50KVA-2500KVA Oil Immersed Power Transformer
1. Product Description
The 50KVA, 100KVA, 150KVA, 200KVA, 250KVA, 300KVA, 400KVA, 450KVA, 500KVA to 2500KVA oil immersed power transformer, also widely known as oil-filled distribution transformer, is a conventional and mature power conversion equipment designed per IEC and GB industry standards for medium and low voltage power grid systems. This full-capacity series covers small, medium and large power grade specifications, fully meeting diversified power transformation demands of civil distribution, industrial production and new energy power stations.
Adopting high-quality cold-rolled oriented silicon steel sheets and high-purity copper winding wires, the whole series of oil immersed distribution transformer features integrated core and coil sealing structure. The internal components are completely immersed in high-insulation mineral transformer oil, which serves as both heat dissipation medium and insulating medium. This structural design effectively solves the heat accumulation and insulation breakdown problems of traditional transformers during long-term full-load operation. From 50KVA small household and community power distribution units to 2500KVA large industrial power supply equipment, all specifications adopt standardized production processes, with unified structural stability and operational safety, supporting 24-hour continuous and stable grid operation.
Different from dry-type transformers, this oil immersed power transformer series has stronger overload resistance and environmental adaptability. It can work stably in high temperature, humid and outdoor open-air environments for a long time, with low partial discharge rate and ultra-low operating noise. The product shell adopts anti-corrosion and rust-proof spraying process, which can resist wind, rain and ultraviolet erosion, greatly extending the overall service life of the equipment. As the most mainstream power distribution transformation equipment in the current power industry, this full-series oil-filled transformer has excellent voltage regulation performance and can adapt to fluctuating grid load changes.
2. Core Product Features
2.1 Excellent Insulation and Heat Dissipation Performance
This oil immersed power distribution transformer relies on circulating transformer oil to realize efficient heat conduction and heat dissipation. The insulating oil fully fills the gap between the iron core and windings, eliminating air voids, effectively improving the overall dielectric strength of the equipment and avoiding insulation aging and breakdown caused by long-term power-on operation. Compared with air-cooled transformers, the liquid cooling system has more uniform heat dissipation, no local overheating, and can maintain stable heat dissipation efficiency even under long-term full-load and short-term overload conditions. All specifications from 50KVA to 2500KVA are equipped with high-efficiency radiators, which accelerate oil circulation heat exchange and ensure low-temperature operation of the equipment.
2.2 High Energy Saving and Low Loss Design
The full-capacity oil immersed power transformer series optimizes the iron core lamination process and winding turns design, effectively reducing no-load loss, load loss and no-load current. The upgraded silicon steel sheet material greatly inhibits magnetic flux leakage and eddy current loss, making the equipment more energy-saving and environmentally friendly during operation. Whether it is 100KVA and 200KVA medium-sized transformers for commercial parks or 1000KVA to 2500KVA high-power transformers for industrial parks, the loss indicators are far lower than national industry standards, effectively reducing long-term power operation costs for users.
2.3 Strong Operational Stability and Durability
The equipment adopts an integral sealed tank structure with good tightness, which can effectively prevent external dust, moisture and corrosive gases from entering the interior, avoiding internal component oxidation and insulation performance degradation. The copper winding has strong conductivity and tensile resistance, not easy to deform and damage during frequent load switching. The whole series of oil immersed distribution transformers have strong overload capacity and short-circuit resistance, can withstand instantaneous grid voltage fluctuations and impact loads, and are suitable for long-term uninterrupted power supply scenarios. The normal service life can reach more than 30 years with regular maintenance.
2.4 Wide Specification Coverage and Strong Customization
The product covers complete capacity specifications including 50KVA, 100KVA, 150KVA, 200KVA, 250KVA, 300KVA, 400KVA, 450KVA, 500KVA up to 2500KVA, covering all conventional power demand ranges of civil, commercial, industrial and new energy fields. It supports customized adjustment of voltage ratio, installation mode and protection accessories according to user site conditions, and can adapt to different voltage levels and grid connection standards in various regions. The equipment is compact in structure and flexible in installation, suitable for outdoor pole-mounted, box-type substation and indoor foundation installation.
2.5 Low Noise and Environmental Protection Operation
Through optimized iron core vibration reduction design and winding fixed structure, the operating noise of the oil immersed power transformer is effectively reduced, meeting urban environmental noise standards. The insulating oil is non-toxic and pollution-free, with stable chemical properties, no deterioration and no leakage pollution in long-term use. The product has no electromagnetic radiation pollution during operation, which is friendly to the surrounding environment and personnel, and can be safely used in residential areas, schools, hospitals and other densely populated scenarios.
3. Core Purpose
The core function of the 50KVA-2500KVA oil immersed power transformer is to realize step-up and step-down conversion of grid voltage, stabilize power grid voltage output, and distribute electric energy reasonably and efficiently. As the core equipment of power distribution systems, it undertakes the key tasks of power transmission, voltage regulation and load distribution between high-voltage transmission lines and low-voltage power consumption terminals.
In municipal power grids, this series of oil-filled distribution transformers mainly convert 10kV high-voltage electricity into 0.4kV low-voltage industrial and civilian electricity, ensuring safe and compliant power consumption for terminal users. In industrial production scenarios, high-capacity models such as 1000KVA, 1600KVA, 2000KVA and 2500KVA can stabilize industrial voltage, avoid equipment damage caused by voltage fluctuations, and ensure the continuous operation of large mechanical equipment and production lines. In new energy projects, medium and small capacity specifications including 300KVA, 400KVA, 450KVA and 500KVA are used for power collection and voltage conversion of photovoltaic and wind power generation systems, realizing grid-connected power transmission of new energy power.
In addition, this oil immersed distribution transformer also has the functions of isolating grid circuits and reducing power transmission loss, effectively improving the utilization rate of electric energy and ensuring the safety, stability and efficiency of the entire power distribution system operation. It can flexibly match light-load power supply of residential communities and heavy-load power supply of industrial mines, meeting the power supply demands of different load intensities.
4. Application Scenarios
4.1 Municipal Power Grid and Civil Construction
Small and medium capacity oil immersed power transformers including 50KVA, 100KVA, 150KVA, 200KVA and 250KVA are widely used in urban and rural power grid renovation, residential communities, commercial plazas, office buildings, schools and hospitals. These scenarios have stable daily power load and high requirements for power supply safety and noise control. The low-noise and high-stability characteristics of oil immersed distribution transformers can fully meet the long-term power supply demands of civil facilities, and the outdoor anti-corrosion design adapts to urban outdoor pole-mounted and box-type substation installation environments.
4.2 Industrial Production and Mining Industry
Medium and high capacity models such as 300KVA, 400KVA, 500KVA, 800KVA, 1250KVA, 1600KVA, 2000KVA and 2500KVA are applicable to manufacturing factories, chemical plants, steel mills, mines and industrial parks. Industrial scenarios have characteristics of large power load, frequent load fluctuation and long-term full-load operation. The strong overload resistance and short-circuit resistance of oil immersed power transformers can cope with the impact of frequent start and stop of industrial mechanical equipment. The sealed and anti-corrosion structure can adapt to harsh industrial environments such as high dust and corrosive gas, ensuring continuous and stable industrial power supply.
4.3 New Energy Power Generation Projects
This full-series oil immersed distribution transformer is an important supporting equipment for photovoltaic power stations, wind power plants and energy storage power stations. Medium capacity specifications from 250KVA to 500KVA are mostly used for distributed photovoltaic power generation and small wind power projects, while high-capacity models above 1000KVA are suitable for centralized large-scale new energy power stations. It completes voltage conversion and power collection of new energy power generation, solves the problem of unstable voltage of new energy power generation, and realizes safe grid-connected power transmission, effectively improving the grid-connected efficiency of new energy power.
4.4 Infrastructure and Special Engineering Projects
The product is also widely used in railway transit, highway engineering, airport facilities, data centers and field construction projects. For temporary construction power consumption and long-term infrastructure power supply, oil immersed power transformers have the advantages of convenient installation, strong environmental adaptability and low maintenance cost. Especially in outdoor field environments without perfect environmental protection facilities, the fully sealed oil-filled structure can avoid equipment failure caused by environmental erosion, providing reliable power guarantee for infrastructure construction and operation.
5. Frequently Asked Questions (FAQ)
Q1: What is the difference between oil immersed distribution transformer and dry-type transformer, and how to choose the right capacity?
Oil immersed power transformers adopt oil-filled heat dissipation and insulation design, with lower manufacturing cost, stronger overload capacity, better heat dissipation effect and longer service life, which are more suitable for outdoor installation, industrial heavy-load and long-term continuous power supply scenarios. Dry-type transformers rely on air cooling, with higher safety in fire prevention, but higher cost and weaker overload resistance, mostly used for indoor high-fire-risk environments. In terms of capacity selection, 50KVA-500KVA small and medium specifications are preferred for civil communities and commercial scenarios; 800KVA-2500KVA high-capacity models are suitable for industrial parks, new energy power stations and large infrastructure projects. It is recommended to reserve 20%-30% surplus capacity according to the actual peak power load to avoid long-term overload operation of the equipment.
Q2: What are the common faults and daily maintenance methods of 50KVA-2500KVA oil immersed power transformers?
Common faults of oil immersed distribution transformers mainly include oil leakage, excessive operating temperature, abnormal noise, insulation aging and voltage instability, most of which are caused by long-term overload operation, poor sealing and aging insulating oil. Daily maintenance is simple and operable: regularly check the transformer oil level and oil quality, replace deteriorated insulating oil in time; clean radiator dust to ensure unobstructed heat dissipation; fasten loose shell and wiring parts regularly; detect grounding resistance and insulation performance quarterly; avoid long-term over-load and over-voltage operation. Standardized daily maintenance can effectively reduce equipment failure rate and extend the service life to more than 30 years.
Q3: What environmental and installation conditions are required for the oil immersed power transformer series?
This full-series oil immersed power transformer is suitable for outdoor and indoor conventional installation environments, with an adaptive ambient temperature range of -20℃ to +40℃, and can adapt to humid, dusty and weak corrosive environments. The installation site needs to be flat and well-drained to avoid long-term water accumulation soaking the equipment. Outdoor pole-mounted and box-type installation requires lightning protection and grounding measures to prevent lightning strike damage. Although the product has good environmental adaptability, it should avoid long-term exposure to strong corrosive gas and severe salt fog environments. For high-altitude and extreme temperature areas, we can provide customized improved models to ensure stable equipment operation.
