400kVA Medium & High Voltage Oil Filled Power Transformer
400kVA Medium & High Voltage Oil Filled Power Transformer | 10kV Input & 13.2/0.46kV Voltage Grade Product Document
1. Product Description
This 400kVA medium & high voltage oil filled transformer is a heavy-duty three-phase power distribution device engineered for commercial, industrial and municipal grid power conversion. Designed with dual applicable high input voltage standards of 10kV and 13.2kV, this oil immersed power transformer features a professional 13.2/0.46kV voltage transformation ratio, which steps down medium and high grid voltage to standard 0.46kV low-voltage output for end-user electrical equipment. As a mainstream high-efficiency power transformer in the medium voltage distribution system, it adopts mature oil-filled cooling and insulation technology, fully compliant with IEC and ANSI industry standards for global power engineering applications.
Manufactured with high-grade grain-oriented silicon steel core and oxygen-free pure copper windings, the 10kV input oil filled power transformer effectively reduces no-load loss and electromagnetic leakage during long-term operation. The fully sealed welded steel tank structure integrates premium insulating mineral oil, which serves dual functions of heat dissipation and electrical insulation. With a fixed rated capacity of 400kVA, this medium-high voltage transformer supports stable operation under both 50Hz and 60Hz grid frequencies, adapting to most regional power grid environments worldwide. Optimized winding layout and voltage regulation design ensure balanced three-phase output, effectively avoiding voltage deviation and power quality instability caused by unbalanced load, making it a reliable core device for medium-voltage power distribution networks.
2. Core Product Uses
The core purpose of this 400kVA 13.2/0.46kV oil filled transformer is medium-to-low voltage power conversion and decentralized power distribution in medium and high voltage power systems. It mainly undertakes the task of stepping down 10kV and 13.2kV medium-high voltage overhead and cable grid power to 0.46kV industrial and civil standard low voltage, providing safe, stable and qualified three-phase power for terminal electrical systems. It effectively solves the power mismatch problem between medium-voltage main grids and low-voltage power consumption equipment in industrial parks, urban communities and commercial zones.
As a key medium & high voltage power transformation product, this oil immersed transformer also undertakes grid load balancing and power quality optimization functions. It can effectively suppress grid voltage fluctuation, reduce line transmission loss, and improve the overall power supply efficiency of regional distribution networks. Built with reliable overcurrent, overload and short-circuit protection performance, the equipment can automatically isolate faulty circuits when encountering grid surge or load abnormality, protecting rear-end electrical facilities and grid lines. In addition, it supports long-term continuous full-load and variable-load operation, maintaining stable voltage output under complex load conditions, and ensuring the continuity and safety of industrial production and civilian power supply.
3. Main Application Scenarios
3.1 Urban and Rural Medium Voltage Power Grid Renovation
This 10kV input 400kVA oil filled power transformer is widely used in urban and rural power grid upgrading and new distribution network construction projects. The dual 10kV and 13.2kV high voltage adaptability perfectly matches the mainstream medium voltage grid standards in Asia, America and Southeast Asia, while the 0.46kV low-voltage output meets the power demand of modern residential communities, urban commercial blocks and rural centralized power supply areas. Its sealed oil-filled structure adapts to outdoor overhead and substation installation environments, effectively improving the power supply capacity and stability of regional basic power grids.
3.2 Industrial Park and Factory Power Distribution
Ideal for medium-scale industrial parks, manufacturing factories, processing plants and mining enterprises that require stable medium-high voltage power conversion. The 400kVA rated capacity is perfectly matched with the conventional power load of small and medium-sized industrial production lines, mechanical equipment and workshop electrical systems. The oil immersed heat dissipation system can cope with long-term high-load continuous operation of industrial scenarios, avoiding equipment overheating and power failure risks. It is also applicable for power supporting of factory auxiliary facilities such as ventilation systems, lighting systems and power distribution cabinets.
3.3 Commercial Complex and Public Facility Power Supply
Suitable for power distribution of large shopping malls, office buildings, hospitals, schools and urban public transportation facilities. These scenarios have stable and concentrated three-phase power demand, and the 13.2/0.46kV voltage conversion capability of this medium & high voltage transformer can provide consistent high-quality low-voltage power for central air conditioning, elevator equipment, intelligent monitoring systems and emergency power supply devices, ensuring the stable operation of key urban public infrastructure.
3.4 New Energy Power Station Power Grid Connection
It serves as an essential power transformation device for distributed solar photovoltaic power stations, small wind power plants and hydropower stations. New energy power generation has natural voltage and frequency fluctuation characteristics, and this high-stability oil filled transformer can stabilize power output quality, convert irregular medium-voltage power generated by new energy equipment into standard 0.46kV low-voltage power, and support on-grid power transmission and local self-use power distribution, improving the utilization rate of new energy power generation.
3.5 Overseas Engineering and Cross-Regional Power Projects
Thanks to its dual 10kV/13.2kV high voltage compatibility and global frequency adaptability, this 400kVA oil immersed power transformer is widely used in overseas power engineering construction, cross-border industrial investment projects and regional power aid projects. It avoids the trouble of customized equipment for different grid voltage standards, greatly simplifies project procurement procedures and reduces engineering construction costs, becoming a universal medium-high voltage power transformation solution for international power distribution projects.
4. Product Core Features
4.1 Dual Medium-High Voltage Adaptability & Accurate Voltage Ratio
Different from single-voltage ordinary transformers, this oil filled power transformer supports both 10kV conventional input voltage and 13.2kV high medium voltage input, covering two mainstream global medium voltage grid standards. The fixed 13.2/0.46kV professional voltage transformation ratio ensures accurate and stable step-down output, with extremely low voltage deviation rate under no-load and full-load conditions. This multi-voltage compatibility greatly improves product applicability, meeting the diversified voltage requirements of different regional power grids and engineering projects.
4.2 400kVA Fixed Rated Capacity for Universal Medium Load
The standard 400kVA rated capacity is the most mainstream specification for medium-scale power distribution scenarios, perfectly balancing power supply capacity and equipment cost. It neither causes energy waste from excessive capacity nor suffers from insufficient load-bearing capacity, fully adapting to the power demand of urban communities, medium-sized factories and commercial facilities. The optimized load design enables the transformer to operate efficiently under 30%–100% variable load, with strong load impact resistance and stable operation performance.
4.3 High-Efficiency Oil-Filled Cooling & Insulation System
Adopting high-purity anti-aging insulating mineral oil, the equipment realizes efficient natural circulation heat dissipation and comprehensive insulation protection. The fully sealed oil immersed structure completely isolates internal windings and iron core from external moisture, dust and corrosive gases, effectively preventing insulation aging and breakdown. The excellent heat dissipation performance ensures uniform temperature distribution inside the transformer, avoiding local overheating during long-term high-load operation and greatly extending the service life of internal components.
4.4 Low Loss & Energy Saving, High Operation Efficiency
Using ultra-low loss grain-oriented silicon steel core and high-conductivity pure copper windings, this medium & high voltage power transformer minimizes no-load loss, load loss and electromagnetic leakage loss. The overall operation efficiency is higher than 98%, which can effectively reduce long-term power transmission energy consumption for power grid operators and end users. It meets international energy-saving and low-carbon construction standards for modern power grids, helping enterprises and power departments reduce daily operation and electricity costs.
4.5 Robust Sealed Structure & Strong Environmental Adaptability
The all-welded integral steel tank has high mechanical strength and excellent tightness, effectively preventing insulating oil leakage and external water and gas infiltration. The surface adopts multi-layer anti-corrosion and ultraviolet-proof spraying treatment, which can resist harsh outdoor environments such as strong wind, heavy rain, high temperature and low temperature. The equipment can operate stably in the temperature range of -40℃ to +50℃, suitable for outdoor substation, pole-mounted and indoor foundation installation in various regions, with strong environmental tolerance and low weathering failure rate.
4.6 Stable Three-Phase Output & Complete Safety Protection
The balanced three-phase winding design ensures uniform load distribution of each phase, with strong adaptability to unbalanced load operation. It is equipped with multiple safety protection mechanisms including overload protection, short-circuit protection and overvoltage protection, which can quickly respond to grid abnormalities and cut off faulty circuits to protect equipment and rear-end loads. The standardized grounding structure and high-safety insulating accessories further improve the overall operation safety of the transformer, ensuring long-term reliable operation of the power distribution system.
5. Frequently Asked Questions (FAQ)
5.1 What is the difference between 10kV input and 13.2kV input working modes?
This 400kVA oil filled power transformer is designed with dual medium-high voltage input adaptation for global grid compatibility. When working with a 10kV input voltage system, it is suitable for conventional urban and rural power grids in most Asian, African and European regions, achieving standard 13.2kV equivalent voltage conversion and stable 0.46kV low-voltage output. When matching a 13.2kV medium voltage grid, it adapts to American and Southeast Asian high-standard medium voltage distribution networks, maintaining consistent transformation efficiency and power quality. No internal component replacement or parameter adjustment is required for mode switching, and the equipment can automatically adapt to the two voltage input environments with stable overall performance.
5.2 What installation environments are suitable for this 13.2/0.46kV oil immersed transformer?
This medium & high voltage oil filled transformer supports multiple installation methods and scenarios. It can be installed on concrete foundations in indoor box substations for factory and commercial building power distribution, and can also adopt outdoor pole-mounted and ground-mounted installation for urban and rural overhead power grids. The fully sealed anti-corrosion structure allows long-term outdoor open-air operation, resisting rainwater erosion, ultraviolet aging and atmospheric corrosion. It is also applicable for semi-outdoor substation environments with poor ventilation, thanks to its efficient natural oil cooling system that does not rely on external ventilation conditions for heat dissipation.
5.3 How to judge whether the 400kVA capacity matches the actual power load?
The 400kVA rated capacity is applicable for medium-scale power consumption scenarios with a total actual load of 280kW to 360kW. For industrial scenarios with frequent startup of mechanical equipment and impact loads, it is recommended to control the long-term operating load within 80% of the rated capacity to reserve overload margin. For conventional residential and commercial scenarios with stable load, the full-load operation of the transformer can be maintained for a long time. If the actual load is continuously lower than 50% or higher than 90% for a long time, it is necessary to replace the transformer with a more appropriate capacity to avoid energy waste or equipment overload operation risks.
