Three Phase 3000 kVA Medium Voltage Power Transformer
35 kV / 33 kV / 13.8 kV Primary to 13.8 kV / 11 kV Secondary | Oil-Immersed | ANSI & IEC
Reliable Medium Voltage Power Transformer for Utility & Industrial Systems
The 3000 kVA three phase medium voltage power transformer is designed for utility substations, industrial power distribution, and large-scale infrastructure projects requiring stable, efficient, and long-term electrical performance. This medium voltage electric power transformer provides reliable voltage transformation from 35 kV, 33 kV, or 13.8 kV primary networks to 13.8 kV or 11 kV secondary systems, ensuring safe and continuous power delivery in demanding operating environments.
Manufactured as an oil-immersed power transformer, the 3000 kVA unit is engineered to meet ANSI, IEEE, and IEC standards, making it suitable for both North American utility grids and international power systems. With robust insulation design, optimized magnetic core structure, and advanced cooling performance, this three phase power transformer is ideal for long-duration operation under heavy electrical loads.
Technical Specifications
| Parameter | Specification |
| Power Rating | 750 kVA (Customizable: 100 kVA–10,000 kVA) |
| Transformer Type | Three Phase Oil-Filled / Oil-Immersed Distribution Transformer |
| Primary Voltage | 13.8 kV / 13.2 kV / 12.47 kV (Optional: up to 35 kV) |
| Secondary Voltage | 480Y/277 V or 208Y/120 V (Custom Configurations Available) |
| Connection | Delta–Wye or Wye–Wye, configurable for specific applications |
| Frequency | 50 / 60 Hz |
| Cooling | ONAN (Oil Natural Air Natural), oil-immersed |
| Standards | ANSI, IEEE, IEC, DOE Efficiency |
| Certifications | UL, cUL, CSA, CE (Optional) |
| Insulation Class | Class A / Class B (Optional) |
| Enclosure | Outdoor pad-mounted steel tank, tamper-resistant |
| Applications | Utility distribution, industrial, commercial, residential power networks, renewable energy |
Key Features of the 3000 kVA Medium Voltage Power Transformer
Utility-Grade Reliability
This 3000 kVA medium voltage power transformer is designed for continuous-duty operation in utility and industrial environments. High-quality silicon steel cores and precision-wound copper conductors minimize losses and enhance long-term system reliability.
Optimized Oil-Immersed Cooling
The oil-filled cooling system ensures excellent heat dissipation, stable temperature rise control, and extended service life. This makes the transformer suitable for high-load substations and industrial power systems.
ANSI & IEC Dual Compliance
As a globally supplied medium voltage power transformer, this model fully complies with ANSI and IEC standards, simplifying approval for utility companies, EPC contractors, and international projects.
Flexible Voltage & Capacity Design
The transformer supports multiple voltage combinations and is available in customized configurations to match existing medium voltage distribution networks.
Typical Applications
Utility Substations & Power Distribution
Designed for medium voltage utility substations and regional power distribution networks, this transformer is widely used in grid reinforcement projects, urban and rural electrification, and public utility systems. It supports stable voltage regulation, reliable load handling, and long-term operation in modern power grids.
Industrial Power Systems
Suitable for manufacturing plants, steel mills, mining operations, oil & gas facilities, and heavy industrial sites requiring continuous and high-capacity power supply. The transformer ensures dependable performance under fluctuating loads and harsh operating conditions.
Infrastructure Projects
Commonly applied in airports, railway systems, ports, data-intensive infrastructure, and public facilities, where reliable medium voltage power distribution is essential for mission-critical operations and large-scale electrical networks.
Energy & Renewable Integration
Ideal for power plants, renewable energy substations, and grid-connected wind and solar projects, enabling efficient power transmission, system stability, and seamless integration into existing medium voltage networks.
Project Case Study – 3000 kVA Utility Substation Transformer
Medium Voltage Substation Upgrade Project
Location: South America (Brazil & Argentina)
Transformer Supplied: 3000 kVA Three Phase Medium Voltage Power Transformer
Primary Voltage: 35 kV / 33 kV
Secondary Voltage: 13.8 kV
Cooling: ONAN oil-immersed
Standards: ANSI / IEC
Project Overview
A regional utility operator required a high-capacity medium voltage power transformer to replace aging substation equipment and support growing industrial electricity demand. The project required a 3000 kVA three phase power transformer with high efficiency, low losses, and compatibility with existing 35 kV infrastructure.
PowerNex Solution
PowerNex supplied customized 3000 kVA oil-immersed power transformers, designed with optimized impedance, reinforced insulation, and enhanced cooling performance. Each transformer underwent routine and type testing before shipment.
Results
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Stable medium voltage power distribution
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Reduced system losses and improved efficiency
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Reliable performance under peak industrial loads
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Long-term operational stability for utility networks
This project demonstrates the proven performance of PowerNex medium voltage power transformers in real-world utility applications.
Manufacturing Excellence & Quality Control
PowerNex is a China-based leading manufacturer and factory of medium voltage power transformers, equipped with advanced production lines, automated winding machines, vacuum drying systems, and full-capacity testing facilities. Every three phase power transformer is manufactured under strict quality control procedures to ensure consistent performance and compliance with international standards.
Engineering & R&D Capability
Our in-house engineering and R&D teams specialize in medium voltage transformer design, focusing on efficiency optimization, insulation systems, thermal performance, and grid compatibility. We provide customized solutions for high-altitude regions, high-temperature environments, special impedance requirements, and complex grid conditions.
Custom Manufacturing & Capacity Range
In addition to the 3000 kVA medium voltage power transformer, PowerNex manufactures a full range of three phase oil-immersed power transformers, including:
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500 kVA / 750 kVA / 1000 kVA / 1500 kVA
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2000 kVA / 2500 kVA / 3000 kVA / 4000 kVA
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5000 kVA / 6300 kVA / 8000 kVA / 10,000 kVA
Voltage Class: Up to 35 kV
Supply Type: Factory direct, wholesale, OEM, and project-based manufacturing
This broad capacity coverage supports internal SEO linking and scalable procurement for utilities and EPC contractors.
Contact PowerNex – Manufacturer Direct Supply
If you are sourcing a 3000 kVA three phase medium voltage power transformer, or looking for customized oil-immersed power transformers up to 35 kV, PowerNex offers comprehensive manufacturing and supply solutions tailored to utility, industrial, and infrastructure projects worldwide.
As a China-based leading transformer manufacturer and factory, we supply a full range of three phase medium voltage power transformers, including 500 kVA, 750 kVA, 1000 kVA, 1500 kVA, 2000 kVA, 2500 kVA, 3000 kVA, 4000 kVA, 5000 kVA, 6300 kVA, 8000 kVA, and up to 10,000 kVA, with primary voltages up to 35 kV. Custom voltage combinations, impedance values, vector groups, insulation systems, and cooling methods can all be engineered to match your project requirements.
PowerNex provides complete technical and commercial support, including:
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Detailed technical datasheets, GA drawings, and schematic diagrams
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Professional engineering consultation and application-specific customization
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Factory-direct pricing, wholesale supply, and long-term procurement support
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OEM / ODM manufacturing for distributors, utilities, and EPC contractors
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Reliable global logistics, export packaging, and documentation support
Our medium voltage power transformers are widely supplied to United States, Canada, Brazil, Argentina, Australia, Mexico, Saudi Arabia, UAE, Southeast Asia, Europe, and other global markets, supporting utility substations, industrial power systems, renewable energy projects, and infrastructure developments.
PowerNex is your trusted global partner for medium voltage power transformers, combining advanced manufacturing capability, experienced engineering teams, and stable international supply.
📩 Contact PowerNex today to receive technical documentation, engineering support, competitive quotations, and delivery schedules for your transformer project.
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