1. Product Overview of 5000 kVA Oil-Immersed Medium Voltage Transformer
The 5000 kVA oil-immersed medium voltage (MV) transformer is engineered for high-capacity industrial, commercial, and utility substation power distribution around the globe. It is designed to provide reliable voltage transformation, stable performance, and energy-efficient operation for grid expansion, industrial facilities, commercial complexes, and renewable energy projects.
Built with oil-immersed cooling technology, this transformer ensures long-term operational stability, low-loss operation, and high reliability under various environmental conditions. PowerNex, a China-based leading OEM transformer manufacturer, delivers customized solutions, global supply, and professional technical support for industrial, commercial, and utility power distribution applications.
2. Technical Specifications of 5000 kVA Medium Voltage Transformer
| Specification | Details |
|---|---|
| Power Rating | 5000 kVA (Range: 10–5000 kVA) |
| Type | Oil-immersed medium voltage transformer |
| Primary Voltage | 11 kV, 12.47 kV, 13.2 kV, 13.8 kV, 22 kV, 24.9 kV, 33 kV, 35 kV |
| Secondary Voltage | 208Y/120V, 480Y/277V, 400Y/230V, 415 V |
| Connection | Three Phase Delta–Wye or Wye–Wye |
| Frequency | 50/60 Hz |
| Cooling | ONAN (Optional ONAF) |
| Insulation Class | Class A, B, F, or H (customizable) |
| Standards Compliance | ANSI, IEC, IEEE |
| Certifications | UL, cUL, CSA, CE optional |
| Mounting Type | Pad-mounted / Substation installation |
| Enclosure | Outdoor steel tank, tamper-resistant |
| Weight | 12,500–14,500 kg (depends on configuration) |
| Dimensions (L×W×H) | 5.2 × 2.5 × 3.1 m (customizable) |
| Applications | Substation, industrial, commercial, renewable energy, utility grids |
3. Structure and Design of Oil-Immersed MV Transformer
The PowerNex 5000 kVA MV transformer is engineered for high reliability and long-term operation. Key components include:
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Magnetic Core: Laminated high-grade silicon steel to reduce core loss
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Windings: High-purity copper or aluminum with high-quality insulation
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Tank & Enclosure: Corrosion-resistant steel for outdoor substation conditions
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Cooling System: ONAN oil-immersed, optional ONAF for high-load applications
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Bushings: ANSI & IEC compliant high-voltage bushings
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Protection Devices: Conservator tank, pressure relief, optional OLTC (On-Load Tap Changer)
Pad-mounted design ensures safe installation, optimal cooling, and easy maintenance.
4. Applications and Case Studies of 5000 kVA Substation Transformer
Applications:
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Utility Substations: High-capacity power distribution and grid stability
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Industrial Plants: Mining, manufacturing, petrochemical
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Commercial Complexes: Airports, hospitals, data centers, shopping centers
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Renewable Energy Projects: Solar farms, wind farms, hydroelectric stations
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Rural Electrification: Remote regions requiring reliable power
Case Studies:
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Brazil – São Paulo Substation: 5000 kVA transformer supplies industrial and residential loads with pad-mounted installation.
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Australia – Wind Farm, Victoria: Converts 33 kV from turbines to grid, ensuring renewable energy stability.
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South Africa – Industrial Park: Provides commercial and industrial complex with reliable distribution, high efficiency, and minimal downtime.
5. Installation Guidelines for Pad-Mounted Medium Voltage Transformer
Installation Steps:
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Prepare reinforced concrete foundation capable of supporting 12–15 tons
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Ensure clearances for maintenance and cooling
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Connect high-voltage and low-voltage terminals per ANSI/IEC wiring diagrams
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Perform proper grounding and bonding according to local codes
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Fill with insulating oil, test dielectric strength, and verify leak-free operation
Maintenance:
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Inspect oil condition and dielectric strength every 6–12 months
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Monitor temperature and load gauges
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Clean bushings and exterior surfaces
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Schedule annual electrical tests (turns ratio, insulation resistance, power factor)
6. Testing and Quality Assurance of Oil-Immersed Substation Transformer
Routine Tests: Winding resistance, insulation resistance, turns ratio, polarity
Type Tests: Temperature rise, short-circuit withstand, noise, dielectric strength
Acceptance Tests: Load loss, no-load loss, oil dielectric strength
Third-Party Certifications: UL, CSA, CE optional
All ensure global compliance, safe operation, and high reliability.
7. Dimensions and Weight of 5000 kVA Oil-Filled MV Transformer
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Dimensions (L×W×H): 5.2 × 2.5 × 3.1 m (customizable)
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Weight: 12,500–14,500 kg
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Tank Volume: 3,000–3,500 L
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Installation Clearance: Minimum 1 m around transformer
Custom sizes are available for specific project needs.
8. Price, Supply, and Global Distribution of 5000 kVA MV Transformer
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Price Range: USD 150,000 – 220,000 per unit (depends on configuration)
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MOQ: 1 unit for OEM orders
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Lead Time: 10–14 weeks standard, 16–20 weeks for OEM
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Global Shipping: Sea, rail, or land freight
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Warranty: 18–24 months standard, extendable
PowerNex provides factory-direct pricing and OEM customization, delivering high-quality transformers worldwide.
9. Drawings and Schematics of Medium Voltage Substation Transformer
Documentation Provided:
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ANSI/IEC wiring diagrams
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3D mechanical layouts
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Pad-mounted installation schematics
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Cooling system and oil tank schematics
Formats: PDF, DWG – suitable for EPC, industrial, and utility projects.
10. Frequently Asked Questions (FAQ) for 5000 kVA Oil-Immersed Transformer
Q1: Can this transformer support multiple primary voltages?
Yes, primary voltages range 11 kV to 35 kV.
Q2: Suitable for renewable energy projects?
Yes, widely used in solar, wind, and hydroelectric power distribution.
Q3: What cooling methods are available?
Standard ONAN oil-immersed, optional ONAF for high-load or continuous operation.
Q4: How is it installed?
Pad-mounted installation is recommended for stability, safety, and maintenance.
Q5: What certifications are included?
ANSI, IEC, IEEE compliance; optional UL, CSA, CE for international projects.
Q6: Can it be OEM customized?
Yes, primary/secondary voltage, cooling, impedance, insulation class, mounting configuration are all customizable.
Q7: What maintenance is required?
Regular oil inspection, temperature monitoring, and electrical testing for long-term reliability.
11. Why Choose PowerNex for Oil-Immersed Medium Voltage Transformers
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China-based leading transformer manufacturer with full industrial chain
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OEM and custom solutions for all voltage ratings and capacities
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Global supply experience in USA, Canada, Brazil, Argentina, Mexico, Venezuela, Australia, New Zealand, Indonesia, Malaysia, Philippines, UAE, Saudi Arabia, Russia, Germany, France, South Africa
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High-quality materials and rigorous factory testing
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Factory-direct, cost-effective pricing
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Professional technical support for installation, maintenance, and troubleshooting
12. Conclusion and Call to Action for 5000 kVA MV Substation Transformer
The 5000 kVA oil-immersed medium voltage power transformer from PowerNex is the ideal solution for industrial, commercial, and utility substation power distribution projects worldwide. Designed for high-capacity and reliable energy transfer, it supports primary voltages up to 35 kV and secondary voltages including 208Y/120V, 480Y/277V, 400Y/230V, with customizable configurations to meet project-specific requirements.
PowerNex offers a full range of medium voltage transformers, from 10 kVA up to 5000 kVA, with pad-mounted or substation installation, ANSI & IEC compliance, and optional certifications including UL, CSA, and CE. Our OEM customization services cover primary and secondary voltages, cooling methods, insulation class, impedance, and mounting options, ensuring tailored solutions for industrial facilities, commercial complexes, renewable energy projects, and utility networks.
With global supply, competitive wholesale pricing, and professional technical support, PowerNex enables utilities, EPC contractors, and distributors to secure reliable, high-efficiency, and long-lasting transformer solutions for projects in North America, South America, Europe, Asia-Pacific, the Middle East, and Africa.
Contact PowerNex today to request a quotation, detailed technical drawings, or OEM customization, and explore our full range of medium voltage transformers for wholesale, project supply, or turnkey solutions. Let PowerNex be your trusted partner in delivering high-quality, customizable, and globally compliant substation transformer solutions.
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