Dry Type Transformer Manufacturer
Dry-type transformers feature an oil-free design with epoxy resin casting and intelligent thermal management technology. Covering a comprehensive range of 30-6,300kVA and 6-35kV, they offer customizable insulation classes (A/B/F/H/C) and deliver zero-risk operation in extreme temperatures (-25°C to +50°C). Specifically engineered for fire-sensitive environments like data centers and commercial complexes, these maintenance-free units with ultra-low energy loss demonstrate 30%+ annual operational cost reduction for global users.
- Ultra-Quiet Operation: ≤45dB no-load noise (tested per IEC 60076-11), ideal for hospitals and offices
- Self-extinguishing, F1 fire-resistant class (IEC 60726) with zero toxic fumes.
- Epoxy resin casting resists humidity, ideal for damp environments.
- Lightweight & Compact Structure
- Eco-Friendly & Maintenance-Free Operation
- Under forced air-cooling conditions, the overload capacity has been enhanced by 50%.
Featured Dry Type Transformers
Explore our dry type power transformer series (Model SCB10-SCB18, SGB10). Our dry type transformers are manufactured using VPI and epoxy resin casting technology, strictly following IEC 60076 standards.
Custom Dry Type Transformers Your Power Needs
LVMA provides you with a one-stop solution from designing custom transformer models to production, relying on an experienced team of transformer engineers and manufacturing factory. All you need to provide is a basic transformer design sketch or specifications.
Flexible Design Capabilities
LVMA supports customization of multiple voltage levels and capacity ranges (30-6300kVA, 6-35kV), and can also flexibly adjust the configuration according to the special environment in which the transformer is used.
Quick Feedback
LVMA can complete the transformer model manufacturing within 10 days after receiving the sketch.
Strictly Confidential
LVMA will keep confidential the professional data provided by customers, and we can sign a confidentiality agreement with customers.
Environmental Protection and Sustainability
LVMA implements efficient and energy-saving production processes, uses environmentally friendly and recyclable raw materials, and the factory has obtained ISO14001 certification.
Contact LVMA for Custom Transformer Solutions
How to Detect the Quality of LVMA's Transformers
Our factory has passed ISO, IEC and other international authoritative certifications. Our transformers undergo 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.
In-house Laboratory Testing
Our factory is equipped with advanced testing facilities. Before leaving the factory, each transformer undergoes rigorous testing.
Test Reports
We will provide detailed test reports if needed, documenting the various testing results. This allows you to verify the performance and quality of the product.
Factory Inspection for Bulk Orders
For customers placing bulk orders, we welcome you to visit our factory for an inspection. You can see our production processes and quality control measures firsthand at the site.
Sample Testing
You can purchase a single unit as a sample. This enables you to test the product in your project's environment before committing to a larger order.
Selection Guide
When selecting a suitable dry‑type transformer, please confirm the following core parameters to match your actual project requirements.
Key Parameters to Confirm
1. Rated Capacity (kVA) Available range: 30‑6300 kVA. Calculate the total load power of your system and reserve 10%‑25% overload margin for future load expansion.
2. Voltage Class (kV) Our standard voltage covers 6‑35 kV. Confirm primary‑side input voltage and secondary‑side output voltage, including tap‑changer requirements.
3. Model Type
SCB Series: Epoxy resin cast type, high mechanical strength, good short‑circuit resistance, suitable for data centers, hospitals, high‑rise buildings.
SGB Series: Vacuum pressure impregnated winding, better heat dissipation performance, ideal for high‑humidity, poor‑ventilation sites.
Model options: SCB10, SCB11, SCB13, SCB14, SCB18, SGB10.
4. Insulation Class
Customizable insulation classes: A/B/F/H/C. Class F and H are most widely used for harsh‑condition projects.
5. Ambient & Installation Conditions
Confirm installation altitude, ambient temperature range, indoor/outdoor layout, damp or dusty environment. For high‑altitude sites above 1000 m, capacity derating is required.
| Application Scenario | Recommended Series | Notes |
| Data Center / Commercial Complex | SCB13 / SCB14 | Low‑loss, low noise, fire‑safety priority |
| Hospital, Public Building | SCB10‑SCB13 | ≤45dB low‑noise operation |
| Factory & Industrial Workshop | SCB18 / SGB10 | Strong overload resistance |
| High‑humidity / Coastal Project | SGB(Z) Series | Anti‑moisture winding treatment |
Special Conditions Reminder
If forced air‑cooling system is equipped, the transformer overload capacity can increase up to 50%.
For projects requiring fire‑resistance, select F1 fire‑resistant grade (compliant with IEC 60726).
Zhejiang Lvma Electric Co., Ltd supports full customization for special voltage, capacity, insulation grades and installation accessories. Send your project specification, and our engineering team will provide targeted solution.
Cast Resin vs VPI
Two mainstream dry‑type transformer technologies: Cast Resin (SCB Series) and VPI Vacuum Pressure Impregnated (SGB Series). Each has unique strengths for different project environments.
| Item | Cast Resin (SCB Series) | VPI (SGB Series) |
| Winding Technology | Epoxy resin vacuum casting, coils fully encapsulated in epoxy resin | Vacuum Pressure Impregnation, windings impregnated with resin without full solid encapsulation |
| Mechanical & Short‑circuit Resistance | ✅ Excellent, high mechanical strength, strong short‑circuit withstand capability | Good, suitable for most industrial scenarios |
| Heat Dissipation | Good | ✅ Superior, better air flow between windings |
| Noise Level | Ultra‑low noise, as low as 45 dB | Slightly higher than cast‑resin type |
| Humidity & Condensation Resistance | Good, anti‑damp coating optional | ✅ Outstanding, perfect for coastal, high‑humidity, poor‑ventilation sites |
| Fire Performance | F1 fire‑resistant grade available (IEC 60726), zero toxic fumes | F1 fire grade optional, low‑smoke property |
| Overload Performance | Good | ✅ Better overload tolerance with forced air cooling |
| Typical Application | Data centers, hospitals, high‑rise commercial buildings, indoor public projects | Heavy‑duty factories, coastal sites, mining, high‑humidity workshops |
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.
FAQ
Q: What is an dry type transformer?
A: A dry-type transformer uses air for insulation and cooling, no insulating oil. It works by electromagnetic induction to convert voltage safely.
Q: What is the difference between oil and dry type transformers?
A: Dry type transformers are safer and more eco-friendly than oil-filled transformers, with no oil leakage risk and excellent fire resistance.
Q: Can dry type transformers be used outside?
A: Yes, but only outdoor-rated dry-type transformers with proper weather protection can be installed outside. Standard indoor units are not suitable.
Q: How do you size a transformer?
A: To size a transformer, calculate the required apparent power (kVA) by multiplying the secondary voltage by the required load current. The formula is: Apparent Power (VA) = Voltage (V) × Current (A).
Q: How much can you overload a dry type transformer?
A: For VPI dry-type transformers (220℃ insulation, 115℃ winding temperature rise), a 15% continuous overload is permissible without shortening the service life.
Q: How long does it take to manufacture a custom dry type transformer?
A: Depending on the product details, the fast is 7-10 days, the slow is 15-25 days.
Q: What is the kVA rating of a dry type transformer?
A: Dry type transformers commonly feature a kVA rating between 30 kVA and 6300 kVA, with custom larger-capacity units produced for special high-power scenarios.
Q: How many houses will a 1000 kVA transformer serve?
A: Assuming an average household uses about 5 kW of power, a 1000 kVA transformer can typically support 350 to 424 homes. This is calculated by dividing its actual power output (560–680 kW) by the average household consumption.
As one of the most professional dry type transformer manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to wholesale dry type transformer for sale here from our factory. Contact us for customized design service.
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