50KV Output 220V Three-Phase Oil Immersed Electric Transformers
50KV Output 220V Three-Phase Oil Immersed Electric Transformers with 440V Output and 69KV Input Voltage
1. Product Description
The 69KV Input, 50KV, 440V and 220V Output Three-Phase Oil Immersed Electric Transformer is a professional multi-voltage grade power transformation equipment developed for medium and high-voltage power transmission and distribution systems. This industrial-grade three-phase oil immersed transformer adopts a mature oil natural cooling and fully sealed structure, supporting 69KV high-voltage grid input, with flexible multi-level output including 50KV medium transmission voltage, 440V industrial three-phase voltage and 220V civilian single-phase voltage. It complies with IEC international electrical standards and mainstream grid operation specifications, serving as a versatile power conversion unit for power substations, industrial heavy-load scenarios and municipal power distribution projects.
Manufactured with high-quality grain-oriented silicon steel core and high-purity oxygen-free copper windings, this 69KV class oil immersed electric transformer effectively reduces no-load loss and stray loss during long-term operation. The internal refined insulating oil acts as both insulation medium and cooling medium, filling the gaps between windings and cores to isolate air and prevent insulation aging. Different from single-voltage transformers, this model integrates high, medium and low voltage output functions in one unit, realizing switching and matching of 50KV transmission voltage, 440V industrial power and 220V household power. The optimized corrugated oil tank structure enhances heat dissipation efficiency, ensuring stable and safe operation under continuous load and fluctuating grid conditions.
2. Core Uses
This three-phase oil immersed electric transformer focuses on multi-stage voltage conversion and hierarchical power distribution for 69KV medium and high voltage power grids. Its core function is to step down 69KV high-voltage power transmitted by regional main grids to 50KV medium-voltage power for secondary long-distance transmission, while further converting voltage to standard 440V three-phase industrial power and 220V civilian power for terminal load use. It solves the pain points of traditional power distribution systems that require multiple transformers for graded voltage conversion, greatly simplifying the grid structure and reducing equipment investment costs.
In daily grid operation, the 69KV input multi-output oil immersed transformer also undertakes key tasks such as grid voltage stabilization, load balancing and power quality optimization. It can adapt to peak and off-peak load changes of industrial production and residential power consumption, effectively suppress voltage drop and voltage surge in power lines, and maintain stable output of 50KV, 440V and 220V voltage levels. The low-loss operation design reduces power transmission line loss, improves the overall energy utilization rate of the power system, and provides reliable power guarantee for both large-scale power transmission and scattered terminal power supply.
3. Application Scenarios
3.1 Regional Power Substation Power Transmission and Distribution
This 69KV input three-phase oil immersed transformer is widely deployed in urban hub substations, regional power distribution centers and suburban power grid upgrading projects. The equipment converts 69KV main grid electricity into 50KV medium voltage for long-distance secondary power transmission to surrounding areas, and simultaneously outputs 440V and 220V low voltage for local industrial and residential power supply. It perfectly meets the dual demand of regional power grid long-distance transmission and on-site power distribution, and the oil immersed heat dissipation structure adapts to long-term full-load continuous operation of substations.
3.2 Heavy Industrial Enterprise Power Supply
It is the core power transformation equipment for metallurgical plants, chemical parks, mining bases, machinery manufacturing factories and other heavy industrial scenarios. Large industrial equipment requires stable 440V three-phase power for operation, while factory office areas, living facilities and auxiliary equipment use 220V power. This multi-output oil immersed transformer can simultaneously supply power for industrial production and factory supporting facilities. Its strong overload resistance and stable high-voltage conversion performance can cope with frequent load fluctuations and long-term high-load operation in industrial production.
3.3 New Energy Power Station Grid Connection
In large-scale wind farms, centralized photovoltaic power stations and energy storage power station projects, this 69KV grade oil immersed electric transformer plays an important role in grid-connected power conversion and voltage matching. The electric energy generated by new energy units is converted into 50KV medium voltage through the transformer for grid-connected transmission, and the residual electric energy can be converted into 440V and 220V voltage for self-use of power station equipment and on-site living facilities. The equipment has strong anti-interference ability, which can adapt to the unstable power output characteristics of new energy and optimize grid-connected power quality.
3.4 Municipal and Rural Power Grid Reconstruction
In rural grid upgrading, urban community power expansion and remote area power supply projects, this multi-voltage output transformer shows excellent applicability. The 220V output fully meets household daily power consumption needs of residents, the 440V output supports small and medium-sized rural processing equipment and municipal engineering equipment, and the 50KV medium voltage realizes power transmission between regional grid nodes. The fully sealed outdoor structure adapts to complex outdoor environments such as rural open-air substations and suburban power distribution stations, with low failure rate and high power supply stability.
4. Product Features
4.2 Multi-Voltage Integrated Output, Wide Compatibility
Different from conventional single-output transformers, this three-phase oil immersed electric transformer adopts an integrated multi-voltage design, with 69KV high-voltage input, and supports synchronous output of 50KV medium voltage, 440V industrial voltage and 220V civilian voltage. It covers the full voltage range of regional power transmission, industrial production and residential power supply, realizing multi-purpose of one equipment. The voltage conversion precision is high, the output fluctuation is small, and it is compatible with most domestic and foreign power grid standards and terminal electrical equipment, with extremely high practical value and universality.
4.2 Low Loss Energy-Saving Design, High Operational Efficiency
Equipped with high-performance low-loss silicon steel core and high-conductivity pure 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 69KV grade transformers, the overall operating energy consumption is significantly reduced, and the power transmission efficiency is greatly improved. It can maintain low-energy stable operation for a long time under full load and variable load conditions, effectively reducing long-term operation and power consumption costs for power grid enterprises and industrial users.
4.3 Fully Sealed Oil Immersed Structure, High 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, and effectively delays the aging of internal insulating materials. The circulating heat dissipation system of insulating oil has uniform and efficient heat dissipation, which can quickly export heat generated by high-load operation, ensuring that the equipment maintains stable working temperature and performance for a long time.
4.4 Strong Overload Resistance and Environmental Adaptability
This 69KV input multi-output transformer has excellent short-term overload capacity and voltage impact resistance, which can cope with instantaneous load surge in peak power consumption periods without overheating tripping or voltage instability. The outer shell is treated with anti-corrosion, rust-proof and weather-resistant coating, which can operate stably in high temperature, low temperature, humid, dusty and other harsh environments. It is suitable for outdoor substations, industrial workshops, field new energy power stations and other complex installation scenarios, with strong environmental tolerance.
4.5 Low Noise Operation and Low Maintenance Cost
Through optimized core lamination process and winding vibration damping design, the electromagnetic vibration and operating noise of the equipment are effectively suppressed, realizing low-noise operation without interfering with the surrounding production and living environment. The fully sealed maintenance-free structure eliminates the need for frequent oil replacement and internal maintenance. Users only need regular external inspection, which greatly reduces later operation and maintenance manpower and material costs, with excellent long-term economic benefits.
5. Frequently Asked Questions (FAQ)
5.1 What are the differences and usage scenarios of the 50KV, 440V and 220V multiple outputs?
The three output voltages correspond to different power demand scenarios respectively. The 50KV medium-voltage output is mainly used for inter-station power transmission and long-distance secondary power distribution of regional power grids, reducing line transmission loss. The 440V three-phase output is dedicated to all kinds of industrial mechanical equipment, processing production lines and municipal engineering power equipment. The 220V low-voltage output is applied to residential household power supply, commercial office equipment and daily lighting power consumption. The integrated multi-output design realizes one machine covering transmission, industrial and civilian power supply, which greatly saves project investment space and cost.
5.2 Is this 69KV input oil immersed transformer suitable for long-term outdoor unattended operation?
Yes, it is very suitable for long-term outdoor unattended working conditions. This three-phase oil immersed electric transformer adopts a fully sealed integral oil tank structure, which can effectively isolate external moisture, dust and corrosive gases, preventing insulating oil deterioration and internal insulation aging. With professional weather-resistant and anti-corrosion treatment, it can resist extreme temperature changes and severe weather erosion. Under rated load conditions, it can operate continuously and stably for a long time without manual frequent maintenance, only needing regular routine inspection, which is very suitable for outdoor substations and remote power supply stations.
5.3 What are the core advantages of this multi-voltage transformer compared with traditional single-voltage transformers?
Traditional single-voltage transformers can only realize single-grade voltage conversion, and multiple sets of equipment are required to complete graded power transmission and distribution, resulting in high investment cost and large floor space. This 69KV input multi-output oil immersed transformer integrates 50KV power transmission, 440V industrial power supply and 220V civilian power supply functions, with flexible and diverse application scenarios. In addition, it has lower operating loss, stronger overload resistance and higher overall stability. It can meet the comprehensive power demand of power grid transmission, industrial production and residential power supply at the same time, with higher cost performance and practicability.
