Overview / Product Introduction for Oil-Immersed Distribution Transformers
The 250kVA Oil-Immersed Distribution Transformer manufactured by Yawei Transformer is engineered for industrial, utility, and substation applications across the globe. Designed to meet the highest international standards, this transformer provides reliable and efficient power distribution for factories, industrial plants, commercial buildings, renewable energy installations, and infrastructure projects.
Supporting medium-voltage levels 6kV, 10kV, 15kV, 20kV, and high voltage up to 35kV, this transformer offers flexible configurations to accommodate a variety of power distribution needs. Its customizable capacity from 50kVA up to 10,000kVA ensures that Yawei Transformer can meet the requirements of any industrial or utility project.
Built according to IEC, ANSI, IEEE, and GB/T standards, this oil-immersed distribution transformer combines high efficiency, low loss, and long-term operational reliability. The durable design ensures safe and stable operation in demanding industrial environments and harsh outdoor conditions.
As a professional factory manufacturer and supplier, Yawei Transformer offers wholesale, OEM, and custom solutions, delivering globally to markets including USA, Canada, UK, Germany, France, Spain, Italy, Australia, Mexico, Argentina, Brazil, and worldwide. This transformer is ideal for engineers, procurement managers, and B2B customers seeking high-quality, oil-immersed distribution transformers for industrial, utility, and substation networks.
Technical Specifications / Parameters Table for 250kVA Oil-Immersed Distribution Transformers
| Parameter | Specification |
|---|---|
| Rated Capacity | 250kVA (customizable 50–10000kVA) |
| Primary Voltage | 6kV, 10kV, 15kV, 20kV, 35kV (customizable) |
| Secondary Voltage | Standard low-voltage options 230V, 400V, 480V, or project-specific |
| Transformer Type | Oil-Immersed, Three-Phase Distribution Transformer |
| Cooling Method | ONAN (Oil Natural Air Natural), optional ONAF (Oil Natural Air Forced) for high-load applications |
| Installation Type | Indoor, outdoor, substation, floor-mounted or enclosure-installed |
| Winding Configuration | Grounded Wye / Wye or Delta; other vector groups available |
| Voltage Regulation | Off-circuit tap changer standard; optional On-Load Tap Changer (OLTC) for dynamic voltage control |
| Insulation System | Mineral oil-immersed with conservator tank and breather, high dielectric strength, eco-friendly |
| Applicable Standards | IEC, ANSI, IEEE, GB/T |
| Typical Applications | Industrial plants, utility networks, substations, commercial buildings, renewable energy projects, infrastructure installations |
| Manufacturer / Supplier | Yawei Transformer – Factory direct, wholesale, OEM, custom solutions |
| Global Delivery | USA, Canada, UK, Germany, France, Spain, Italy, Australia, Mexico, Argentina, Brazil, worldwide |
Testing & Quality Assurance for Oil-Immersed Distribution Transformers
Yawei Transformer ensures that each 250kVA oil-immersed distribution transformer undergoes rigorous testing and quality control before shipment:
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Routine Electrical Tests: insulation resistance, winding resistance, voltage ratio, load loss, and no-load loss tests
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High Voltage Tests: lightning impulse test, dielectric strength test for medium and high-voltage applications
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Temperature Rise Tests: confirming operational stability under maximum load conditions
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Noise & Vibration Tests: ensuring low operational noise and minimal vibration for industrial and substation environments
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Oil Quality Tests: dielectric strength, moisture content, and chemical stability testing to guarantee transformer longevity
These comprehensive tests ensure the transformer meets international standards, delivering reliable performance for industrial and utility applications worldwide.
Materials & Components of Oil-Immersed Distribution Transformers
The 250kVA oil-immersed transformer is built with premium-quality components to ensure durability and efficiency:
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Core Material: Cold-rolled grain-oriented silicon steel for low loss and high magnetic performance
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Windings: High-purity copper or aluminum conductors with epoxy insulation for maximum reliability
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Insulation System: Mineral oil with conservator tank and silica gel breather, eco-friendly and high dielectric strength
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Tank & Structure: Heavy-duty steel tank with anti-corrosion coating, weather-resistant for outdoor installation
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Bushings & Accessories: High-voltage porcelain bushings, conservator, oil level indicator, pressure relief device, tap changer options
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Cooling System: ONAN standard, optional ONAF for high-load or high-temperature environments
Maintenance & Operation Guidelines for Oil-Immersed Distribution Transformers
Proper maintenance extends the life and efficiency of the transformer:
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Oil Level & Quality Check: Regularly monitor oil level and dielectric strength
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Visual Inspection: Check for leaks, corrosion, or damage to bushings, tank, and accessories
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Temperature Monitoring: Ensure transformer operates within rated temperature range
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Load Monitoring: Avoid prolonged overload conditions to prevent accelerated aging
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Scheduled Maintenance: Periodic inspection and cleaning, including conservator and breather maintenance
Yawei Transformer provides technical support and guidance for maintenance and operational optimization.
Shipping & Packaging Solutions for Industrial & Utility Transformers
Yawei Transformer ensures safe and reliable shipping worldwide:
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Robust Packaging: Steel frame supports, shockproof cushioning, moisture-proof wrapping
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Customs Documentation: Export-ready documentation for international shipments
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Global Delivery: Fast and secure delivery to USA, Canada, UK, Germany, France, Spain, Italy, Australia, Mexico, Argentina, Brazil, and other markets
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Bulk & Wholesale Orders: Efficient handling of multiple units for industrial or utility projects
Key Features & Benefits of 250kVA Oil-Immersed Distribution Transformers
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Medium voltage options 6kV–20kV and high voltage up to 35kV, supporting versatile applications
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Customizable capacity 50–10000kVA to meet industrial and utility power needs
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High efficiency, low loss, long-term reliability
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Wide application range: industrial plants, utility networks, substations, commercial and renewable projects
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Full range of oil-immersed distribution transformers for various B2B and global projects
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Factory direct, wholesale, OEM, and custom solutions
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Global sales coverage including USA, Canada, UK, Germany, France, Spain, Italy, Australia, Mexico, Argentina, Brazil
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Compliance with IEC, ANSI, IEEE, GB/T standards for quality and safety
Applications of Oil-Immersed Distribution Transformers
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Industrial facilities, factories, and manufacturing plants
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Utility and municipal power networks
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Substation deployment and grid distribution
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Commercial complexes and infrastructure projects
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Renewable energy distribution including solar and wind farms
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Critical infrastructure and smart grids
Project Case Studies for Oil-Immersed Distribution Transformers
Yawei Transformer’s 250kVA oil-immersed transformers have been successfully deployed in multiple international projects:
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USA Industrial Park – 10 units installed for medium-voltage distribution supporting manufacturing lines and auxiliary facilities.
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Germany Substation Network – Custom 250kVA transformers with 35kV primary voltage configured for smart grid integration.
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Brazil Renewable Energy Project – Transformers used for solar farm power distribution with ONAN cooling and outdoor installation.
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Australia Utility Network Upgrade – Multiple units installed in municipal substations, ensuring stable supply to residential and commercial areas.
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Mexico Infrastructure Project – Customized low-voltage outputs integrated for mixed-use commercial buildings.
Each project demonstrates Yawei Transformer’s capability in providing customized, high-quality, and reliable oil-immersed distribution solutions for global industrial and utility networks.
FAQ – Common Questions About 250kVA Oil-Immersed Distribution Transformers
Q1: What voltage levels are supported?
A: Primary voltage options include 6kV, 10kV, 15kV, 20kV, and 35kV; secondary voltage can be customized for 230V, 400V, 480V, or project-specific requirements.
Q2: Can the capacity be customized?
A: Yes, capacities range from 50kVA to 10,000kVA based on project requirements.
Q3: Are these transformers suitable for outdoor installations?
A: Yes, the oil-immersed design with robust tank structure supports indoor, outdoor, and substation installations.
Q4: What cooling methods are available?
A: Standard ONAN (Oil Natural Air Natural) cooling; optional ONAF (Oil Natural Air Forced) is available for high-load or high-temperature environments.
Q5: Is Yawei Transformer able to provide OEM or wholesale solutions?
A: Yes, we provide factory direct, OEM, wholesale, and custom solutions with global delivery including USA, Germany, UK, Canada, Brazil, and other markets.
Q6: What standards do these transformers comply with?
A: IEC, ANSI, IEEE, and GB/T standards for safety, reliability, and performance.
Conclusion
The 250kVA oil-immersed distribution transformer from Yawei Transformer represents a premium, high-efficiency solution for industrial, utility, and substation power networks worldwide. With flexible medium and high-voltage options, customizable capacity, robust materials, rigorous testing, and global shipping, these transformers deliver reliable, stable, and safe power distribution for any project size.
By choosing Yawei Transformer, engineers and procurement managers gain access to factory-direct supply, wholesale orders, OEM customization, and comprehensive technical support, ensuring every project is executed with efficiency, quality, and long-term reliability. Whether for industrial plants, renewable energy projects, municipal utilities, or commercial infrastructure, Yawei Transformer’s oil-immersed distribution transformers provide unmatched performance, durability, and global service.
With decades of manufacturing experience, a focus on international standards compliance, and a worldwide delivery network, Yawei Transformer is your trusted partner for all industrial and utility power distribution solutions, helping businesses achieve operational excellence and uninterrupted power supply anywhere in the world.
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