Energy Transformer designs and manufactures high quality electrical substation transformers for power transmission and distribution systems. Our product range includes oil immersed power transformers, three phase substation transformers, and high voltage transformers up to 330kV. Power capacities range from 500 kVA to 500 MVA, suitable for utility substations, industrial zones, power plants, and renewable energy integration. All transformers are produced in our advanced factory with strict quality control, and comply with international standards such as IEC, GOST, CE, and UL. We offer factory direct wholesale prices, fast delivery, and flexible custom solutions based on project requirements.
The Backbone of Power Distribution: Reliable Substation Transformers for Utilities & Industry
Substation transformers are the critical link between high-voltage transmission lines and the lower-voltage distribution networks that power our cities, homes, and businesses. As the core of any electrical substation, these transformers step down voltage to levels suitable for local consumption, ensuring stable and reliable power delivery.
At Energy Transformer, we engineer our substation transformers for exceptional performance, durability, and a long service life, meeting the rigorous demands of utility grids and large industrial operations. We offer a full range of solutions, from compact units for urban substations to massive, high-power transformers for major grid interconnections.
Need a custom substation transformer? Request a Quote or Talk to an Engineer to discuss your project requirements.
What Are Substation Transformers?
A substation transformer is a static electrical device that converts high-voltage electricity from a transmission network to lower, usable voltages for a distribution network. Unlike power transformers that primarily handle long-distance transmission, or distribution transformers that serve end-users, substation transformers act as the intermediary, ensuring a smooth transition of power within the grid infrastructure.
They are typically found in:
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Transmission Substations: Stepping down ultra-high voltages to sub-transmission levels.
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Distribution Substations: Stepping down sub-transmission voltages to primary distribution levels (e.g., 33kV to 11kV).
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Industrial Substations: Providing power to large industrial facilities like mines, factories, and petrochemical plants.
Voltage & Capacity Ranges
At Energy Transformer, we design and manufacture substation transformers to handle a wide array of voltage and power requirements, ensuring we can support any grid architecture.
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High Voltage (Primary): 33kV, 34.5kV, 35kV, 66kV, 69kV, 110kV, 132kV, 220kV, 230kV, 330kV, and 500kV.
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Low Voltage (Secondary): 11kV, 22kV, 33kV, 66kV, 69kV, and custom-specified voltages.
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Capacity (MVA): From small units of 10 MVA to large units exceeding 500 MVA.
Our team can customize parameters such as vector groups, impedance, and cooling methods to perfectly match the specific needs of your substation.
Types of Substation Transformers We Offer
We provide a variety of substation transformer types, each optimized for different applications and operational environments.
Oil-Immersed Substation Transformers
The most common type, these transformers use high-quality mineral oil for both cooling and insulation. Their robust design and excellent heat dissipation make them ideal for outdoor substations and heavy-duty, continuous operation.
Dry-Type Substation Transformers
For indoor substations or environments where fire safety and environmental concerns are paramount, dry-type substation transformers are the perfect choice. They are non-flammable, require less maintenance, and are ideal for urban areas, hospitals, and commercial complexes.
Mobile Substation Transformers
These are self-contained transformers mounted on trailers, designed for rapid deployment. Mobile substation transformers are crucial for emergency situations, temporary power needs during maintenance, or to support power during events.
Custom Substation Transformers
We specialize in creating bespoke transformers tailored to complex specifications, including specific dimensions, noise reduction requirements, or special environmental protections.
Technical Features & Customization
Our transformers are built with advanced features and customization options to maximize performance and integration.
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Cooling Systems: We offer various cooling configurations, including ONAN (Oil Natural Air Natural), ONAF (Oil Natural Air Forced), OFAF (Oil Forced Air Forced), and ODAF (Oil Directed Air Forced), to optimize thermal management for any load profile.
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Tap Changers: Transformers can be equipped with On-Load Tap Changers (OLTC) for continuous voltage regulation or De-Energized Tap Changers (DETC) for offline adjustments.
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Efficiency & Losses: We design transformers to meet international standards such as IEC 60076 and IEEE C57, focusing on minimizing no-load and load losses to reduce lifetime operating costs.
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Monitoring & Controls: Options include digital monitoring systems, Buchholz relays, sudden pressure relays, and online gas and moisture analyzers for predictive maintenance and enhanced safety.
Common Substation Transformer Specifications
| Capacity (MVA) | Primary Voltage (kV) | Secondary Voltage (kV) | Cooling Type | Impedance (%) | Weight (kg) |
|---|---|---|---|---|---|
| 10 | 33 | 11 | ONAN/ONAF | 8 | 15000 |
| 30 | 132 | 33 | ONAF | 10 | 35000 |
| 100 | 220 | 66 | OFAF | 12 | 80000 |
| 250 | 330 | 132 | OFAF | 14 | 150000 |
| 500 | 500 | 220 | ODAF | 16 | 280000 |
Note: The specifications above are for illustrative purposes. We provide fully customizable solutions based on your specific project needs.
Applications & Use Cases
Our substation transformers are integral to the global energy landscape, serving a diverse range of customers and projects.
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Utilities & Grid Operators: Powering national grids and regional distribution networks, ensuring stable power for millions of consumers.
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Renewable Energy Projects: Integrating solar farms and wind power plants into the main grid.
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Industrial Facilities: Supplying reliable power to large-scale operations in mining, manufacturing, and data centers.
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EPC Projects: Providing customized and certified transformers for international engineering, procurement, and construction projects.
Why Choose Energy Transformer?
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Global Certifications: Our products are compliant with major international standards, including ANSI, IEC, IEEE, and GOST, and can be provided with certifications like CE and UL.
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Factory-Direct Manufacturing: As a leading substation transformer manufacturer, we control the entire process from design to delivery, ensuring quality and competitive pricing.
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Robust Quality Assurance: Every transformer undergoes rigorous testing, including routine, type, and special tests, to guarantee reliability. We welcome third-party inspections from agencies like SGS and Bureau Veritas.
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Proven Track Record: With years of experience exporting transformers to markets in North America, Europe, Africa, and the Middle East, we have the expertise to handle global logistics and compliance.
FAQs about Substation Transformers
Q: What is the lead time for a custom substation transformer? A: Lead times can vary depending on the transformer's size and complexity. For a standard unit, the typical lead time is 12-16 weeks. Please contact our sales team with your specifications for a more precise estimate.
Q: Can you provide installation and on-site support? A: While our primary focus is on manufacturing, we offer on-site supervision for installation and commissioning to ensure proper setup and functionality.
Q: What is the difference between a substation transformer and a distribution transformer? A: A substation transformer steps down high-voltage power for an entire distribution network. A distribution transformer is a smaller unit, typically located on a pole or pad, that takes power from the distribution network and steps it down further for direct use by homes or businesses.
Ready to Power Your Next Project?
Whether you're planning a new substation or upgrading an existing one, our team of engineers at Energy Transformer is ready to provide expert advice and a custom-engineered solution.
Contact us today to get a fast quote and take the first step toward a more reliable power system.