MV Dry Type Power Transformers
2. Environmental Friendliness and Clean Operation
3. Low Maintenance and Operational Simplicity
4. Excellent Resistance to Contamination and Moisture
5. High Overload Capacity and Robustness
6. Ease of Installation and Space Efficiency
MV Dry Type Power Transformers
LTEC Manufactures Vacuum Pressure impregnated transformers, Vacuum Pressure Encapsulation transformers,medium voltage/low voltage (MV/LV) and medium voltage/medium voltage (MV/MV) up to 2500kVA and 13.8 kV.
The transformers are designed in accordance with norms IEC 60076-11 in order to optimize the efficiency. the calculation is made according to Ecodesign regulation, norms EN 50588-1.
When the transformers are connected to inverters, the design is made as stated from IEC 61378-1 norms.
For all transformers the large experience, the technological ability connected with high quality guarantees a reliable product with an expected lifetime span in normal condition over 25 years.
The company total Quality management system is based on certified Quality Assurance system ISO 9001- 2015,Environmental ISO 14001-2015.
Key Benefits:
Exceptional Energy Efficiency: Utilizing high-quality oriented silicon steel and low-loss winding design, LTEC's MV dry-type power transformers all meet and exceed national Level 1 energy efficiency standards, significantly reducing your system's total life cycle costs.
Superior Safety & Fire Resistance: Our transformers feature an oil-free dry-type design, eliminating the risks of oil leakage and explosion. The internal self-extinguishing flame-retardant materials comply with strict fire safety regulations, making them the ideal choice for indoor applications.
Resilient Load Management: This power transformer is specifically designed and optimized for high dynamic loads and frequent fluctuations. It is the best choice for your inverter applications.
Extreme Environmental Adaptability: Offering protection up to IP45, our transformers feature world-leading moisture, salt spray, and dust resistance.
Applications of Dry Type Distribution Transformers




1. Commercial Buildings & Infrastructure
2. Industrial Facilities
3. Renewable Energy Systems
4. Critical Infrastructure
5. Special Environments
6. Smart Grid Applications
MV Dry Type Power Transformers Technical Specifications
|
Category |
Parameter |
Specification |
|
Basic Ratings |
Rated Capacity |
Up to 10 MVA |
|
Rated Primary Voltage |
3kV-13.8 kV (±10% tolerance) |
|
|
Rated Secondary Voltage |
120V-480V |
|
|
Frequency |
50Hz/60Hz |
|
|
Performance |
Efficiency |
>95% |
|
Tap Range |
±5% or 2×2.5% |
|
|
Construction |
Design Type |
Three-phase, dry-type iron core, open type |
|
Winding Material |
Copper/Aluminum |
|
|
Terminal Type |
Copper bus bars |
|
|
Insulation Structure |
VPI (Vacuum Pressure Impregnated) |
|
|
Cooling & Thermal |
Cooling Method |
Natural air-cooled (AN) with effective cooling design |
|
Insulation Class |
H (180°C) standard, C class optional, R (220°C) certified |
|
|
Insulation System |
UL1446 compliant |
|
|
Protection |
Protection Class |
IP00 (indoor mounting) |
|
Fire Resistance |
Fire-resistant materials |
|
|
Environmental |
Maximum Elevation |
≤1000m above sea level |
|
Maximum Humidity |
95% (non-condensing) |
|
|
Certifications |
Temperature Class Certified |
Class H (180°C) & Class R (220°C) |

Why Choose LTEC's MV Dry Type Power Transformers?
LTEC – Powering Your Systems with Innovation!
Enhanced Safety & Environmental Benefits
100% Flame-Retardant: UL-certified epoxy resin encapsulation prevents fire propagation (meets IEC 60076-11 standards).
Zero Oil Leaks: Eliminates soil/water contamination risks in sensitive areas (hospitals, data centers).
Low Toxicity: No PCBs or hazardous coolants - compliant with RoHS/REACH regulations.
Superior Engineering & Performance
High Efficiency Models: Up to 98.5% efficiency (meets DOE 2016 & EU Tier 2 standards).
Advanced Cooling Design: Patented ventilation channels enable 150°C rise operation.
Low Noise Operation: <55dB sound rating for urban installations (NEMA ST-20 compliant).
Extreme Environment Adaptability
Tropicalized Versions: Moisture-resistant (95% RH) with anti-fungal treatment.
Corrosion-Protected: Salt-spray tested for coastal/offshore applications.
High-Altitude Options: Special designs for 4000m+ elevation operation.
Smart Grid Readiness
IoT-Enabled Models: Built-in temperature/load monitoring (Modbus RTU/Profibus).
Harmonic Mitigation: K-Factor 4/13/20 designs for nonlinear loads.
Bi-Directional Capability: Supports renewable energy integration.
Maintenance & Operational Advantages
Self-Cleaning Coils: Nano-coating reduces dust accumulation.
Modular Design: Front-access terminals simplify installation.
30-Year Design Life: Accelerated aging tests verify longevity.
Customization Capabilities
Voltage Flexibility: 600V-35kV with multi-tap options (±2×2.5%).
Special Configurations: Delta-Zigzag, Dual Secondary, etc.
Compact Sizes: 40% smaller than conventional dry-types.
Compliance & Certifications
Global Approvals: UL/cUL, CE, IEC, GOST, CCC.
Seismic Rated: Certified for Zone 4 seismic activity.
Cyclone-Resistant: Wind-load tested to 200km/h.
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