3 Phase 2.5mVA Power Distribution Transformer 20 / 0.4kv 2500kVA Oil Immersed Transformer
1. Product Description
The 3 Phase 2.5mVA Power Distribution Transformer 20 / 0.4kv 2500kVA Oil Immersed Transformer is a high-capacity medium-voltage step-down power distribution equipment widely used in utility grid systems and large-scale industrial power supply projects. Rated at 2500kVA (2.5MVA) capacity and designed with a standard 20kV to 0.4kV voltage ratio, this three-phase oil immersed transformer serves as the core power conversion unit for medium-to-low voltage power distribution, perfectly matching 50Hz industrial and municipal AC power systems. Manufactured in strict accordance with IEC and international power equipment standards, this oil cooled distribution transformer adopts mature industrial-grade design and optimized electromagnetic structure, ensuring stable full-load operation for long-duration engineering scenarios.
Built with high-quality low-loss grain-oriented silicon steel core and high-purity copper winding coils, this 20kV/0.4kV oil immersed power transformer effectively minimizes no-load loss, load loss and magnetic flux leakage during continuous operation. The whole machine adopts a fully sealed corrugated oil tank structure and high-vacuum oil injection and drying technology, completely eliminating internal moisture and residual air to prevent insulating oil aging and insulation performance degradation. Different from small and medium-capacity distribution transformers, this 2.5MVA high-power transformer features reinforced internal coil fixing and anti-short-circuit structural design, greatly improving mechanical stability and impact resistance. With professional off-circuit tap adjustment function, it can adapt to slight grid voltage fluctuations, maintaining stable 0.4kV low-voltage output for downstream high-power electrical equipment.
2. Core Purpose
The core purpose of this 2500kVA 3 Phase Oil Immersed Power Distribution Transformer is high-capacity medium voltage step-down conversion and regional centralized power distribution stabilization. It mainly undertakes the task of converting 20kV medium-voltage grid electric energy into standard 400V low-voltage industrial and civil power, solving the voltage matching and large-load power supply problems of modern industrial parks and urban central power distribution systems. As a key hub device in medium-voltage power grids, it effectively balances three-phase load current, reduces power transmission line loss, and suppresses terminal voltage fluctuation caused by high-power equipment startup and peak power consumption.
This 2.5mVA high-capacity distribution transformer is specially customized for large-load centralized power supply scenarios, making up for the insufficient load capacity of conventional small and medium-sized transformers. In municipal power grid construction, it is used for regional substation power distribution and grid voltage stabilization to ensure stable power supply for large residential communities and commercial clusters. In industrial production scenarios, it provides continuous and stable high-power power support for heavy-duty mechanical equipment and automated production lines. In addition, the oil immersed power distribution transformer can optimize power supply quality, improve grid operation efficiency, and reduce equipment failure rates caused by unstable voltage, realizing safe, energy-saving and efficient power grid operation.
3. Application Scenarios
With its 2500kVA ultra-large load capacity, stable 20kV to 0.4kV voltage conversion performance and excellent outdoor environmental adaptability, this three-phase oil immersed power distribution transformer covers utility grid upgrading, large industrial production, commercial complex power supply and new energy supporting power distribution fields, becoming the preferred equipment for high-load medium-voltage power distribution projects.
3.1 Urban & Rural Utility Grid Construction
This 20/0.4kV oil immersed distribution transformer is widely applied in urban central substations, suburban power grid expansion and rural high-load grid renovation projects. For urban large-scale residential communities, comprehensive commercial zones and township central power supply areas with dense power consumption and large total load, the 2.5MVA high-capacity transformer can fully meet centralized peak power demand and long-term stable power distribution requirements. It effectively solves the problems of insufficient power supply capacity and voltage drop in traditional old grids, improving the overall power supply reliability of regional municipal power systems.
3.2 Large Industrial Park & Heavy Industry Power Supply
Industrial manufacturing parks, chemical plants, metallurgical enterprises, mining bases and large processing factories are the core application scenarios of this 2500kVA three-phase power distribution transformer. These enterprises are equipped with a large number of high-power motors, automated production lines and mechanical operation equipment, requiring long-term high-load power support. The 2.5mVA high-capacity oil immersed transformer can bear continuous full-load operation and instantaneous current impact, adapting to the high-intensity power consumption environment of heavy industry, and ensuring uninterrupted operation of industrial production equipment.
3.3 Commercial & Municipal Infrastructure Projects
Large urban commercial plazas, comprehensive office buildings, hospital clusters, campus functional areas and transportation hub infrastructure have centralized and large power consumption demand. This high-capacity oil cooled transformer provides stable 400V low-voltage power for central air conditioning systems, large electromechanical equipment, fire control power systems and daily office power consumption. Its stable output performance and high safety factor can fully meet the long-term uninterrupted power supply requirements of public municipal and commercial infrastructure.
3.4 New Energy Power Generation & Grid Connection Projects
Centralized photovoltaic power stations, wind power generation bases and energy storage power supply projects require high-capacity power distribution and grid connection equipment. This 20kV/0.4kV three-phase oil immersed transformer can complete voltage conversion and centralized power distribution for new energy power generation, stably integrate green power into municipal power grids, and solve the problem of unstable power output of new energy equipment. Its strong overload resistance and anti-interference ability adapt to the complex working conditions of new energy power generation sites.
4. Product Features
This 3 Phase 2.5mVA 2500kVA 20/0.4kv Oil Immersed Power Distribution Transformer adopts optimized electromagnetic design and upgraded industrial manufacturing technology, with prominent advantages of low loss, high stability, strong short-circuit resistance and long service life, fully meeting the high-standard operation requirements of large-load power distribution projects.
4.1 Ultra-Low Energy Loss & High Power Efficiency
Equipped with high-performance low-loss silicon steel core and high-conductivity pure copper windings, this high-capacity power distribution transformer greatly reduces no-load loss and load loss during operation. The optimized magnetic circuit structure avoids magnetic flux saturation and harmonic interference, and the overall power conversion efficiency exceeds 99%, far exceeding the industry standard. Long-term full-load operation effectively reduces grid line loss and operational energy consumption, bringing significant energy-saving and cost-reducing benefits for municipal power grids and large industrial enterprises.
4.2 Excellent Short-Circuit Resistance & Structural Stability
Different from ordinary distribution transformers, this 2500kVA oil immersed transformer adopts reinforced coil fixing structure and anti-deformation welding technology. The internal components are firmly fixed to avoid displacement and deformation caused by short-circuit current impact and long-term vibration. It has strong short-circuit resistance and overload tolerance, can withstand instantaneous large current impact of high-power equipment startup, and maintains stable structural and electrical performance in long-term high-load operation, with extremely low failure rate.
4.3 Reliable Oil Cooling System & Long Service Life
Adopting standard ONAN natural oil circulation and air cooling mode, matched with high-efficiency corrugated heat dissipation structure, the equipment realizes uniform and rapid heat dissipation without auxiliary cooling equipment. The fully sealed vacuum oil injection process isolates internal insulating oil from external air and moisture, effectively delaying oil aging and insulation degradation. Under rated working conditions, the design service life of the transformer can reach more than 40 years, which is far higher than ordinary power distribution equipment, reducing long-term equipment replacement costs.
4.4 Strong Environmental Adaptability & High Safety
The transformer shell adopts multi-layer anti-corrosion, rust-proof and weather-resistant spraying technology, which can resist outdoor high temperature, rain erosion, dust pollution and coastal salt spray corrosion. It can operate stably in complex outdoor environments and support long-term unattended operation. Equipped with complete overvoltage, overcurrent, short-circuit and overload protection devices, it can automatically cut off power supply in case of grid faults, effectively protecting the transformer body and downstream high-power electrical equipment, with high operational safety and stability.
4.5 Standardized Manufacturing & Low Maintenance Cost
Manufactured in strict accordance with international IEC standards, this 2.5mVA power distribution transformer has standardized parameters and stable quality, supporting outdoor platform-mounted and substation centralized installation. The fully sealed structure avoids frequent oil leakage and oil quality problems, and daily maintenance is simple and convenient, only requiring regular oil level inspection, oil quality testing and radiator dust cleaning. It has low later operation and maintenance costs and high comprehensive cost performance in large-scale power distribution projects.
5. FAQ
5.1 What kind of scenarios is the 2500kVA (2.5mVA) 20/0.4kV oil immersed transformer suitable for?
This high-capacity three-phase oil immersed distribution transformer is exclusively designed for large-load centralized power supply scenarios, not suitable for small scattered low-load power distribution. It is mainly used for urban regional hub substations, large industrial parks, heavy manufacturing enterprises, commercial complex clusters and new energy power station supporting power distribution. Its 2500kVA rated capacity can fully meet the long-term high-load operation demand of high-power equipment and regional centralized power consumption, and is the core equipment for medium and large-scale power grid upgrading and industrial power supply renovation projects.
5.2 What are the key advantages of oil immersed structure compared with dry-type transformers for 2.5mVA high-capacity models?
For 2500kVA high-capacity power distribution scenarios, oil immersed transformers have more obvious practical advantages. The natural oil circulation cooling system provides better heat dissipation effect, which can adapt to long-term continuous full-load operation and has stronger overload resistance than dry-type transformers. The fully sealed oil tank structure has better weather resistance and environmental adaptability, supporting outdoor unattended installation, while dry-type transformers are mostly limited to indoor environments. In addition, high-capacity oil immersed power distribution transformers have lower manufacturing cost, longer service life and more stable long-term operation performance, which is more suitable for large-scale industrial and municipal power grid projects.
5.3 What daily maintenance work is required for the 20/0.4kV 2500kVA oil immersed power transformer?
Daily maintenance of this high-capacity oil immersed transformer focuses on safety inspection and heat dissipation guarantee. First, regularly check the insulating oil level and oil quality, replace deteriorated insulating oil in time to ensure normal insulation and heat dissipation performance. Second, clean the radiator surface dust and sundries regularly to avoid heat dissipation blockage and equipment overheating. Third, inspect the sealing parts for oil leakage and test three-phase voltage and current balance to ensure stable operating parameters. For outdoor installed equipment, strengthen anti-corrosion and rainproof inspection in harsh environments to eliminate potential safety hazards and ensure long-term stable full-load operation of the equipment.
