25 KVA 37.5KVA 13.8kv Transformer Single Phase Oil Immersed Electrical Power Transformer
1. Product Overview
This professional 13.8kv single phase oil immersed electrical power transformer is available in two mainstream rated capacities of 25KVA and 37.5KVA, which is a high-performance medium-voltage power conversion equipment designed and manufactured in strict accordance with IEC 60076 and ANSI/IEEE C57.12.00 international industry standards. Adopting mature oil-immersed cooling technology and single-phase voltage conversion design, this power transformer realizes stable step-down and step-up conversion of 13.8kV medium voltage, and is widely used in outdoor and indoor single-phase power distribution systems. As a core equipment for medium-voltage single-phase power supply, the 25KVA and 37.5KVA 13.8kV single phase oil immersed transformer features compact structure, strong environmental adaptability and ultra-long service life, effectively solving the power demand of scattered small and medium power loads in medium-voltage power grids.
The equipment adopts ONAN (natural oil natural air) cooling mode, with high-purity mineral insulating oil as the heat dissipation and insulating medium. It supports 50/60Hz dual-frequency operation, and can be equipped with copper or aluminum windings according to user needs. The sealed oil tank structure prevents external dust, moisture and corrosive substances from entering, ensuring continuous and stable operation in complex outdoor environments. Different from three-phase transformers, this single-phase oil immersed power transformer is more targeted for single-phase load scenarios, with lower no-load loss and higher operation efficiency, becoming the preferred power distribution equipment for rural power grids, remote area power supply and small commercial power systems.
2. Core Product Features
2.1 Excellent Insulation and Heat Dissipation Performance
The oil immersed single phase transformer uses high-quality insulating oil and high-grade iron core materials, with excellent electrical insulation performance, which can effectively withstand the 13.8kV medium-voltage operating environment and avoid insulation breakdown and leakage accidents. The natural oil circulation heat dissipation system realizes uniform heat dissipation of windings and iron cores, solves the heat accumulation problem during long-term full-load operation, and supports 150%-200% temporary overload operation, greatly improving the equipment's emergency power supply capacity. The fully sealed tank design isolates internal components from the external environment, preventing insulating oil aging and deterioration, and maintaining stable heat dissipation and insulation performance for a long time.
2.2 High Efficiency and Energy Saving Operation
Both 25KVA oil immersed transformer and 37.5KVA oil immersed transformer adopt optimized wound core process and low-loss silicon steel sheet materials, which greatly reduce no-load loss and load loss. The product efficiency fully meets DOE international energy-saving standards, with extremely low operating energy consumption during long-term grid operation. Compared with traditional single-phase transformers of the same specification, it can save more than 8% of electric energy loss every year, helping power grid operators and end users reduce power operation costs and realize energy-saving and emission-reduction goals.
2.3 Strong Environmental Adaptability and Durability
This 13.8kV single phase power transformer is designed for harsh outdoor working conditions, with rainproof, dustproof, anti-corrosion and lightning protection properties. It can operate stably in the temperature range of -40℃ to +45℃, adapting to extreme weather such as high temperature, heavy rain, snow and strong wind. The overall structure is firm and shock-resistant, suitable for pole-mounted and pad-mounted installation methods. The service life of the equipment can reach 25-40 years under normal operating conditions, with extremely low failure rate and maintenance frequency, reducing the later operation and maintenance cost of the power system.
2.4 Flexible Installation and Wide Compatibility
The product has a compact and lightweight overall structure, supporting diversified installation methods including utility pole mounting, ground pad mounting and underground vault installation. It is compatible with mainstream 13.8kV medium-voltage single-phase power distribution grids, and the output voltage can be customized to 120/240V, 240/480V and other common specifications. It can be matched with fuse cutouts, surge arresters and other supporting equipment to form a complete power distribution protection system, which is convenient for on-site construction, installation and later equipment upgrading and transformation.
2.5 Safe and Reliable Operation Protection
Equipped with perfect overvoltage, overcurrent and lightning surge protection functions, the 13.8KV single phase oil immersed electrical power transformer can automatically avoid equipment damage caused by grid voltage fluctuation, load sudden change and lightning strike. The sealed oil tank has pressure relief and anti-explosion design, which can safely release internal pressure when the equipment fails, avoiding safety accidents such as oil leakage and explosion. All components pass strict factory testing and aging test, with stable performance and high operation safety factor, meeting the safety operation requirements of public power grids and industrial and civilian power supply systems.
3. Core Usage
The core function of the 25KVA & 37.5KVA 13.8KV single phase oil immersed power transformer is to complete voltage conversion, power distribution and electrical isolation in single-phase medium-voltage power systems. It mainly converts 13.8kV high medium voltage into low-voltage power suitable for civilian, commercial and small industrial loads, and can also realize low-voltage to medium-voltage step-up conversion according to user needs to meet the power transmission demand of decentralized power generation equipment.
In power grid operation, this oil immersed transformer undertakes the core tasks of regional power shunting, voltage stabilization and load balancing, effectively solving the problem of unstable voltage and insufficient power supply in remote and scattered power supply areas. It provides safe, stable and standard single-phase AC power for terminal electrical equipment, ensures the normal operation of electrical equipment, and avoids equipment damage and production interruption caused by voltage mismatch and power fluctuation. At the same time, its electrical isolation performance can effectively isolate grid faults, prevent fault diffusion, and improve the overall safety and stability of the power distribution system.
4. Application Scenarios
4.1 Rural and Remote Area Power Distribution
It is the core power distribution equipment for rural single-phase power grid renovation and new rural power supply projects. The 25KVA 13.8kv single phase transformer is suitable for scattered rural households, rural agricultural irrigation equipment, rural street lamps and small rural public facilities power supply; the upgraded 37.5KVA 13.8kv single phase transformer can meet the centralized power demand of rural small processing workshops, rural breeding bases and village community service centers. It perfectly adapts to the characteristics of long power supply distance and scattered loads in rural power grids, and solves the problem of difficult power supply in remote mountainous areas and pastoral areas.
4.2 Small Commercial and Civilian Power Supply
Widely used in suburban residential communities, single-family villas, small shopping malls, convenience stores, office studios and other civilian and light commercial scenarios. The single-phase power supply mode is highly matched with the daily electricity demand of civilian loads, avoiding the energy waste caused by three-phase transformer idle operation. The oil-immersed fully sealed low-noise design will not produce noise and pollution interference to living and business environments, which is very suitable for noise-sensitive urban and suburban business and living areas.
4.3 Industrial and Special Scenario Power Supply
Suitable for light industrial production equipment, small mechanical processing workshops, food processing equipment and other single-phase industrial load power supply. In addition, it is also widely used in oilfield edge stations, communication base stations, highway monitoring stations, scenic area service facilities and off-grid microgrid systems. For decentralized industrial equipment and outdoor monitoring equipment with low power demand and scattered distribution, this 13.8kV oil immersed single-phase transformer can provide stable and sustainable power support, and adapt to long-term unattended outdoor operation scenarios.
4.4 New Energy Microgrid System
Matched with small solar photovoltaic power generation systems, wind power generation equipment and energy storage systems, it is used for voltage conversion and power distribution of off-grid new energy microgrids. It can stabilize the output voltage of new energy power generation equipment, convert the generated electric energy into usable standard voltage, and supply power for terminal loads. It is an important supporting equipment for household distributed photovoltaic power generation and regional small new energy power supply projects.
5. FAQ (Frequently Asked Questions)
5.1 What is the difference between 25KVA and 37.5KVA 13.8kV single phase oil immersed transformers in application?
The core difference between the two models lies in the rated load capacity and applicable load scale. The 25KVA oil immersed power transformer has a moderate load capacity, which is more suitable for ultra-scattered small loads such as single-family residential power supply, single agricultural irrigation pumps and single small monitoring equipment, with low no-load loss and more energy-saving operation. The 37.5KVA oil immersed power transformer has a larger bearing capacity, which can meet the power demand of multi-household centralized power supply, small processing equipment and multi-channel electrical equipment simultaneous operation. Users can select the model according to the actual total load power and future load expansion demand of the power supply area to avoid overload operation or equipment capacity waste.
5.2 Is the 13.8kV single phase oil immersed transformer suitable for indoor installation?
Yes, this series of single phase oil immersed electrical power transformers supports both outdoor and indoor installation. The fully sealed oil tank structure completely prevents insulating oil leakage, and the low-noise operation design will not cause noise pollution to the indoor environment. When installed indoors, it only needs to ensure a well-ventilated installation space, reserve a certain heat dissipation distance, and comply with local electrical safety installation specifications. It is widely used in indoor power distribution rooms of small factories, community power distribution stations and commercial buildings, and has the same stable operation performance as outdoor pole-mounted installation.
5.3 What maintenance work needs to be done for the oil immersed single phase transformer in daily use?
This 13.8kV medium-voltage single-phase oil immersed transformer has low daily maintenance requirements. Regularly check whether the equipment shell is corroded, deformed or oil-leaking, and confirm whether the terminal connection is loose or oxidized. Check the insulating oil level and oil quality every 1-2 years to ensure that the oil level is within the standard range and the insulating oil is free of deterioration and impurities. For outdoor pole-mounted equipment, regularly check the firmness of the fixing parts and the performance of supporting lightning protection and protection equipment. Under normal operating conditions, the equipment does not need frequent oil replacement and component replacement, which greatly reduces the daily operation and maintenance workload of the power system.
