11kv 33kv Oil Immersed Transformer 1600 Kva 200kva 250kva 500kva Three Phase Power Transformer
1. Product Overview
This professional 11kV/33kV oil immersed transformer series covers mainstream rated capacities including 200kVA, 250kVA, 500kVA and 1600kVA, belonging to high-performance three phase power transformer widely applied in urban and rural power distribution systems. Designed and manufactured in strict accordance with IEC and IEEE international standards, the oil immersed distribution transformer adopts high-purity insulating oil as the cooling and dielectric medium, paired with a high-quality silicon steel sheet core and copper winding structure, realizing efficient voltage conversion and stable power transmission. Different from dry-type transformers, this oil-filled power transformer features excellent heat dissipation performance and strong environmental adaptability, supporting long-term continuous operation under full-load and peak-load conditions. It is a core grid power equipment that balances energy saving, durability and cost-effectiveness, suitable for medium-voltage power grid step-down and step-up scenarios across multiple industries.
2. Core Product Features
2.1 Excellent Energy-Saving and Low-Loss Performance
The three phase oil immersed power transformer adopts a symmetrical three-dimensional core structure, which effectively reduces magnetic resistance, excitation current and no-load loss. The optimized winding layout minimizes load loss during power transmission, making the 200kVA, 250kVA small and medium-capacity models and 500kVA, 1600kVA large-capacity models all achieve ultra-low energy consumption operation. Compared with traditional old-fashioned transformers, this series of medium voltage oil immersed transformers can greatly reduce long-term operating power consumption, meeting global energy conservation and emission reduction standards for power equipment.
2.2 Superior Heat Dissipation and Stable Operation
Equipped with ONAN natural oil circulation cooling system, the 11kV/33kV oil immersed transformer relies on high-flow insulating oil to quickly transfer internal operating heat to the corrugated tank shell for natural heat dissipation. This passive cooling structure is stable and reliable, without additional fan and cooling equipment, avoiding mechanical failure risks. It can effectively cope with high-temperature working environments and frequent load fluctuations, ensuring continuous and stable voltage output of the three phase power transformer, and greatly extending the service life of the equipment.
2.3 High Safety and Sealing Performance
The fully sealed oil tank structure eliminates the hidden danger of insulating oil leakage and oxidation, preventing moisture and dust from entering the transformer interior. The whole machine reaches IP54 protection level, with strong anti-pollution, rainproof and dustproof capabilities. The internal insulating oil maintains stable dielectric strength for a long time, effectively avoiding short circuit, breakdown and other electrical faults. Whether it is the compact 200kVA, 250kVA distribution transformer or the high-power 500kVA, 1600kVA industrial power transformer, it can maintain safe operation in harsh outdoor and industrial environments.
2.4 Wide Adaptability and Customization Flexibility
This medium voltage oil immersed transformer supports 11kV and 33kV high-voltage input, matching conventional 0.4kV low-voltage output, and can adjust voltage ratio and capacity configuration according to user grid requirements. The product covers multiple capacity specifications from small 200kVA to large 1600kVA, perfectly adapting to power demand differences of residential communities, commercial parks, industrial factories and municipal power grids. The compact overall structure and lightweight design simplify installation and commissioning, greatly reducing on-site construction difficulty and later maintenance costs.
2.5 Long Service Life and Low Maintenance Cost
Adopting high-strength anti-corrosion steel plate shell and high-temperature resistant insulating materials, the three phase oil immersed power transformer has strong weather resistance, resisting aging and damage caused by wind, rain, frost and high temperature. The fully sealed design avoids frequent oil replacement and internal cleaning work, and the daily maintenance is extremely simple. The overall mechanical service life can reach 25-30 years, which is far higher than ordinary power distribution transformers, bringing long-term stable economic benefits for users.
3. Core Product Purposes
As key medium-voltage power transmission and transformation equipment, the 11kV/33kV three phase oil immersed transformer mainly undertakes the core functions of voltage conversion, power distribution and grid voltage stabilization in power systems. Its core purpose is to convert 11kV or 33kV medium-high voltage industrial grid electricity into 0.4kV low-voltage commercial and residential electricity, and can also realize reverse step-up power transmission according to grid operation needs. The 200kVA and 250kVA small-capacity models are mainly used for fine power distribution of terminal loads, while the 500kVA and 1600kVA large-capacity models are responsible for centralized power supply and regional grid power regulation. This oil immersed distribution transformer effectively balances grid load pressure, improves power transmission efficiency, and ensures safe, stable and continuous power supply for various electrical equipment, which is an indispensable core equipment for regional power grid construction and industrial power support.
4. Main Application Scenarios
4.1 Urban and Rural Power Distribution Grid
The 11kV/33kV oil immersed power transformer is widely used in urban municipal substations, rural power grid renovation and community power distribution stations. The 200kVA and 250kVA compact models are suitable for residential quarters, street commercial outlets and small community power supply, while the 500kVA and 1600kVA high-power models are applied in regional central power distribution stations to undertake centralized power distribution tasks for multiple communities, effectively solving the problem of uneven power supply in urban and rural grids.
4.2 Industrial Manufacturing Enterprises
In heavy industry, light industry, chemical industry, mining and other industrial scenarios, the three phase oil immersed transformer provides stable medium-low voltage power support for production equipment. Industrial production has large power load and frequent load changes, and the 500kVA and 1600kVA high-capacity oil immersed transformers can adapt to long-term high-load operation of industrial production lines, mechanical equipment and automated production systems, ensuring continuous power supply for industrial production and avoiding production shutdown losses caused by voltage instability.
4.3 Commercial and Public Infrastructure
This series of medium voltage oil immersed transformers is applicable to shopping malls, office buildings, schools, hospitals, stadiums and other public buildings and commercial parks. The 200kVA and 250kVA models meet the daily power demand of small and medium-sized commercial facilities, while the 500kVA and 1600kVA models support large commercial complexes and public infrastructure with dense electrical equipment, providing safe and stable power guarantee for public service and commercial operation.
4.4 New Energy and Special Engineering Projects
It is also widely used in photovoltaic power stations, wind power stations, energy storage power stations and municipal engineering, road traffic engineering and remote area power supply projects. The oil-filled power transformer has strong environmental adaptability, can operate stably in outdoor open-air environments and remote harsh terrain, complete voltage conversion and grid-connected power transmission of new energy power generation systems, and help new energy power grid integration and off-grid power supply projects.
5. FAQ (Frequently Asked Questions)
5.1 What are the differences and applicable scenarios of 200kVA, 250kVA, 500kVA and 1600kVA oil immersed transformers?
The four capacity models cover full-scenario power distribution needs with clear application positioning. The 200kVA and 250kVA small-capacity three phase oil immersed transformers feature small size, low energy consumption and flexible installation, suitable for small residential communities, street shops, small factories and single public facilities with low power load. The 500kVA medium-capacity model is suitable for medium-sized industrial workshops, comprehensive office buildings and medium-sized commercial parks with moderate power consumption. The 1600kVA large-capacity oil immersed power transformer has strong load-bearing capacity, which is the preferred equipment for large industrial enterprises, regional substations, large commercial complexes and new energy power stations with high power demand and long-term high-load operation.
5.2 Is the 11kV/33kV oil immersed transformer suitable for outdoor long-term operation? What is its environmental adaptability?
This series of oil immersed distribution transformers is specially designed for indoor and outdoor dual-use operation, with excellent environmental adaptability. The fully sealed anti-corrosion shell and IP54 protection level enable the equipment to resist rain, snow, dust, high temperature and low temperature erosion, and can operate stably in the temperature range of -40℃ to +45℃ and altitude below 1000 meters. The ONAN natural cooling system can adapt to high-temperature outdoor working environments, and the sealed oil tank structure will not cause oil deterioration and leakage due to outdoor environmental changes. It can run continuously and stably all year round in outdoor power distribution stations, industrial zones, new energy power stations and other open-air scenarios without frequent maintenance.
5.3 What are the core advantages of oil immersed transformers compared with dry-type transformers in medium-voltage power distribution?
In 11kV and 33kV medium-voltage power distribution scenarios, three phase oil immersed power transformers have more prominent comprehensive advantages. First, the insulating oil cooling system has better heat dissipation effect, stronger overload resistance, and can adapt to long-term high-load and peak-load operation, which is more suitable for industrial and regional large-power supply scenarios. Second, the manufacturing cost and later maintenance cost of oil-filled transformers are lower than dry-type transformers, with higher cost performance for long-term use. Third, the equipment has longer service life and more stable electrical performance, with lower failure rate in harsh environments. Although dry-type transformers are more suitable for indoor fire-proof scenarios, oil immersed transformers are still the mainstream choice for outdoor power grids, industrial power supply and large-scale power distribution projects due to their superior stability and economy.
