and load-bearing capacity.
3.1 New Energy Power Generation Industry
It is the core supporting equipment for photovoltaic power stations, wind power plants and biomass power generation projects. Most new energy power generation equipment outputs 400V low voltage or 10kV medium voltage power, which cannot be directly connected to 11kV municipal power grids. The 3150kVA/2500kVA/2000kVA 35kV input step-up transformer can stably boost the generated power to 11kV standard voltage, realizing large-scale grid-connected power transmission of new energy power stations, and is suitable for centralized power collection and voltage upgrading of medium and large new energy power bases.
3.2 Industrial Park & Factory Power Supply
Large manufacturing factories, chemical industrial parks, metallurgy plants and mining enterprises have high power consumption and strict requirements on power supply stability. The 10kV 400V step up 11kV oil immersed transformer can match the self-provided power generation equipment of industrial enterprises, boost self-generated low-voltage power to medium voltage for factory internal power transmission, and can also connect 35kV municipal high voltage power to convert to 11kV stable power supply for high-power industrial equipment, avoiding power supply fluctuation and voltage drop caused by long-distance low-voltage power transmission.
3.3 Municipal Power Grid & Infrastructure Engineering
It is applicable to urban and rural power grid renovation, regional power distribution station construction, highway, railway and airport infrastructure power supply projects. As an important part of the medium-voltage power distribution system, the 3 phase 11kV output oil immersed transformer can adjust regional power grid voltage balance, optimize power distribution structure, and provide continuous and stable 11kV power guarantee for large-scale public infrastructure, effectively improving the coverage and reliability of municipal power supply.
3.4 Remote Area Power Supply Projects
For remote mountainous areas, pastoral areas and island power supply scenarios with insufficient municipal power grid coverage, supporting diesel generator sets and distributed power supply systems. The high-efficiency 35kV input 11kV step-up transformer converts low-voltage power generated by mobile power supply equipment into medium voltage power, realizing long-distance low-loss power transmission, solving the power supply difficulty of remote areas, and adapting to outdoor harsh environment operation conditions.
4. Product Core Features
4.1 Efficient Energy-Saving & Low Loss Performance
This series of 2000kVA, 2500kVA, 3150kVA oil immersed power transformers adopts high-grade oriented silicon steel sheet core with 45° fully inclined joint step laminated structure, which minimizes magnetic leakage and no-load loss. The pure copper low-resistance winding effectively reduces load loss during high-load operation. Compared with traditional ordinary transformers, the no-load loss is reduced by more than 35%, and the overall operation energy consumption is low, which can save a lot of power operation costs for users in long-term industrial operation. The stable voltage conversion performance ensures that the 11kV output voltage error is controlled within the international standard range, without frequent voltage fluctuation.
4.2 Superb Structural Durability & Environmental Adaptability
The whole machine adopts fully sealed oil immersion anti-corrosion structure, with high-strength steel shell and anti-rust and anti-corrosion coating treatment, which can resist outdoor wind, rain, dust and corrosive gas erosion. The internal insulating oil adopts high-quality mineral insulating oil, with excellent heat dissipation and insulation performance, supporting long-term stable operation in the temperature range of -25℃ to 40℃ and altitude below 1000m. The product has strong short-circuit resistance and overload capacity, can resist instantaneous power impact and short-circuit faults in the power grid, and has a service life of more than 30 years, meeting the long-term uninterrupted operation needs of industrial power systems.
4.3 Safe & Stable Operation with Complete Protection
Equipped with professional Buchholz relay, pressure relief valve, oil level gauge and temperature monitoring device, this 3 phase step-up transformer realizes real-time monitoring of internal oil temperature, oil level and operating state. It has multiple protection functions such as overvoltage protection, overcurrent protection, short-circuit protection and overload protection, which can automatically alarm and cut off the power supply in case of abnormal operating conditions, avoiding equipment damage and power grid safety accidents. The fully sealed structure effectively prevents insulating oil deterioration and moisture ingress, reduces equipment failure rate, and improves the overall operation safety and stability of the power system.
4.4 Flexible Specification & Low Maintenance Cost
The product covers three conventional high-power specifications of 2000kVA, 2500kVA and 3150kVA, supporting 35kV high voltage input, 10kV/400V dual low voltage input and 11kV fixed step-up output, with flexible voltage matching and wide applicability. It supports ONAN natural oil cooling and ONAF forced air cooling dual modes, which can adapt to different load operation conditions. The fully sealed design avoids frequent oil replacement and internal cleaning, with simple daily maintenance, low later operation and maintenance cost, and high cost performance, which is very suitable for large-scale industrial and power grid long-term deployment.
5. Frequently Asked Questions (FAQ)
Q1: What is the difference between 2000kVA, 2500kVA and 3150kVA models and how to choose the right capacity?
The three models are different in rated load capacity, maximum transmission power and applicable load scenarios. The 2000kVA oil immersed step-up transformer is suitable for small and medium-sized new energy power stations, single industrial factory power supply and regional small-scale power distribution projects with low total power load. The 2500kVA model is the mainstream middle-capacity model, which can meet the power supply needs of most medium-sized industrial parks and conventional distributed power generation projects, with balanced load capacity and cost performance. The 3150kVA high-capacity transformer is suitable for large new energy bases, large mining enterprises and industrial parks with high power consumption and long-term high-load operation. Users can select the corresponding model according to the actual total power load, peak power consumption and future power expansion demand of the project, and it is recommended to reserve 10%-20% load margin to avoid long-term overload operation.
Q2: Can this 35kV input 11kV output step-up transformer adapt to outdoor all-weather operation?
Yes, this series of 3 phase oil immersed transformers is specially designed for outdoor industrial and power grid scenarios, with excellent all-weather operation adaptability. The whole machine adopts fully sealed waterproof, dustproof and anti-corrosion structure, the shell is treated with high-temperature anti-rust coating, and the internal insulating system is isolated from the external environment, which can effectively resist rainwater erosion, dust accumulation, ultraviolet aging and corrosive gas interference. It can work stably in the ambient temperature range of -25℃ to 40℃ and relative humidity ≤90%, and is suitable for unsheltered outdoor installation and operation in power stations, industrial parks, mining areas and municipal power distribution stations. Only regular oil quality inspection and equipment state inspection are needed in daily use to ensure long-term stable outdoor operation.
Q3: What are the key maintenance items for long-term operation of 10kV 400V step up 11kv transformer?
This oil immersed step-up transformer has low daily maintenance difficulty, and the core maintenance items are concentrated in regular state inspection and parameter calibration. First, regularly check the insulating oil quality, oil level and oil temperature, replace deteriorated insulating oil in time to ensure heat dissipation and insulation performance. Second, regularly detect the output voltage stability of 11kV terminal and the operation state of 35kV input terminal to ensure no voltage deviation and line aging. Third, check the sensitivity of protection devices such as Buchholz relay and pressure relief valve to ensure that the protection function is normal. Fourth, clean the surface dust and sundries of the equipment regularly to avoid heat dissipation blockage. Under normal operating conditions, comprehensive maintenance once a quarter and full performance detection once a year can effectively extend the service life of the equipment and avoid operating faults.
