12500KVA & 20000KVA Pure Copper Three Phase Oil Immersed Electric Transformer
12500KVA & 20000KVA Pure Copper Three Phase Oil Immersed Electric Transformer | 35KV/10KV/10.5KV Input, 380V Output
1. Product Description
This high-capacity series features 12500KVA and 20000KVA three phase oil immersed electric transformers built with 100% pure copper windings, designed for medium and high-voltage power conversion in industrial and utility grid systems. Supporting multi-grade input voltages including 35KV, 10KV and 10.5KV, this heavy-duty oil filled power transformer efficiently steps down high and medium grid voltage to standard 380V three-phase low-voltage power, perfectly matching large-scale power distribution and heavy industrial power supply demands. As a high-performance medium voltage transformer, it fills the market gap of high-load, high-stability power transformation equipment for hub substations and large industrial bases.
Manufactured fully compliant with IEC 60076 international power equipment standards and national grid technical specifications, this pure copper oil immersed transformer adopts premium low-loss silicon steel core and full pure copper winding structure, completely different from aluminum winding conventional transformers in conductivity, heat resistance and service stability. The whole machine adopts mature oil-natural air-natural (ONAN) cooling mode and fully sealed corrugated oil tank structure, which effectively solves heat accumulation and insulation aging problems during long-term full-load and overload operation. The dual-capacity configuration of 12500KVA and 20000KVA allows flexible selection according to project load scale, adapting to both medium-scale regional power grid distribution and ultra-large industrial continuous power supply scenarios.
Engineered for long-term unattended outdoor operation, this 35KV/10KV/10.5KV input electric transformer delivers stable 380V terminal output with ultra-low power loss and strong anti-interference capability. Its multi-voltage input design enables compatibility with mainstream domestic medium-voltage grid standards, solving the voltage matching problem of different regional power grid access, and serving as a core upgrading device for traditional low-efficiency iron-core transformers in modern power system construction and renovation projects.
2. Core Product Purposes
The core purpose of 12500KVA and 20000KVA pure copper three phase oil immersed transformers is to realize safe, efficient and low-loss hierarchical voltage conversion and bulk electric energy distribution in 10KV, 10.5KV and 35KV medium-voltage power systems, providing stable and compliant 380V industrial power for terminal heavy-load equipment and large power consumption units.
Primarily, this high-capacity oil immersed power transformer undertakes key step-down tasks for multi-level medium voltage grids. It can convert 35KV high medium voltage for regional transmission grids, as well as conventional 10KV and 10.5KV distribution grid voltage into standard 380V three-phase industrial power, meeting the high-power operation demand of large mechanical equipment, production lines and centralized power distribution systems. The pure copper winding structure ensures ultra-high power transmission efficiency, effectively reducing electric energy loss during voltage conversion and solving the problem of serious power consumption waste of traditional transformers under long-term high-load operation.
In addition, this industrial-grade electric transformer plays a vital role in grid load balancing and operation safety protection. It can buffer instantaneous voltage surges and current impacts caused by grid load peaks and equipment startup, suppress power grid harmonic interference and voltage fluctuation, and stabilize terminal 380V output quality. With excellent short-circuit resistance and overload tolerance, it can isolate circuit fault risks, protect subsequent power distribution equipment and industrial electrical facilities, and ensure continuous and safe power supply for power grid hubs and large industrial production bases. It also optimizes regional power grid operation efficiency and reduces long-term grid operation costs.
3. Typical Application Scenarios
3.1 Regional 35KV/10KV Medium-Voltage Grid Hub Substations
This 12500KVA and 20000KVA pure copper oil immersed transformer is the core power transformation equipment for urban and regional medium-voltage grid substations. Most municipal backbone power grids adopt 35KV long-distance transmission and 10KV/10.5KV regional distribution modes, and this high-capacity transformer can efficiently convert high and medium voltage grid power into 380V low-voltage power for urban industrial zones, commercial clusters and public infrastructure. The 12500KVA model is suitable for medium-scale regional power distribution hubs, while the 20000KVA ultra-large capacity model is dedicated for central urban hub substations with ultra-high power load, effectively improving urban power grid supply capacity and operation stability.
3.2 Large Heavy Industrial Production Bases
It is widely applied in metallurgy, chemical industry, coal mining, building materials manufacturing and other heavy industrial scenarios with high power consumption demand. Large industrial bases are mostly connected to 35KV dedicated industrial power grids, and their production lines, large fans, water pumps and mechanical equipment all rely on stable 380V three-phase high-power power supply. The full pure copper winding design adapts to 24-hour uninterrupted full-load operation of industrial production, and the two capacity specifications can flexibly match medium and ultra-large industrial park load demands, completely solving the problems of insufficient power supply and unstable voltage of ordinary transformers in heavy industrial working conditions.
3.3 New Energy Power Generation & Energy Storage Projects
This high-efficiency oil immersed electric transformer serves as key supporting equipment for large-scale photovoltaic power stations, wind power plants and grid-side energy storage power stations. New energy power generation projects are mainly connected to 10KV, 10.5KV and 35KV medium-voltage power grids, and require stable voltage conversion to support on-site equipment operation and grid-connected power transmission. The equipment can stabilize fluctuating new energy power output, convert irregular medium voltage into standard 380V industrial power for on-site operation and maintenance equipment, and improve the safety and stability of new energy grid connection systems.
3.4 Large Infrastructure & Key National Projects
It is also applicable to large railway transit hubs, airport supporting facilities, urban comprehensive business districts and national key engineering projects. These scenarios have the characteristics of large power load, high power supply stability requirements and long continuous power consumption time. The pure copper oil immersed transformer has strong load resistance and anti-interference ability, can adapt to complex power grid environment and long-term high-load operation, and provides reliable 380V power guarantee for large public infrastructure and key engineering construction and operation.
4. Core Product Features
4.1 100% Pure Copper Winding & Ultra-High Conductivity
Different from conventional aluminum winding transformers, this three phase oil immersed electric transformer adopts full pure copper winding structure with higher conductivity, lower resistance and better thermal stability. Pure copper material effectively reduces coil heat generation and power loss during high-current operation, ensuring more efficient electric energy conversion. It avoids the problems of easy aging, high failure rate and short service life of aluminum winders under long-term high-load operation, and greatly improves the overall stability and durability of the equipment in high-power power transformation scenarios.
4.2 Multi-Voltage Input & Wide Application Versatility
Supporting three mainstream input voltage grades of 35KV, 10KV and 10.5KV, the transformer can perfectly adapt to different medium-voltage grid access standards nationwide, covering industrial dedicated high-voltage grids and conventional urban and rural distribution grids. It stably outputs standard 380V three-phase low voltage, meeting the unified power demand of most industrial equipment and terminal power distribution systems. The dual-capacity design of 12500KVA and 20000KVA realizes flexible matching of medium and ultra-large load projects, with extremely high market versatility and project adaptability.
4.3 Low Power Loss & High Energy-Saving Efficiency
Optimized with high-grade low-loss silicon steel core and precision winding layout, this high-capacity oil immersed power transformer effectively reduces no-load loss, load loss and magnetizing current. Compared with traditional old-fashioned transformers, the energy-saving effect is significantly improved, and the power conversion efficiency remains above 98% under long-term full-load operation. The pure copper winding further reduces operating power consumption, effectively lowering the long-term operation and power consumption costs of power grids and industrial enterprises, with outstanding energy-saving and economic benefits.
4.4 Excellent Heat Dissipation & Continuous Operation Stability
Adopting standard ONAN oil natural air natural cooling system and fully sealed circulating oil tank structure, the internal insulating oil can efficiently and evenly take away the heat generated by coil operation. The corrugated heat dissipation structure increases heat dissipation area, avoiding local overheating of equipment under long-term high-load and continuous operation. The sealed oil tank prevents insulating oil from moisture, oxidation and leakage, maintains stable insulation and heat dissipation performance for a long time, and ensures 24-hour uninterrupted safe operation of the transformer in heavy industrial and grid hub scenarios.
4.5 Strong Environmental Adaptability & High Safety Performance
The whole machine adopts high-strength steel plate shell and weather-resistant anti-corrosion coating, which can adapt to outdoor open-air substations, dusty industrial sites, humid and high-temperature environments. It has excellent seismic resistance, dust resistance and rain erosion resistance, with low partial discharge rate and strong short-circuit impact resistance. Equipped with standard pressure relief valve, oil level monitoring device and temperature sensing protection system, it can automatically release internal overpressure and monitor operating status in real time, effectively avoiding equipment burnout and safety accidents caused by overheating and overpressure.
4.6 Low Maintenance & Long Service Life
With mature and reliable internal structure and high-quality pure copper core components, this oil immersed electric transformer has extremely low daily failure rate and long service life. The fully sealed design avoids frequent oil replacement and internal cleaning, and daily maintenance only requires regular oil quality inspection, oil level calibration and sealing performance check. It supports long-term unattended outdoor operation, greatly saving later operation and maintenance manpower and material costs, with superior comprehensive cost performance compared with traditional high-capacity transformers.
5. Frequently Asked Questions (FAQ)
Q1: What is the difference between 12500KVA and 20000KVA pure copper oil immersed transformers in practical application?
The two models adopt consistent pure copper winding, structural technology and safety standards, with the only core difference in rated load capacity and applicable scenarios. The 12500KVA transformer is suitable for medium-scale regional grid substations, medium-sized industrial parks and conventional new energy power stations with stable and medium-level power load, featuring moderate energy consumption and high cost performance. The 20000KVA ultra-high capacity model is designed for ultra-large heavy industrial bases, central urban hub substations and large-scale energy storage power stations with high peak power consumption and long-term full-load operation demand. Users can select models according to actual maximum load and future power expansion reserve of the project.
Q2: How to choose the input voltage of 35KV, 10KV and 10.5KV for this transformer series?
The input voltage selection must be strictly matched with the local grid access standard. The 10KV input model is applicable to most conventional urban and rural medium-voltage distribution grids, which is the most widely used specification for general industrial and municipal power supply. The 10.5KV model is aimed at regional power grids with slightly higher rated voltage and industrial dedicated distribution systems, which can effectively avoid output voltage drop caused by long-distance power transmission. The 35KV input model is specially used for high-medium voltage transmission grids and large industrial dedicated power supply lines, suitable for long-distance bulk power transmission and high-load hub power transformation scenarios.
Q3: What are the advantages of pure copper winding oil immersed transformers compared with aluminum winding transformers?
Pure copper winding has far better electrical conductivity, thermal stability and mechanical durability than aluminum winding. Copper windings generate less heat and lower power loss during high-current operation, ensuring higher power conversion efficiency and saving long-term power consumption costs. In terms of durability, pure copper coils are not easy to oxidize and deform under long-term high-load and temperature-changing working conditions, with lower failure rate and longer service life. Aluminum winding transformers are prone to overheating, aging and voltage instability under heavy load, which cannot meet the long-term continuous operation requirements of large power grids and heavy industrial projects, making pure copper models more suitable for high-standard high-capacity power transformation scenarios.
