6kV-15kV 50-3150kVA Three-Phase Oil Immersed Flyback Topology Distribution Transformer
1. Product Description
This 6kV 10kV 11kV 15kV 50-3150kVA three-phase distribution transformer adopts mature oil immersed flyback topology design, which is a medium-voltage power distribution equipment independently developed and optimized for industrial and civil power grid systems. Rated for 50Hz/60Hz AC power supply, the transformer covers a complete capacity range from 50kVA to 3150kVA and supports multiple medium voltage grades including 6kV, 10kV, 11kV and 15kV, perfectly matching the voltage standards of regional power distribution networks worldwide.
Manufactured with high-permeability grain-oriented cold-rolled silicon steel sheets and high-conductivity copper or aluminum windings, this oil immersed distribution transformer features a fully sealed corrugated tank structure and vacuum oil injection process. Different from traditional transformer structures, the optimized flyback topology effectively suppresses voltage spike interference, reduces harmonic loss, and improves the overall operational stability of the equipment. The whole machine complies with IEEE, IEC and CE international power equipment standards, with stable output voltage, low operation noise and long service life, belonging to high-efficiency energy-saving medium voltage power distribution transformer equipment.
As a mainstream three-phase power conversion device in the power industry, this medium voltage oil immersed transformer supports on-load and off-load voltage regulation according to actual working conditions. The fully enclosed oil cooling system eliminates the need for an oil conservator, realizes self-adaptive heat dissipation through external corrugated fins, and effectively adapts to harsh outdoor and indoor working environments. It is the preferred core equipment for step-down power conversion in medium and low voltage power distribution systems.
2. Core Product Features
2.1 Advanced Flyback Topology Optimization
Equipped with professional oil immersed flyback topology structure, the transformer solves the problem of unstable voltage conversion of traditional distribution transformers during load fluctuation. This structural design can effectively absorb and suppress transient voltage surges, reduce circuit resonance interference, improve the anti-interference ability of the power system, and ensure continuous and stable power output under variable load conditions. It is a key technical advantage different from ordinary dry-type transformers and conventional oil immersed transformers.
2.2 Full Range Voltage and Capacity Coverage
The product covers mainstream medium voltage grades of 6kV, 10kV, 11kV and 15kV, and the capacity spectrum ranges from 50kVA small power model to 3150kVA large industrial model, which can fully meet the power demand of different scenarios from civil community power supply to large industrial park power distribution. Users can freely match voltage level and capacity parameters according to grid configuration and load demand, with extremely high equipment compatibility and application flexibility.
2.3 High Efficiency and Energy Saving Performance
Adopting step-lap core splicing technology and high-quality silicon steel core materials, the three-phase distribution transformer greatly reduces no-load loss, no-load current and load loss. Compared with traditional old-fashioned transformers, the energy-saving efficiency is increased by more than 25%, which fully meets international energy efficiency standards. The optimized winding structure and oil circulation heat dissipation system further reduce operational energy consumption, realizing long-term low-cost and high-efficiency operation of the equipment.
2.4 Fully Sealed Maintenance-Free Structure
The whole machine adopts a fully sealed welded steel tank and vacuum oil injection process, which completely isolates the internal insulating oil and windings from external air and moisture. It avoids oil aging, insulation deterioration and internal component corrosion caused by environmental factors. The corrugated tank design automatically adapts to the volume change of insulating oil during heating and cooling, without oil leakage failure, realizing zero daily maintenance, greatly reducing later operation and maintenance costs for users.
2.5 High Safety and Strong Environmental Adaptability
Built-in pressure relief valve, temperature monitoring device and over-current protection structure, the oil immersed distribution transformer can automatically release internal pressure and cut off the circuit in case of overload, short circuit and over-temperature faults, effectively avoiding equipment damage and safety accidents. The whole machine has the characteristics of rainproof, dustproof, corrosion resistance and low temperature resistance, and can operate stably in outdoor open-air environments, industrial dusty environments and humid coastal areas for a long time. The optional high-flash-point insulating oil further improves the fire safety level of the equipment.
2.6 Low Noise and Stable Operation
Through core vibration reduction optimization and winding fixed damping design, the operation noise of the three-phase transformer is effectively controlled within the industry low standard range. The flyback topology optimizes the current transmission curve, avoids harmonic vibration noise generated by current fluctuation, and will not cause noise pollution to the surrounding working and living environment, which is suitable for residential areas, commercial districts and other noise-sensitive scenarios.
3. Core Purpose
The core function of the 6kV-15kV 50-3150kVA three-phase oil immersed flyback topology distribution transformer is to complete efficient voltage conversion and power transmission in medium and low voltage power distribution systems. It mainly realizes the step-down conversion from 6kV, 10kV, 11kV, 15kV medium voltage grid power to 0.4kV low voltage industrial and civil power, providing standardized and stable three-phase power for terminal electrical equipment.
This medium voltage distribution transformer undertakes the core tasks of power grid voltage regulation, power distribution and load balancing in regional power supply systems. It can effectively stabilize grid voltage fluctuation, filter power harmonics, improve power supply quality, and ensure the continuity and reliability of power consumption for industrial production, commercial operation and residential life. At the same time, it can be used for power matching and energy conversion of new energy power generation systems, supporting stable grid connection of distributed power sources.
4. Main Application Scenarios
4.1 Urban and Rural Power Grid Distribution
As the core equipment of urban and rural power distribution networks, this 10kV/11kV oil immersed transformer is widely used in community substations, street power distribution stations and rural power grid renovation projects. It adapts to conventional medium voltage grid standards, stably converts grid voltage to civil low voltage power, and guarantees daily residential power consumption, community public facility power supply and rural production power demand.
4.2 Industrial Factory Power Supply
The 6kV-15kV high-capacity three-phase distribution transformer (500kVA-3150kVA) is suitable for large manufacturing factories, chemical plants, metallurgical enterprises, textile factories and processing plants. It can bear long-term high-load industrial power consumption, adapt to frequent start-stop of industrial equipment and fluctuating load conditions, and provide stable power support for mechanical processing, production lines and industrial electrical equipment.
4.3 Commercial and Public Facilities
It is applied to shopping malls, office buildings, hospitals, schools, stadiums and other large commercial and public buildings. The low-noise and high-stability operation characteristics of the oil immersed flyback topology transformer meet the power supply requirements of high-precision electrical equipment and long-term continuous power consumption of public facilities, ensuring zero power failure and stable voltage in public service scenarios.
4.4 New Energy Power Generation System
Matching photovoltaic power stations, wind power stations and energy storage power stations, this medium voltage transformer completes power conversion and grid connection work for new energy power generation. It can adapt to the unstable power output characteristics of new energy equipment, stabilize grid connection voltage, reduce harmonic interference, and improve the safety and stability of new energy power grid connection, which is a special supporting equipment for new energy power distribution projects.
4.5 Special Engineering and Outdoor Scenarios
It is widely used in railway transit, highway engineering, mining sites, petroleum and petrochemical projects and field construction sites. The equipment's excellent dustproof, corrosion-resistant and rainproof performance adapts to harsh outdoor working conditions, and the flexible capacity and voltage grade matching can meet the temporary and long-term power supply needs of various special engineering projects.
5. Frequently Asked Questions (FAQ)
Q1: What is the difference between flyback topology oil immersed transformer and ordinary oil immersed transformer?
Different from ordinary conventional oil immersed transformers that adopt traditional linear topology, this product adopts optimized flyback topology design. It has stronger transient voltage resistance and harmonic suppression capability, can effectively cope with load sudden change and grid voltage fluctuation, and has more stable power output. In addition, it has lower no-load loss and operation noise, higher energy-saving efficiency and longer service life, and is more suitable for complex industrial power distribution and new energy grid connection scenarios with unstable loads.
Q2: How to select the correct voltage grade and capacity model for the 50-3150kVA distribution transformer?
For model selection, the grid input voltage of the application scenario shall be confirmed first: 6kV/10kV for conventional urban and rural civil power grids, 11kV/15kV for industrial parks and special engineering power grids. For capacity selection, 50-315kVA is suitable for residential communities and small commercial scenarios, 400-1250kVA for medium-sized factories and comprehensive buildings, and 1600-3150kVA for large industrial enterprises and new energy power stations. It is recommended to reserve 10%-20% redundant capacity according to the actual maximum load power to avoid long-term overload operation of the transformer.
Q3: Does the fully sealed oil immersed distribution transformer require daily maintenance?
This fully sealed oil immersed three-phase transformer basically realizes maintenance-free operation under normal working conditions. The fully enclosed structure prevents insulating oil deterioration and moisture ingress, and there is no need for regular oil replacement and oil level inspection. Users only need to conduct quarterly visual inspection of the equipment shell, wiring terminals and protective devices, and clean the surface dust regularly. Compared with traditional open-type transformers, it greatly reduces daily maintenance workload and later operation cost, and is more suitable for unattended substation and outdoor long-term operation scenarios.
