Oil Immersed Transformer Manufacturer
Oil-immersed transformers utilize mineral oil medium for efficient heat dissipation and insulation protection, with a fully sealed structure that resists moisture and contaminants, specifically designed for harsh environments. The products cover a range of 30kVA-20,000kVA and 6kV-35kV, suitable for high-load scenarios such as metallurgical mines, rail transit, and new energy power plants. They maintain stable operation even under extreme conditions like high-temperature and dusty environments.
- High heat conductivity with oil cooling and strong heat dissipation performance.
- Stable thermal performance with sustained overload capacity (up to 150% rated power).
- Oil-filled tank protects windings from mechanical stress and vibration, compliant with IEEE C57.12 seismic standards.
- Cost-effective manufacturing through vertical integration and optimized material utilization.
- Tailored designs for specific applications, including voltage regulation, tap changers, and enclosure customization.

Featured Oil Type Transformers
Discover our comprehensive range of standard oil-filled transformers (Model S9-S22), designed to deliver exceptional performance across a variety of parameters. Also, if our standard products do not fully align with your specific needs, our expert team is at your service to craft customized transformer solutions for your electrical systems.

Core Advantages of Design
- Insulation performance: Natural ester insulating fluid
- Winding material: Copper or Aluminum
- Sealing performance: Hermetically sealed oil-filled construction
- Protective devices: Surge arresters
- Corrosion protection: Corrosion resistant coating
- Heat dissipation: Elastic corrugated sheet
Transform Your Power Needs
►Modify existing power transformer designs
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Design of custom transformers with various capacity and voltage combinations
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Customization of enclosures based on client usage scenarios
►Production based on provided technical drawings
►Custom nameplate manufacturing
Contact LVMA for Custom Transformer Solutions
Why Choose LVMA As Your Oil Immersed Transformer Manufacturer

Strong R&D Capability
We have an experienced R&D team, including electrical engineers, process experts, etc. They continue to improve their capabilities in transformer design, material application, manufacturing process, etc. For example, low-loss iron chips, efficient cooling systems, environmentally friendly insulating oil, etc.
Our in-house R&D laboratory is equipped with advanced R&D and testing equipment, capable of conducting transformer performance testing, reliability verification, environmental simulation, etc.
Exceptional Quality Control
Our transformers factory has passed ISO, IEC and other international authoritative certifications, and undergoes a number of rigorous tests before leaving the factory, such as routine tests, type tests, three-phase transformer zero-sequence impedance measurements, pressure deformation tests, short-circuit withstand capacity tests, etc.


Efficient Manufacturing
Thanks to our highly skilled workforce and state-of-the-art manufacturing facilities, your transformer can be ready in as fast as 10 days, shipped directly from our transformer factory.
Proven Expertise, Customized Solutions
LVMA has 7 years of experience in providing successful power solutions for different industries. We are a trustworthy transformer manufacturer integrating R&D, production and sales. Whether it is a complex industrial application or a customized power distribution project, we can ensure that you get effective solutions and professional technical guidance.

Q&A about Oil-immersed Transformers
Q: What is an oil-immersed transformer, and how does it work?
A: An oil-immersed transformer is a type of power transformer that uses insulating oil as both a coolant and an insulator. The oil absorbs heat generated by the core and windings, ensuring efficient heat dissipation, while also providing high dielectric strength to prevent electrical breakdown.
Q: What are the key advantages of oil-immersed transformers over dry-type transformers?
A: Oil-immersed transformers offer higher efficiency, better heat dissipation, and greater overload capacity. They are also more cost-effective for high-capacity applications and can operate reliably in harsh environments.
Q: Where are oil-immersed transformers typically used?
A: Power distribution networks, industrial plants, renewable energy systems, and utility substations, etc.
Q: Can oil-immersed transformers be used in extreme environments?
A: Yes, oil-immersed transformers are designed to operate in extreme temperatures, high humidity, and even seismic zones. Customized designs can further enhance their adaptability to specific environmental conditions.
Q: What's your customization process?
A: The process of our customized transformer is simple and seamless. First, we will finalize all technical specifications according to your needs; then create detailed CAD drawings and technical documentation for review; after the design drawings are approved, mass production will be arranged.
Q: How long does it take to manufacture a custom oil-immersed transformer?
A: Depending on the product details, the fast is 7-10 days, the slow is 15-25 days.
Q: Do you provide technical support during the installation and operation of oil-immersed transformers?
A: Yes, our team of experts provides full support, from initial consultation and design to installation guidance, maintenance training and troubleshooting assistance.
Q: Do you offer global shipping for oil-immersed transformers?
A: Yes, we ship our transformers worldwide, ensuring safe and timely delivery through reliable logistics partners.
As one of the most professional oil immersed transformer manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to wholesale oil immersed transformer for sale here from our factory. Contact us for customized design service.
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