The 4000 kVA oil immersed power transformer is a core medium-voltage power solution engineered for electrical substations, utility grid infrastructure, and industrial power systems requiring long-term stability, high efficiency, and operational safety. As global demand for reliable electricity continues to grow, this capacity class has become one of the most widely adopted transformer ratings for medium-voltage distribution networks and industrial power applications.
Designed for 11–35 kV voltage systems, the 4000 kVA oil immersed power transformer is extensively deployed in utility substations, industrial facilities, infrastructure projects, and renewable energy grids across North America, South America, Europe, the Middle East, Africa, and Asia-Pacific markets. Its oil-filled insulation structure, robust mechanical design, and flexible configuration options make it suitable for both new power installations and grid modernization projects.
Technical Parameters of 4000 kVA Oil Immersed Power Transformer
| Parameter | Specification |
|---|---|
| Power Rating | 4000 kVA (capacity range available: 2000 kVA, 2500 kVA, 3150 kVA, 4000 kVA, 5000 kVA, up to multi-MVA solutions) |
| Transformer Type | Three Phase Oil Immersed Medium Voltage Power Transformer |
| Primary Voltage | 11 kV, 12.47 kV, 13.2 kV, 13.8 kV, 22 kV, 24.9 kV, 33 kV, 35 kV (custom voltages available) |
| Secondary Voltage | 400 V, 415 V, 480 V, 480Y/277 V, 400Y/230 V, or customized |
| Frequency | 50 Hz / 60 Hz |
| Connection Type | Delta–Wye (Δ–Y), Wye–Wye (Y–Y), or customized |
| Cooling Method | ONAN (standard), ONAF (optional) |
| Insulation Class | Mineral oil or optional environmentally friendly insulating oil |
| Tap Changer | Off-circuit tap changer (standard), On-load tap changer (optional) |
| Standards | IEC, IEEE, ANSI |
| Certifications | UL, cUL, CSA, CE (optional, market-dependent) |
| Installation | Outdoor substation-mounted or pad-mounted |
| Tank Structure | Sealed welded steel tank with corrosion protection |
| Applications | Electrical substations, utility grids, industrial power systems, renewable energy plants, infrastructure projects |
| Manufacturer | Factory-direct supply with OEM & customization support |
Design Philosophy and Oil-Immersed Technology
The 4000 kVA oil immersed power transformer adopts a time-tested oil-filled insulation system that delivers superior dielectric strength and thermal performance. Compared with dry-type transformers, oil immersed designs provide better heat dissipation and overload capability, making them particularly suitable for utility grids and industrial power systems with continuous or fluctuating loads.
Transformer oil acts both as an insulating medium and a cooling agent, ensuring stable operation even under high ambient temperatures or demanding electrical conditions. This design philosophy allows the 4000 kVA oil immersed power transformer to operate reliably for decades with proper maintenance.
Medium Voltage Performance for Electrical Substations
In electrical substations, the 4000 kVA oil immersed power transformer serves as a critical link between medium-voltage transmission lines and low-voltage distribution networks. Its 11–35 kV primary voltage compatibility allows seamless integration into regional grid architectures used by utility companies worldwide.
The transformer is engineered to handle voltage fluctuations, load variations, and transient conditions commonly encountered in substation environments. This makes it ideal for utility substations supplying residential zones, commercial districts, industrial parks, and public infrastructure.
Utility Grid Applications and Network Expansion
Utility grid operators rely on the 4000 kVA oil immersed power transformer for grid reinforcement, capacity expansion, and network reliability improvement. Its standardized design combined with flexible voltage options enables utilities to deploy the transformer across multiple substations with minimal adaptation.
As power demand increases due to urbanization, electrification, and renewable energy integration, this transformer rating provides an optimal balance between capacity, efficiency, and cost. It supports stable medium-voltage distribution while allowing future scalability through parallel operation or capacity upgrades.
Industrial Power Systems and Heavy-Duty Applications
Industrial facilities often require dedicated power systems capable of supporting heavy machinery, production lines, and continuous operations. The 4000 kVA oil immersed power transformer is widely used in industrial power systems for manufacturing plants, mining operations, petrochemical facilities, and processing industries.
Its high short-circuit withstand capability, low losses, and robust insulation system ensure uninterrupted power supply and equipment protection in demanding industrial environments.
Custom Voltage and Capacity Solutions
Recognizing that power system requirements vary by project and region, the 4000 kVA oil immersed power transformer supports extensive customization. Voltage ratios, secondary voltage levels, tap changer configurations, cooling methods, and insulation options can all be tailored to specific grid conditions or industrial requirements.
In addition to the 4000 kVA rating, the same platform supports capacities such as 2000 kVA, 2500 kVA, 3000 kVA, 5000 kVA,10MVA, and scalable MVA-class solutions, enabling customers to standardize equipment across multiple projects while accommodating different load demands.
Manufacturing Process and Quality Control
Each 4000 kVA oil immersed power transformer is manufactured using high-grade silicon steel cores to reduce no-load losses and improve energy efficiency. Precision-wound copper or aluminum conductors ensure optimal current-carrying capacity and mechanical strength.
Strict quality control procedures are applied throughout the manufacturing process, including core assembly, winding, insulation drying, oil filling, and final testing. Routine and type tests are conducted in accordance with IEC and IEEE standards to verify electrical performance and safety.
International Standards and Global Certifications
To support international deployment, the 4000 kVA oil immersed power transformer complies with major global standards such as IEC, IEEE, and ANSI. Optional certifications including UL, CSA, and CE are available to meet regulatory requirements in different regions.
This compliance ensures that the transformer can be confidently specified in utility tenders, EPC projects, and industrial procurement processes worldwide.
Global Supply, Wholesale, and Factory-Direct Advantages
Supplied directly from factory production, the 4000 kVA oil immersed power transformer offers competitive pricing, stable delivery schedules, and consistent quality. Factory-direct wholesale supply is ideal for utilities, EPC contractors, and industrial buyers managing large-scale or long-term power projects.
Major export markets include the United States, Canada, Australia, Brazil, Argentina, Mexico, Guyana, Malaysia, Indonesia, Saudi Arabia, the United Arab Emirates, the United Kingdom, Germany, France, Spain, Italy, South Africa, and other global regions.
Long-Term Reliability and Lifecycle Value
Investing in a 4000 kVA oil immersed power transformer provides long-term operational value through high efficiency, low maintenance requirements, and extended service life. Its durable construction and proven oil-immersed technology reduce total cost of ownership while ensuring reliable power delivery.
This transformer is a strategic asset for utilities and industrial users seeking dependable medium-voltage power solutions for present and future energy needs.
Manufactured by PowerNex
Applications Across Global Power Distribution & Transmission Projects
The 4000 kVA oil immersed power transformer is extensively applied in a wide range of power distribution and transmission projects worldwide. Its balanced capacity makes it suitable for both medium-scale substations and high-demand industrial power systems where stability and scalability are essential.
Typical application scenarios include urban electrical substations, rural grid expansion projects, industrial parks, mining operations, data centers, commercial complexes, and renewable energy integration points such as solar farms and wind power substations. In many regions, the 4000 kVA oil immersed power transformer serves as a standard unit for medium-voltage distribution due to its proven reliability and cost-effectiveness.
Performance Advantages in Harsh Operating Environments
Designed for outdoor installation, the 4000 kVA oil immersed power transformer performs reliably in harsh environmental conditions, including high humidity, high ambient temperatures, coastal salt spray, and dusty industrial zones.
The sealed steel tank structure, combined with advanced surface treatment and corrosion-resistant coatings, ensures long-term protection against environmental degradation. This makes the transformer particularly suitable for coastal regions, tropical climates, deserts, and heavy industrial areas where environmental stress is a key concern.
Energy Efficiency and Loss Optimization
Energy efficiency is a critical factor for utilities and industrial operators seeking to reduce operating costs and meet regulatory requirements. The 4000 kVA oil immersed power transformer is engineered with low-loss silicon steel cores and optimized winding design to minimize both no-load losses and load losses.
By reducing electrical losses, this transformer contributes to lower energy consumption over its operational lifetime, helping customers achieve improved grid efficiency and reduced carbon footprint. This efficiency advantage becomes increasingly significant in long-term utility and industrial power projects.
Compatibility with Renewable Energy Systems
As renewable energy continues to expand globally, the 4000 kVA oil immersed power transformer plays a vital role in integrating renewable generation into existing grids. It is commonly used in solar photovoltaic substations, wind power collection systems, and hybrid energy projects where medium-voltage step-up or step-down transformation is required.
The transformer’s stable voltage regulation and flexible tap changer options allow it to accommodate variable power inputs typical of renewable energy sources, ensuring smooth and reliable power transmission to the grid.
Safety, Protection, and Operational Reliability
Safety is a fundamental design priority for the 4000 kVA oil immersed power transformer. The transformer incorporates multiple protection features, including pressure relief devices, oil level indicators, temperature monitoring points, and optional protection relays.
These features help prevent abnormal operating conditions and allow early detection of potential issues, reducing the risk of downtime and extending the service life of the transformer. For utility grids and industrial power systems, this level of protection translates directly into operational reliability and reduced maintenance risk.
Installation Flexibility and Grid Integration
The 4000 kVA oil immersed power transformer is designed for flexible installation in both new and existing electrical substations. It can be integrated into utility grid systems with minimal modification, supporting fast deployment and reduced installation time.
Pad-mounted and substation-mounted configurations allow adaptation to different site layouts and space constraints. This flexibility is especially valuable for grid upgrade projects where space availability and construction timelines are limited.
Custom Manufacturing and Engineering Support
Every power system project has unique technical requirements. The 4000 kVA oil immersed power transformer can be fully customized to meet specific voltage ratios, impedance levels, insulation requirements, and environmental conditions.
Custom engineering options include special secondary voltages, enhanced cooling systems, on-load tap changers, noise reduction design, and environmentally friendly insulating oils. This level of customization ensures optimal compatibility with local grid standards and project specifications.
Factory Testing and Quality Assurance
Before delivery, each 4000 kVA oil immersed power transformer undergoes comprehensive factory testing to ensure compliance with IEC, IEEE, and ANSI standards. Routine tests include winding resistance measurement, ratio testing, insulation resistance testing, applied voltage tests, and no-load and load loss verification.
Optional type tests and third-party inspections can be arranged upon request, providing additional assurance for large-scale utility and infrastructure projects. This rigorous testing process ensures consistent product quality and reliable field performance.
Global Logistics and Delivery Capability
The 4000 kVA oil immersed power transformer is supplied with export-ready packaging and logistics solutions designed for international shipping. The transformer can be delivered by sea, rail, or road transport to major global markets, including North America, South America, Europe, the Middle East, Africa, and Asia-Pacific.
Professional logistics coordination ensures secure transportation, proper handling, and timely delivery to project sites worldwide.
Cost Efficiency and Wholesale Supply Advantage
Factory-direct wholesale supply of the 4000 kVA oil immersed power transformer provides customers with competitive pricing without compromising quality. This cost advantage is particularly beneficial for utility companies, EPC contractors, and industrial clients managing multiple substations or large-scale infrastructure projects.
By sourcing directly from the manufacturer, customers gain access to consistent quality, flexible customization, and long-term technical support.
Why Choose a 4000 kVA Oil Immersed Power Transformer
The 4000 kVA oil immersed power transformer offers an optimal balance between capacity, efficiency, and investment cost. It is large enough to support demanding power loads while remaining flexible enough for a wide range of applications.
Its proven oil-immersed design, global standards compliance, and adaptability to different voltage systems make it a preferred choice for utilities and industrial operators worldwide.
Long-Term Service Life and Maintenance Benefits
With proper operation and routine inspection, the 4000 kVA oil immersed power transformer delivers decades of reliable service. Oil-immersed technology allows effective heat dissipation and insulation stability, reducing aging stress on internal components.
This long service life lowers replacement frequency and minimizes lifecycle costs, making the transformer a sustainable investment for long-term power infrastructure planning.
Ideal Solution for Medium-Voltage Power Infrastructure
From electrical substations and utility grids to industrial power systems and renewable energy projects, the 4000 kVA oil immersed power transformer remains a cornerstone of medium-voltage power infrastructure.
Its adaptability, efficiency, and durability ensure dependable power transformation across diverse applications and geographic regions.
Manufacturer Expertise and Brand Strength
Manufactured by PowerNex, the 4000 kVA oil immersed power transformer benefits from extensive engineering expertise, advanced production facilities, and a strong global supply network. PowerNex specializes in medium- and high-voltage transformer manufacturing, offering OEM, custom, and wholesale solutions for utility and industrial markets worldwide.
With a focus on quality, compliance, and customer support, PowerNex delivers reliable transformer solutions tailored to global power system requirements.
Conclusion: A Reliable Choice for Global Power Projects
The 4000 kVA oil immersed power transformer for electrical substation, utility grid, and industrial power systems (11–35 kV voltage range) is a proven, high-performance solution for modern power distribution and transmission needs.
Its robust construction, flexible configuration, global certifications, and factory-direct supply make it an ideal choice for utilities, EPC contractors, and industrial power users seeking long-term reliability and cost efficiency.
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