5MVA 6.3MVA 35KV 6.3KV Three Phase Oil Immersed Power Transformer
1. Product Overview
The High Frequency Electric Step up and Step Down 5MVA 6.3MVA 35KV 6.3KV Three Phase Oil Immersed Power Transformer is a high-performance medium-capacity power conversion equipment independently developed for medium and high voltage power grid systems, new energy power generation, and industrial power supply scenarios. This three-phase oil immersed power transformer supports dual rated capacities of 5MVA and 6.3MVA, with a 35KV high-voltage input end and a 6.3KV low-voltage output end, realizing bidirectional step-up and step-down voltage conversion. Adopting mature oil-immersed cooling technology and high-frequency electrical optimization design, the equipment effectively solves the power conversion and voltage matching problems of medium-voltage power systems, and is a core key device for stable power transmission, voltage regulation and energy distribution in industrial and municipal power grids.
Manufactured in strict accordance with international IEC standards and national GB power transformer specifications, this 35KV 6.3KV power transformer uses high-quality cold-rolled silicon steel sheets and oxygen-free copper winding coils. It optimizes the internal insulation structure and oil circulation heat dissipation system, achieving excellent performance in low loss, low noise and strong overload resistance. As a mainstream medium-capacity oil immersed transformer, it perfectly adapts to high-frequency power operation conditions and long-term continuous load operation requirements, and has been widely recognized in the global medium-voltage power equipment market.
2. Core Product Features
2.1 Excellent High-Frequency Operation Performance
This high frequency step up and step down transformer is specially optimized for high-frequency power working conditions. The improved winding structure and magnetic circuit design effectively suppress high-frequency harmonic loss and magnetic leakage, ensuring stable power conversion efficiency under high-frequency power transmission scenarios. Compared with ordinary power transformers, it has stronger high-frequency load adaptability, can cope with fluctuating high-frequency power input, and maintains efficient and stable operation without voltage distortion or power attenuation.
2.2 Dual-Capacity Flexible Matching
Supporting two mainstream rated capacities of 5MVA and 6.3MVA, the three phase oil immersed power transformer can flexibly match different power load demands. The 5MVA specification is suitable for conventional medium-scale power supply and distribution systems, while the 6.3MVA high-capacity version meets the high-load operation requirements of large industrial parks and new energy power stations. The dual-capacity design improves the product’s scene compatibility and reduces equipment selection and replacement costs for users.
2.3 Reliable Oil-Immersed Cooling & Insulation System
Adopting advanced ONAN oil natural circulation cooling technology, the transformer is filled with high-dielectric-strength mineral insulating oil, which realizes efficient heat conduction and temperature control. The fully sealed welded steel tank structure is equipped with reinforced radiators, which quickly dissipates heat generated by long-term full-load operation and avoids local overheating. At the same time, the multi-layer composite insulation structure improves the internal voltage resistance and partial discharge resistance, effectively preventing insulation aging and breakdown, and greatly extending the service life of the equipment.
2.4 Low Loss & Energy Saving
The core adopts high-permeability low-loss cold-rolled silicon steel sheets, and the winding uses high-purity oxygen-free copper wires with multi-layer cylindrical winding technology. The optimized magnetic circuit and circuit structure significantly reduce no-load loss, load loss and excitation current. This energy-saving oil immersed power transformer can effectively reduce long-term operation power consumption and grid operation cost, with remarkable energy-saving and environmental protection benefits, meeting the current green power grid construction standards.
2.5 High Structural Stability & Safety
All internal fasteners adopt anti-loosening reinforcement treatment, and the overall structure is compact and shock-resistant. Equipped with standard safety accessories such as Buchholz relay, pressure relief device, oil level thermometer and silica gel respirator, the equipment can monitor operating status in real time and automatically respond to faults such as internal short circuit, oil leakage and overvoltage. It has strong short-circuit resistance and overload capacity, and can operate stably in harsh outdoor and industrial environments for a long time.
3. Core Purpose
The core function of the 5MVA/6.3MVA 35KV to 6.3KV step up step down transformer is to realize bidirectional voltage conversion, power transmission and power distribution in medium-voltage power systems. It mainly undertakes the tasks of converting 35KV high-voltage grid electric energy into 6.3KV medium-voltage electric energy for industrial production and regional power supply, and can also boost 6.3KV power generated by distributed power sources to 35KV for grid-connected transmission.
In power system operation, this medium voltage oil immersed transformer effectively stabilizes grid voltage, balances power load distribution, reduces power transmission loss, and ensures the safety and continuity of power supply. It serves as an important power conversion hub between high-voltage transmission grids and medium-voltage user terminals, and also provides reliable voltage matching support for new energy grid-connected power generation, industrial frequency conversion power supply and high-frequency power transmission systems.
4. Main Application Scenarios
4.1 New Energy Power Generation Industry
Widely used in photovoltaic power stations, wind power plants and energy storage power stations. The high-frequency adaptive design of the transformer can adapt to the unstable high-frequency power output of new energy units, and complete the step-up and grid-connected work of 6.3KV generated power to 35KV grid power. The 5MVA and 6.3MVA capacity specifications perfectly match the power demand of medium-sized new energy power stations, solving the voltage matching and power transmission problems of distributed new energy power generation systems.
4.2 Industrial Production & Manufacturing Parks
It is the core power supply and distribution equipment for large industrial parks, chemical plants, metallurgical factories and mining enterprises. Many industrial high-frequency equipment and medium-voltage production lines require stable 6.3KV power supply. This 35KV 6.3KV three-phase transformer can step down the 35KV municipal grid power to 6.3KV industrial dedicated power, ensuring the stable operation of industrial frequency conversion equipment, high-power motors and automated production lines. Its low-loss and anti-interference performance effectively avoids production shutdown losses caused by power voltage fluctuation.
4.3 Municipal Power Grid & Substation Construction
Suitable for urban and rural regional medium-voltage substations, community power distribution stations and industrial and mining centralized power supply projects. As a key intermediate conversion device of the 35KV urban power grid, it undertakes the task of regional power step-down distribution, realizes hierarchical power transmission of the power grid, and improves the rationality and stability of municipal power grid operation. The fully sealed oil-immersed structure is suitable for outdoor substation installation, with strong environmental adaptability and low later maintenance cost.
4.4 High-Frequency Power Transmission & Special Power Supply Projects
For high-frequency power transmission, industrial high-frequency heating, electric power testing and other special scenarios, this high frequency electric power transformer provides accurate voltage conversion and stable power support. Its excellent high-frequency operation performance can suppress harmonic interference in high-frequency power systems, ensure the power quality of special equipment, and meet the high-standard power supply requirements of high-precision industrial and electric power engineering projects.
5. FAQ (Frequently Asked Questions)
5.1 What is the difference between 5MVA and 6.3MVA specifications of this oil immersed transformer?
The 5MVA and 6.3MVA are two rated capacity configurations of the same series of three phase oil immersed power transformer, with consistent voltage levels (35KV/6.3KV), structural design and core performance parameters. The main difference lies in the maximum bearable load power: the 5MVA model is suitable for medium-load power supply scenarios with stable daily power consumption, such as small and medium-sized industrial parks and regional community substations; the 6.3MVA model has higher overload tolerance, which can meet the peak power consumption demand of large industrial enterprises and medium-sized new energy power stations, and is more suitable for scenarios with large load fluctuation and long-term high-load operation. Users can select the specification according to the actual maximum load of the power system.
5.2 Can this 35KV 6.3KV transformer operate stably in high-frequency power systems?
Yes, this product is a professional high frequency electric step up and step down transformer specially optimized for high-frequency power working conditions, which is completely different from ordinary industrial power transformers. It adopts optimized high-frequency magnetic circuit and winding anti-interference design, which can effectively reduce high-frequency harmonic loss and magnetic leakage loss, and avoid equipment heating, voltage deviation and efficiency reduction caused by high-frequency operation. The whole machine is tested by high-frequency power impact, and can operate stably for a long time in 50/60Hz conventional power grids and high-frequency power transmission systems, with strong adaptability to complex high-frequency power working conditions.
5.3 What are the daily maintenance requirements for this oil immersed power transformer?
This three-phase oil immersed transformer has the advantage of low maintenance, and the daily maintenance work is simple and standardized. First, regularly check the transformer oil level and oil quality, replace insulating oil regularly according to the operating environment to ensure heat dissipation and insulation performance; second, inspect the sealing performance of the oil tank to prevent oil leakage and dust ingress; third, regularly monitor the operating temperature, load current and voltage parameters through the supporting detection device to avoid long-term overload operation; finally, check the working status of safety accessories such as respirator and pressure relief device regularly, and replace aging accessories in time. Under standard maintenance, the equipment can achieve a service life of more than 20 years.
