Oil-Immersed Transformers
These ruggedized transformers are ideal for substation yards and power distribution line-ups.
Transformer Specifications
kVA: Up to 2500kVA
Backed by years of manufacturing experience, our oil-immersed distribution transformers have supported a wide variety of power distribution projects around the world. From standard applications to customized solutions, we provide dependable transformers that meet project-specific requirements and international standards.
Voltage: Up to 35kV
Standard Features
Standards：IEC, ANSI/IEEE, NEMA, CSA
Rated Power：Up to 2500kVA
Rated Voltage：Up to 35kV
Rated Frequency：50Hz / 60Hz
Phase：Three Phase
Application：Medium Voltage Power Distribution
Cooling Method：ONAN/ONAF/OFAF
Installation：Indoor / Outdoor
Insulation Fluid：Mineral Oil, FR3, Vegetable Oil, Silicone Oil
Tank Options：Mild Steel / Stainless Steel
Corrosion Protection：>1000 Hours Salt Spray Test
Customization options
Built Around Your Exact Transformer Requirements
Every transformer can be configured to match your application, installation environment, and technical requirements. From bushings and protection devices to cooling systems and accessories, we provide the right combination for each project.
Our oil filled transformer consists of the following main components:
1.Transformer Core 2.No-Load Tap Changer
3.HV & LV Windings 4.Grounding Nut
5.Transformer Oil 6.Buchholz Relay
7.Oil Tank 8. Lifting Lugs
9.Radiator & Cooling System 10.Neutral Phase Bushing
11.High Voltage Bushings 12.Oil Level Gauge
13.Low Voltage Bushings 14.Oil Sample Valve
15.Pocket for Mercury Thermometer 16.Oil Temperature Indicator
This is the wiring diagram for the 2000kVA oil-filled distribution
transformers purchased by our Albanian client. Please feel free to
contact us directly if you would like more information about distribution transformer wiring diagrams.
Engineered for Reliable Performance in Demanding Applications
Our oil-immersed distribution transformers are designed to deliver stable performance, efficient operation, and long service life across a wide range of power distribution applications.
Low-loss
Design
Built with high-permeability grain-oriented silicon steel cores and precision winding technology, our oil-immersed distribution transformers are designed to minimize no-load and load losses, improving energy efficiency and reducing long-term operating costs.
Premium Materials & Sealed
Construction
Manufactured with high-temperature insulation materials, such as Nomex®, and a fully sealed tank design, the transformer is protected against moisture ingress, oxidation, and environmental contamination, ensuring reliable operation and an extended service life.
Corrosion-resistant
Construction
Designed for demanding outdoor environments, the transformer tank features durable protective coatings with excellent corrosion resistance, making it suitable for coastal, humid, and industrial applications.
Flexible
Customization
Customized solutions are available for different voltage classes, rated capacities, installation methods, cooling options, and environmental conditions, including high-altitude, coastal, and extreme-temperature applications.
High Short-Circuit
Withstand Capability
An optimized winding structure and reinforced mechanical design improve resistance to short-circuit forces and sudden load fluctuations, helping maintain operational stability while reducing the risk of deformation and unexpected failures.
Reliable Outdoor
Operation
Designed to withstand demanding operating conditions, our oil-immersed distribution transformers provide stable and dependable performance across utility networks, industrial facilities, and renewable energy projects.
Projects Powered by Maxevol Oil-Immersed
Maxevol Oil-Immersed transformers provide reliable power to critical projects across the Worldwide.
Get a Quote in Minutes
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Which Transformer Is Right for Your Application?
Oil-immersed and dry-type transformers each offer distinct advantages. The right choice depends on installation environment, capacity requirements, maintenance preferences, safety considerations, and project budget.
| Feature | Oil-immersed Distribution Transformer | Dry Type Transformer |
|---|---|---|
| Cooling Method | Transformer oil provides insulation and efficient heat dissipation | Air or epoxy resin insulation with natural or forced air cooling |
| Rated Capacity | Up to 2500 kVA | 50 kVA up to 20 MVA |
| Voltage Rating | Up to 35 kV | Up to 35 kV |
| Energy Efficiency | Lower operating losses and excellent thermal performance | Good efficiency, but generally lower cooling performance under heavy loads |
| Installation Environment | Outdoor substations, industrial facilities, utility networks | Indoor buildings, hospitals, schools, commercial facilities |
| Maintenance | Periodic oil inspection and maintenance required | Low routine maintenance requirements |
| Fire Safety | Requires appropriate fire protection measures | Higher fire safety due to oil-free construction |
| Initial Investment | More cost-effective for higher capacities | Higher purchase cost for equivalent capacity |
| Typical Applications | Utility grids, manufacturing plants, renewable energy, infrastructure | Commercial buildings, data centers, public facilities |
Frequently Asked Questions
Q: How do I choose the right oil cooled distribution transformer capacity for my project?
A: The required transformer capacity depends on your total connected load, expected future expansion, load characteristics, and safety margin. Our engineering team can recommend the appropriate kVA rating based on your application and local utility requirements.
Q: Can you customize oil-filled transformers for local grid standards?
A: Yes. We can customize voltage ratios, frequency, vector groups, impedance, tap changers, cooling methods, and other specifications to comply with local utility standards and project requirements.
Q: How do I choose between a single-phase and a three-phase oil-immersed transformer?
A: Single-phase oil-immersed transformers are commonly used for residential areas, rural distribution networks, and light commercial applications. Three-phase oil-immersed transformers are designed for industrial facilities, utility substations, commercial buildings, and renewable energy projects where higher power capacity and balanced loads are required.
Q: How is the price of an oil-immersed transformer determined?
A: The price depends on factors such as rated capacity, voltage class, core material, winding material, cooling method, accessories, applicable standards, and project-specific customization. Contact us with your technical requirements for a detailed quotation.
Q: Do you provide factory testing before shipment?
A: Yes. Every transformer undergoes comprehensive routine testing before delivery, including insulation resistance tests, winding resistance tests, ratio verification, dielectric tests, and functional inspections to ensure compliance with applicable standards.
