Oil Immersed Transformers 10KV 220V Three Phase 35KV Input Voltage 440V Output Voltage
1. Product Description
The Oil Immersed Transformers with 35KV input voltage, multi-grade output of 10KV, 440V and 220V, and universal 50/60Hz frequency adaptability is a professional three-phase power transformation device designed for medium and high voltage power distribution systems. This heavy-duty three-phase oil immersed transformer integrates multi-level voltage conversion functions, supporting 35KV high-voltage grid access, while stably outputting 10KV medium transmission voltage, 440V industrial three-phase voltage and 220V civilian single-phase voltage. Fully manufactured and tested in compliance with IEC and international power industry standards, this multi-voltage oil filled transformer adapts to global 50Hz and 60Hz AC power grid operation, solving the voltage matching problems of industrial transmission, equipment power supply and residential power consumption in one single unit.
Adopting high-quality low-loss grain-oriented silicon steel core and high-purity oxygen-free copper winding structure, this 35KV input three-phase oil immersed power transformer effectively reduces no-load loss, load loss and magnetic flux leakage during long-term continuous operation. It adopts mature oil-natural air-natural (ONAN) cooling mode and fully sealed corrugated oil tank structure, with high-purity insulating oil inside undertaking dual functions of internal insulation and circulating heat dissipation. Different from traditional single-voltage transformers, this equipment realizes three common voltage output modes, covering 10KV regional secondary power transmission, 440V industrial equipment power supply and 220V daily civilian power supply. The optimized internal magnetic circuit and winding design ensure stable voltage output and strong anti-interference ability, and can operate stably in both 50Hz conventional power grids and 60Hz industrial power systems without performance attenuation.
2. Core Uses
This multi-functional three-phase oil immersed transformer mainly undertakes hierarchical voltage conversion and multi-scenario power distribution tasks for 35KV medium and high voltage main grids. Its core working function is to step down 35KV high-voltage electric energy transmitted by regional hub grids to 10KV medium voltage for long-distance secondary power transmission and regional grid shunting. Meanwhile, it further converts voltage into standard 440V three-phase industrial power and 220V civilian low-voltage power, realizing integrated power supply for power grid transmission, industrial production and residential life. It effectively makes up for the functional single defect of traditional transformers that can only achieve single voltage conversion, greatly improving the comprehensive utilization rate of power transformation equipment.
In daily power system operation, the 50/60Hz dual-frequency oil immersed distribution transformer also undertakes key tasks such as grid load balancing, power quality optimization and line loss reduction. It can automatically adapt to load fluctuations in peak and off-peak power consumption periods, stabilize terminal voltage of 10KV, 440V and 220V loops, and avoid voltage drop or surge caused by long-distance power transmission and sudden load changes. The low-loss operation design reduces power transmission energy consumption, improves the overall operating efficiency of medium and high voltage power distribution systems, and provides reliable overvoltage and overload protection for subsequent power grid equipment and terminal electrical devices.
3. Application Scenarios
3.1 Regional Substation Power Transmission and Distribution
This 35KV input multi-output oil immersed transformer is widely used in urban central substations, regional power distribution hubs and suburban grid upgrading projects. The equipment accesses 35KV high-voltage main grid power, uses 10KV output for secondary power transmission to surrounding industrial zones and township power grids, and matches 440V and 220V dual low-voltage outputs to meet local industrial and residential power demand. The dual 50Hz and 60Hz frequency compatibility enables it to adapt to different regional grid frequency standards, and the oil immersed heat dissipation structure supports long-term full-load stable operation of hub substations.
3.2 Large Industrial Park Power Supply
It is the preferred power transformation equipment for large industrial parks, chemical manufacturing bases, mining enterprises and mechanical processing zones. The 10KV medium-voltage output can supply power for regional industrial partition power distribution and secondary transformation equipment; the 440V three-phase output perfectly matches the operating voltage of large industrial motors, automated production lines and heavy mechanical equipment; the 220V output meets the power demand of factory office areas, living supporting facilities and on-site monitoring systems. It can fully adapt to long-term high-load operation and frequent load fluctuation in industrial scenarios.
3.3 New Energy Power Station Grid Connection Projects
In centralized photovoltaic power stations, wind power plants and energy storage power station projects, this three-phase oil immersed transformer plays a key role in grid-connected voltage conversion and power quality optimization. The new energy generated electric energy is converted into 10KV medium voltage through the equipment for grid-connected transmission to 35KV main grid, while 440V and 220V low voltage outputs provide self-use power for power station operation equipment, monitoring systems and staff living facilities. The 50/60Hz universal frequency design adapts to different new energy grid-connected system standards, and effectively suppresses power fluctuation caused by intermittent power generation.
3.4 Urban and Rural Municipal Power Grid Construction
In urban new district power supply construction, old urban grid renovation and rural power grid upgrading projects, this multi-voltage oil immersed transformer shows excellent applicability. The 220V low voltage meets daily power consumption of residential households and municipal public facilities such as street lamps and water supply equipment; the 440V voltage supports municipal engineering equipment and commercial facility power consumption; the 10KV medium voltage realizes interconnection and capacity expansion of regional power grids. The fully sealed outdoor structure adapts to open-air substation installation, with strong weather resistance and low failure rate, ensuring stable operation of municipal power systems.
4. Product Features
4.1 Multi-Voltage Grade Integrated Output, Ultra-High Compatibility
This three-phase oil immersed transformer adopts an innovative multi-voltage integrated design, with 35KV high-voltage input, and supports simultaneous stable output of 10KV, 440V and 220V multiple voltage grades. It covers medium-voltage power transmission, industrial three-phase power supply and civilian single-phase power supply scenarios, realizing multi-purpose of one equipment. The voltage conversion precision is high with tiny output fluctuation, and it can perfectly match various grid systems and terminal electrical equipment. It solves the problem of repeated equipment investment caused by single voltage function of traditional transformers, with extremely high comprehensive applicability.
4.2 50/60Hz Dual-Frequency Universal Adaptability
Professionally optimized for global power grid standards, this oil immersed power transformer can operate stably in both 50Hz and 60Hz AC power systems without any parameter adjustment or structural modification. The internal core magnetic circuit and winding parameters are precisely calibrated for dual-frequency operation, which will not cause extra heat generation, efficiency reduction or voltage instability due to frequency switching. It is compatible with most power grid standards in Asia, Europe, America and other regions, fully meeting the needs of cross-regional power engineering construction and equipment replacement.
4.3 Low-Loss Energy-Saving Structure & High Operational Efficiency
Equipped with high-performance low-loss silicon steel core and high-conductivity oxygen-free copper winding, the transformer optimizes internal magnetic circuit and circuit layout, effectively reducing no-load loss, load loss and magnetic flux leakage loss. Compared with traditional 35KV grade transformers of the same type, the overall power transmission efficiency is significantly improved. It can maintain low-energy stable operation under long-term full-load and variable load conditions, effectively reducing long-term power consumption and operation costs for power grid enterprises and industrial users, meeting the energy-saving and consumption-reducing requirements of modern smart power grids.
4.4 Fully Sealed Oil Immersed Design & Strong Stability
The whole machine adopts an integrated fully sealed corrugated oil tank and vacuum pressure oil injection process, which completely isolates internal insulating oil from external air, moisture and dust. It avoids oil aging, emulsification and insulation performance degradation caused by long-term outdoor operation, realizing long-term maintenance-free operation. The ONAN circulating oil cooling system has uniform and efficient heat dissipation, which can quickly export heat generated by high-load operation, ensuring stable temperature and performance of the equipment during long-term continuous operation, with long service life and low failure rate.
4.5 Excellent Environmental Adaptability & Safety Performance
The outer shell is treated with overall anti-corrosion, rust-proof and weather-resistant coating, which can operate stably in high temperature, low temperature, humid, dusty and other harsh working environments. It supports outdoor open-air substation and indoor closed substation installation, adapting to industrial parks, field new energy power stations, municipal substations and other complex scenarios. Equipped with professional overcurrent, overvoltage and short-circuit protection performance, it can resist instantaneous current impact and load surge, ensuring safe and reliable operation of the entire power distribution system.
5. Frequently Asked Questions (FAQ)
5.1 What are the respective applicable scenarios for 10KV, 440V and 220V output voltages?
Each voltage grade corresponds to independent and professional application scenarios. The 10KV medium-voltage output is mainly used for regional long-distance power transmission, substation secondary power distribution and industrial grid interconnection, which can effectively reduce line transmission loss. The 440V three-phase output is dedicated to large industrial motors, automated production lines, mining machinery and commercial high-power electrical equipment, adapting to industrial heavy-load power demand. The 220V low-voltage output is applied to residential household power supply, office equipment, lighting systems and municipal public facilities, covering daily civilian power consumption needs. The multi-output design realizes one machine covering transmission, industry and civilian power supply, greatly saving project cost and installation space.
5.2 Can this transformer automatically adapt to 50Hz and 60Hz grid frequency switching?
Yes, this three-phase oil immersed transformer is professionally designed for dual 50/60Hz frequency universal operation. All internal electrical parameters, core structure and winding matching are optimized for dual-frequency working conditions. It can be directly put into use in both 50Hz conventional civil power grids and 60Hz industrial and overseas power systems without manual parameter adjustment or accessory replacement. During frequency switching and operation, the voltage conversion accuracy, heat dissipation efficiency and load-bearing capacity remain stable, no overload heating or power quality attenuation occurs, which is very suitable for global cross-regional power projects.
5.3 What are the core advantages of 35KV input multi-voltage oil immersed transformer compared with conventional transformers?
Traditional single-function transformers can only complete single-grade voltage conversion, requiring multiple sets of equipment to realize power transmission, industrial power supply and civilian power supply at the same time, resulting in large floor space and high investment cost. This 35KV input oil immersed transformer integrates 10KV power transmission, 440V industrial power supply and 220V civilian power supply functions, with more flexible and diverse application scenarios. In addition, it has dual 50/60Hz frequency adaptability, lower operating loss and stronger environmental adaptability. It can meet the comprehensive power demand of hub power transmission, industrial production and municipal power supply, with higher cost performance and operational stability than traditional single-voltage transformers.
