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Dry-Type Transformers
10 Series · 1436 Models
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Dry-Type Transformers Overview
Dry-type transformers are essential components in modern electrical distribution systems, offering fire-safe, maintenance-free operation without insulating oil. QDTB dry-type transformers are designed for indoor applications in commercial buildings, hospitals, data centers, and industrial facilities. Our cast resin and open-wound designs cover 30 kVA to 3,300 kVA, up to 35 kV, meeting IEC 60076-11 standards.
Available Series
SCB14 Series
The SCB14 series delivers superior energy efficiency with Level 4 rating, offering significant energy savings and environmental benefits. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, Class F insulation with 65 K temperature rise, IP00–IP31 enclosure (IP42–IP66 available on request). Suitable for indoor substations, data centers, commercial buildings, industrial plants, and solar/wind farms.
SCB13 Series
The SCB13 series is an energy-efficient variant of cast resin dry-type transformers, meeting Level 3 energy efficiency standards with reduced no-load losses. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, Class F insulation with 65 K temperature rise, IP00–IP31 enclosure (IP42–IP66 available on request). Suitable for indoor substations, data centers, commercial buildings, industrial plants, and solar/wind farms.
SCB15 Series
The SCB15 series represents the highest energy efficiency class, achieving Level 5 rating with exceptional performance and minimal energy waste. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, Class F/H insulation with 65 K temperature rise, IP00–IP31 enclosure (IP42–IP66 available on request). Suitable for indoor substations, data centers, commercial buildings, industrial plants, and solar/wind farms.
SCBH15 Series
The SCBH15 series combines cast resin technology with amorphous alloy core material, achieving ultra-low no-load losses approximately 20% of traditional silicon steel transformers. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, Class F/H insulation with 65 K temperature rise, IP00–IP31 enclosure (IP42–IP66 available on request). Suitable for indoor substations, data centers, commercial buildings, industrial plants, and solar/wind farms.
SCR Series
The SCR series features special structural designs for specific application requirements, offering customized solutions for challenging environments. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, Class F insulation with 65 K temperature rise, IP00–IP31 enclosure (IP42–IP66 available on request). Suitable for indoor substations, data centers, commercial buildings, industrial plants, and solar/wind farms.
SG13 Series
The SG13 series features open-type construction with Level 3 energy efficiency, providing excellent ventilation and cooling for demanding applications. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, Class F insulation with 65 K temperature rise, IP00–IP31 enclosure (IP42–IP66 available on request). Suitable for indoor substations, data centers, commercial buildings, industrial plants, and solar/wind farms.
SCL13 Series
The SCL13 series features aluminum winding construction while maintaining Level 3 energy efficiency, offering cost-effective solutions for various applications. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, Class F insulation with 65 K temperature rise, IP00–IP31 enclosure (IP42–IP66 available on request). Suitable for indoor substations, data centers, commercial buildings, industrial plants, and solar/wind farms.
SCB Series
The SCB series represents three-phase cast resin dry-type transformers, featuring advanced insulation technology for reliable performance in indoor applications. Rated 10–5000 kVA, 0.48–34.5 kV primary and 0.208–0.48 kV secondary, Class F/H insulation with 65 K temperature rise, IP00–IP31 enclosure (IP42–IP66 available on request). Suitable for indoor substations, data centers, commercial buildings, industrial plants, and solar/wind farms.
VPI Dry-Type Transformers Series
VPI (Vacuum Pressure Impregnated) dry-type transformers use open-wound, Nomex-insulated coils impregnated under vacuum and pressure, combining fire safety and moisture resistance with a lighter, repairable construction. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, Class F/H insulation with 65 K temperature rise, IP00–IP31 enclosure (IP42–IP66 available on request). Suitable for oil & gas wellheads, chemical plants, coastal installations, and industrial facilities.
Specialty Dry-Type Transformers Series
Specialty dry-type transformers cover harmonic-rated K-factor units, marine three-proof designs, drive-isolation transformers for variable-frequency drives, and 12/24-pulse phase-shift rectifier duty, with US-standard options. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, Class F/H insulation with 65 K temperature rise, IP00–IP31 enclosure. Suitable for data centers, marine and offshore installations, VFD drives, and industrial rectifier systems.
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| Base price (interpolation) | $7,396 |
| × Product factor | ×1.0000 |
| × Country factor | ×1.0000 |
| × Copper-linked factor | ×1.0000 |
| + Options / accessories | $0 |
Aluminum winding — no copper linkage
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Application Scenarios
Commercial Buildings
Power distribution for malls and office towers with fire-safe solutions eliminating oil leakage risks.
Hospitals & Healthcare
Reliable power for medical equipment and life-support systems with low-noise operation.
Data Centers
High-efficiency distribution for server rooms supporting 24/7 operation.
Industrial Facilities
Safe oil-free electrical distribution for manufacturing plants.
Renewable Energy
Auxiliary power for solar and wind farms with excellent overload capacity.
Underground Installations
Ideal for metro stations and underground parking where fire regulations prohibit oil-filled equipment.
Technical Advantages
Fire-Safe Design
Cast resin insulation with self-extinguishing properties eliminates fire hazards.
Zero Maintenance
No oil changes or leak management needed throughout service life.
Low Noise
Advanced core construction achieves noise below 45 dB.
Eco-Friendly
No insulating oil, zero contamination risk, fully recyclable.
FAQ - Dry-Type Transformers
What is the difference between cast resin and open-wound dry-type transformers?
What standards do they comply with?
Can dry-type transformers be installed outdoors?
What is the expected service life?
How to select the right capacity?
When should I choose dry-type over oil-immersed?
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