The 5000 kVA three-phase oil-immersed trasformatore di sottostazione is a high-capacity power distribution solution specifically engineered for medium- and high-voltage utility grids, industrial substations, and large-scale infrastructure power systems. Designed to operate reliably within voltage classes from 11 kV up to 35 kV, this transformer plays a critical role in step-down and distribution substations across global power networks.
Its oil-immersed insulation system, reinforced core structure, and three-phase balanced design ensure stable electrical performance, efficient heat dissipation, and long-term operational reliability. The transformer is suitable for continuous-duty operation under heavy electrical loads, making it ideal for utility substations, industrial plants, mining operations, renewable energy integration, and national infrastructure projects.
With customizable ratings from several hundred kVA up to 10,000 kVA, the 5000 kVA model represents a widely adopted capacity class for regional substations and industrial power hubs worldwide.
5000 kVA Substation Transformer Technical Specifications and Electrical Parameters
| Parametro | Specifiche |
|---|---|
| Capacità nominale | 5000 kVA (customizable range 500–40,000 kVA) |
| Tensione primaria | 11 kV, 13.8 kV, 15 kV, 20 kV, 33 kV, up to 35 kV |
| Tensione secondaria | 400 V, 480 V, 690 V, or project-specific |
| Tipo di trasformatore | Three-phase oil-immersed substation transformer |
| Metodo di raffreddamento | ONAN standard, optional ONAF / OFAF |
| Frequenza | 50 Hz / 60 Hz |
| Gruppo Vector | Dyn11, Yyn0, or customized |
| Materiale di avvolgimento | Copper or aluminum |
| Cambiatore di rubinetto | Off-circuit standard, optional OLTC |
| Isolamento | Mineral oil with conservator |
| Installazione | Indoor or outdoor substation |
| Standard | IEC, ANSI, IEEE, GB/T |
5000 kVA Transformer Specification for Grid, Industrial, and Infrastructure Projects
From an engineering perspective, the 5000 kVA transformer specification is optimized for high short-circuit strength, low losses, and excellent thermal stability. Its laminated grain-oriented silicon steel core minimizes hysteresis losses, while precision-wound coils ensure uniform electrical stress distribution.
Key specification highlights include:
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Designed for medium-voltage grids up to 35 kV
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High overload tolerance for peak-demand periods
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Reduced no-load and load losses for energy efficiency
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Flexible vector group options for grid interconnection
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Compatibility with protection relays and monitoring systems
These specifications allow seamless integration into utility substations, industrial power distribution networks, and infrastructure electrical systems.
5000 kVA Transformer Dimensions and Installation Considerations
Typical 5000 kVA transformer dimensions vary depending on voltage rating, cooling method, and accessory configuration. Overall footprint and height are optimized to fit standard substation layouts while allowing sufficient clearance for cooling, inspection, and maintenance.
Installation considerations include:
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Reinforced concrete foundation design
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Oil containment and drainage systems
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Adequate ventilation for ONAN or ONAF cooling
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Safe clearance for high-voltage bushings
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Accessibility for tap changer operation and oil sampling
Detailed dimension drawings are provided during project engineering to support site planning and civil design.
5000 kVA Transformer Weight and Transportation Planning
The typical weight of a 5000 kVA oil-immersed substation transformer ranges from 12 to 20 metric tons, depending on configuration. Voltage class, winding material, cooling system, and accessory selection directly affect total weight.
Key structural features supporting safe transportation include:
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Heavy-duty steel tank construction
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Integrated lifting lugs and jacking points
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Removable radiators for transport optimization
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Shock-resistant internal bracing
Accurate transformer weight data is essential for logistics planning, crane selection, and on-site handling.
5000 kVA Transformer Price Factors and Procurement Strategy
The price of a 5000 kVA transformer is influenced by multiple technical and commercial variables rather than capacity alone.
Primary pricing factors include:
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Voltage level (11 kV vs 33–35 kV class)
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Copper versus aluminum windings
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Cooling system configuration
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Standards compliance (IEC, ANSI, IEEE)
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Quantity and delivery schedule
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Optional monitoring and protection devices
For utilities, EPC contractors, and industrial buyers, factory-direct procurement and wholesale ordering provide cost advantages, transparent pricing, and flexible customization options.
5000 kVA Transformer Factory Manufacturing Process
As a high-capacity power transformer, the 5000 kVA unit is produced under controlled factory conditions following standardized manufacturing workflows:
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Core cutting and stacking with precision alignment
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Coil winding, insulation layering, and drying
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Vacuum oil filling to remove moisture and air
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Assembly of tank, conservator, bushings, and accessories
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Routine, type, and special electrical testing
Factory-based manufacturing ensures consistency, traceability, and compliance with international quality standards.
Typical Project Case Scenarios Using 5000 kVA Substation Transformers
In a regional utility expansion project, multiple 5000 kVA oil-immersed substation transformers were deployed to upgrade a medium-voltage distribution network supplying industrial zones and residential districts. Operating at 33 kV primary voltage, the transformers stepped down power to low-voltage distribution panels while maintaining high reliability during peak demand.
In an industrial manufacturing complex, a 5000 kVA transformer served as the main incoming power unit, supporting continuous production lines, heavy machinery, and auxiliary systems. The oil-immersed design ensured stable operation under fluctuating loads and high ambient temperatures.
Such case scenarios demonstrate how 5000 kVA transformers are commonly used as core assets in both utility and industrial power systems worldwide.
Operation, Maintenance, and Service Life
Proper operation and routine maintenance significantly extend transformer service life, often exceeding 25–30 years.
Recommended practices include:
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Periodic oil sampling and dielectric testing
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Visual inspection of bushings, radiators, and seals
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Temperature and load monitoring
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Breather and conservator maintenance
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Scheduled electrical testing during outages
These practices help ensure long-term reliability and minimize unplanned downtime.
Global Supply Capability and Export Readiness
The 5000 kVA three-phase oil-immersed substation transformer is widely supplied to North America, South America, Europe, Southeast Asia, the Middle East, and Africa. Export-ready packaging, compliance documentation, and logistics coordination support international project delivery.
Global customers benefit from consistent product standards, flexible configuration, and scalable supply for multi-unit substation projects.
Long-Term Value for Utility and Industrial Power Systems
Selecting a 5000 kVA oil-immersed substation transformer is a strategic investment in grid stability, energy efficiency, and system scalability. Its high-capacity design, flexible voltage range, and proven oil-immersed technology make it a dependable solution for evolving power demands.
Whether used in utility substations, industrial power hubs, or national infrastructure networks, this transformer delivers reliable performance, long service life, and adaptability to diverse operating environments. For large-scale power distribution projects requiring factory-direct supply, wholesale procurement, and global delivery, the 5000 kVA oil-immersed substation transformer remains a trusted and widely adopted choice — Trasformatore Yawei.
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