Dry Type Transformer
Sinotech supplies dry type transformers engineered for commercial buildings, industrial facilities, data centers, hospitals, and indoor substations where fire safety, environmental protection, and maintenance-free operation are top priorities. With IEC 60076-11 certified production and over 30 years of manufacturing experience, our dry type transformers deliver reliable performance without the risks and maintenance costs associated with oil-filled alternatives.
IEC 60076-11 certified epoxy resin Class F and Class H insulation
Custom enclosures available: IP20 standard, IP23 dust protection, stainless steel
Low noise designs below 55dB for sensitive environments
Low maintenance with no oil testing or replacement required
Custom Dry Type Transformer Manufacturer in China
Our dry type transformer portfolio covers 30kVA to 10,000kVA, with primary voltages from 3.3kV to 35kV and secondary outputs at 0.4kV or custom configurations. Standard models include SCB10, SCB11, SCB13 energy-efficient series featuring epoxy resin cast coils with Class F (155°C) or Class H (180°C) insulation systems. Every unit is built with high-grade aluminum or copper windings, vacuum-cast epoxy encapsulation, and optimized core designs that reduce no-load losses and operating noise to meet demanding indoor installation requirements.
Primary Voltage
3,300-34,500V
Secondary Voltage
120-600V
Capacity
30-10,000kVA
What Are the Standard Size of Sinotech Dry Type Transformer?
| Transformer Capacity (kVA) | High Voltage (kV | High Voltage Tap Range (%) | Low Voltage (kV | Rated Frequency (Hz) | Connection Group Number | No-load Loss (W) | Load Loss (W) | No-load Current (%) | Noise Level (dB) | Short Circuit Impedance (%) | Gauge A×B (mm×mm) | Main Unit (excluding enclosure) | Enclosure | ||||
| SCB12 | SCB13 | SCB12 | SCB13 | Overall Dimensions Length×Width×Height (m | Weight (kg) | Overall Dimensions Length×Width×Height (mm | Weight (kg) | ||||||||||
| 125 | 6 6.3 6.6 10 10.5 11 | ;5 ;2× 2.5 | 0.4 | 50 | Dyn11 Yyn0 | 375 | 335 | 1850 | 1660 | 1.3 | 58 | 4 | 550×550 | 920×610×1120 | 685 | 500×1150×2200 | 230 |
| 160 | 430 | 385 | 2130 | 1910 | 1.3 | 58 | 550×550 | 950×610×1120 | 735 | 1500×1150×2200 | 230 | ||||||
| 200 | 495 | 445 | 2530 | 2270 | 1.1 | 58 | 660×660 | 990×720×1150 | 820 | 1500×1150×2200 | 230 | ||||||
| 250 | 575 | 515 | 2760 | 2480 | 1.1 | 58 | 660×660 | 1030×720×1180 | 960 | 1500×1150×2200 | 230 | ||||||
| 315 | 705 | 635 | 3470 | 3120 | 1 | 60 | 660×660 | 1050×720×1210 | 1080 | 1500×1150×2200 | 230 | ||||||
| 400 | 785 | 705 | 3990 | 3590 | 1 | 60 | 660×660 | 1060×720×1270 | 1330 | 1600×1250×2200 | 250 | ||||||
| 500 | 930 | 835 | 4880 | 4390 | 1 | 62 | 660×820 | 1110×880×1340 | 1480 | 1600×1250×2200 | 250 | ||||||
| 630 | 1040 | 935 | 5960 | 5360 | 0.85 | 62 | 6 | 660×820 | 1240×880×1300 | 1530 | 1800×1450×2200 | 280 | |||||
| 800 | 1210 | 1090 | 6960 | 6260 | 0.85 | 64 | 660×820 | 1320×880×1350 | 1840 | 1800×1450×2200 | 280 | ||||||
| 1000 | 1410 | 1270 | 8130 | 7310 | 0.85 | 64 | 660×820 | 1360×880×1460 | 2320 | 1800×1450×2200 | 280 | ||||||
| 1250 | 1670 | 1500 | 9690 | 8720 | 0.85 | 65 | 820×820 | 1430×880×1520 | 2530 | 1900×1450×2200 | 320 | ||||||
| 1600 | 1960 | 1760 | 11700 | 10500 | 0.85 | 66 | h070×1070 | 1470×1130×1690 | 3010 | 1950×1500×2200 | 350 | ||||||
| 2000 | 2440 | 2190 | 14400 | 13000 | 0.7 | 66 | 070×1070 | 1510×1130×1770 | 3540 | 2000×1500×2200 | 350 | ||||||
| 2500 | 2880 | 2590 | 17100 | 15400 | 0.7 | 71 | h070×1070 | 1560×1130×1900 | 4190 | 2300×1600×2200 | 400 | ||||||
Note: Above Is Technical Parameters of 10kV Level SCB Series Dry-type Transformer
Custom Dry Type Transformer Solutions
Custom engineering is available for non-standard applications. Whether you need low-noise designs below 55dB, elevated enclosures for humid environments, special impedance values for harmonic loads, or dual-voltage configurations for multi-source systems.
Proven custom applications include low-noise units below 50dB for hospital operating theaters, Class H transformers for steel plant environments exceeding 45°C ambient, IP23 enclosures for cement factory dust protection, dual-voltage 400V/415V configurations for mixed-use commercial complexes, and K-rated transformers for data center harmonic management.
Each project comes with dedicated engineering support from specification through commissioning.
Data Centers and IT Facilities
Hospitals and Healthcare Facilities
Industrial and Manufacturing Facilities
Key Advantages of Sinotech Dry Type Transformer
Engineered for maximum indoor safety, environmental peace of mind, and zero liquid hazards, our dry-type distribution transformers deliver exceptional value and reliable performance for your commercial and public infrastructure.
Ultimate Fire Security
By eliminating flammable liquids, our dry type transformers enhance indoor safety and eliminate oil spill hazards. Featuring self-extinguishing resin construction, we ensure zero fire or explosion risks, complying with all strict local commercial building codes.
Zero Fluid Maintenance
Because they require no liquid insulants, our dry-type units eliminate oil testing, fluid filtration, and spill cleanup. You enjoy maintenance-free, pollution-free operation that emits zero greenhouse gases, minimizing long-term upkeep for your project facility.
Lower Civil Build Cost
Installing our dry-type transformers significantly reduces your civil installation expenditure. Because no oil containment pits, firewalls, or water sprinklers are needed, we help you simplify building preparation and lower total indoor site construction costs.
Compact Load Placement
Our dry-type design requires no special subterranean vaults, allowing placement directly inside your load centers. Positioning power transformation near your equipment shortens long low-voltage cable runs, cutting line losses and expensive project wiring budgets.
Strong Seismic Designs
Engineered with a rigid resin structure, our transformers withstand seismic vibrations and mechanical shocks effortlessly. Low impedance and superior electrodynamic strength deliver exceptional short-circuit resistance to keep your grid stable under faults.
High Moisture Defenses
Built with Class F/H high-temperature insulation, our units endure high thermal stress without degrading. Their vacuum impregnated seals provide superior moisture ingress protection and corrosion resistance, ensuring long service life in damp, dirty project sites.
Dry Type vs. Oil Immersed Transformers
Choosing between a dry type transformer and an oil immersed transformer is one of the most critical decisions for electrical contractors, facility engineers, and project developers. While both transform voltage to power your infrastructure, they differ significantly in cooling media, fire safety ratings, total cost of ownership (TCO), and site installation requirements.
- Insulation and Cooling Medium:
Operates without any insulating liquids, using solid epoxy resin casting or air convection to eliminate fluid leak hazards completely. - Fire Safety and Site Suitability:
Offers 100% self-extinguishing fire protection. Ideal for indoor high-rises, hospitals, subways, and data centers without requiring oil containment pits or firewalls. - CAPEX and Lifecycle Cost:
Higher initial equipment purchasing cost (up to 2x price for smaller kVA ratings), but significantly lowers indoor civil construction and fire containment expenses. - Thermal Performance:
Air cooling provides lower thermal dissipation density, making the unit more sensitive to ambient heat and continuous peak overload conditions. - Maintenance and Servicing:
Virtually maintenance-free—eliminates fluid testing, oil sampling, and gasket leak checks; technicians only perform routine surface dusting.
- Insulation and Cooling Medium:
Submerges active core and coils in dielectric mineral oil or biodegradable FR3 vegetable fluid, providing high liquid thermal dissipation under heavy loads. - Fire Safety and Site Suitability:
Standard outdoor rating requiring oil containment pits or safety fire clearances (though natural ester bio-fluids like FR3 with fire points >300°C allow expanded indoor usage). - CAPEX and Lifecycle Cost:
Significantly lower initial purchasing CAPEX (saving up to 50%), offering maximum cost efficiency for large capacity outdoor utility installations. - Thermal Performance:
Exceptional thermal inertia and liquid convection cooling, handling heavy continuous grid loads and summer overloads effortlessly. - Maintenance and Servicing:
Fully field-maintainable—allows on-site oil testing, fluid filtration, and gasket restoration to extend total asset lifespan up to 40+ years.
Quick Selection Decision Guide:
Choose Dry-Type Transformers If:
Your project is located in indoor commercial centers or strictly regulated public spaces—such as high-rise office towers in New York, London, or Singapore, underground subway stations, tunnels, hospitals, airports, data centers, or drinking water protection zones—where local building codes and environmental regulations strictly prohibit flammable insulating oil.
Choose Liquid-Filled Transformers If:
Your project is located in outdoor environments—such as utility power substations, solar PV and wind farms, mining sites, or heavy industrial complexes—where space allows proper safety clearances, or where you require large capacity, high voltage scaling, and maximum overload capability at the lowest initial equipment cost.
Key Components of Our Dry Type Transformer
Every component inside a Sinotech dry type transformer is engineered with premium materials, precision manufacturing, and strict quality control to deliver maximum operational stability, low energy loss, and long-term peace of mind for your facility.
High-Grade Core and Precision Windings
Built with high-permeability grain-oriented silicon steel (CRGO) and precision-wound 100% oxygen-free copper or aluminum conductors, our cores and windings deliver ultra-low no-load losses. This precision construction enhances short-circuit withstand capability while significantly reducing long-term operating costs across your facility’s lifetime.
Class H and F Solid Insulation Systems
Utilizing Class H (180°C) or Class F (155°C) non-hygroscopic, flame-retardant materials, our vacuum pressure impregnated (VPI) or resin-cast insulation completely seals internal components. This creates a 100% self-extinguishing fire barrier that prevents moisture absorption in damp or coastal sites while providing high thermal overload margins.
Smart Thermostatically Controlled Cooling
Integrated low-noise cross-flow cooling fans work seamlessly with automated digital controllers to regulate operating temperatures. By automatically activating fans only when winding temperatures breach set thresholds, the system provides up to 50% additional overload capacity during peak demand without increasing baseline energy consumption.
Heavy-Duty Protective Enclosures
Fabricated from heavy-gauge cold-rolled or stainless steel with electrostatic powder coatings (IP20 to IP54 ratings), our enclosures shield internal active parts from dust, vermin, and corrosive atmospheres. This rugged housing maintains equipment integrity in tough industrial settings while ensuring complete safety for nearby personnel.
Precision Copper Busbars and High-Dielectric Bushings
Precision laser-cut copper busbars feature tin- or silver-plating paired with high-creepage resin or porcelain bushings. This design minimizes joint contact resistance and prevents terminal overheating, ensuring smooth, trouble-free alignment with your site’s incoming and outgoing power cables.
Digital Monitoring and SCADA Protection
Multi-channel PT100 digital temperature controllers support RS485 and Modbus communication protocols for direct integration into your SCADA system. Real-time temperature tracking, early thermal warning alarms, and automated trip protection safeguard your grid against catastrophic power failures.
FAQ:
Dry type transformers deliver cost efficiency by reducing civil building preparation—eliminating the need for oil containment pits, firewalls, and water sprinkler systems. Combined with zero oil testing, lower insurance premiums, and virtually maintenance-free operation, they provide excellent Total Cost of Ownership (TCO) for indoor installations.
Absolutely. Our cast resin transformers (CRT) use Class F/H non-hygroscopic epoxy resin and vacuum pressure impregnation (VPI) that completely seal winding coils against moisture and corrosive dust. They perform dependably in high-humidity basements, coastal climates, and tropical sites without risk of condensation breakdown or insulation cracking.
Yes. We specialize in custom dimensions, top or bottom cable entry, and tailored busbar positioning to fit narrow doorway clearances and tight indoor basement vaults. Whether you are replacing an old transformer or fitting into a restricted electrical room, we engineer our cabinets to match your exact site layout seamlessly.
Yes. Our dry-type transformers are engineered using high-permeability silicon steel cores with precision clamping and anti-vibration rubber pads, complying strictly with NEMA ST-20 low-noise standards. They operate with ultra-low decibel levels, ensuring silent performance that will not disturb tenants in office towers, hospitals, or residential high-rises.
When equipped with forced-air (AF) cooling fans and digital thermostats, our dry-type transformers can deliver 30% to 50% additional power capacity above their natural-air (AN) baseline rating. This allows your facility to handle temporary peak power demands efficiently without purchasing a larger base-capacity transformer.
High Quality, Reliable, and Long lasting Dry Transformer
Sinotech delivers custom dry type transformer solutions engineered for projects with specific technical requirements that exceed standard catalog specifications. From low-noise designs for hospitals and data centers to corrosion-resistant enclosures for coastal facilities, we build transformers that match your exact operational requirements
30+ Years of Industry Expertise
With over 30 years of combined experience in power electrical engineering, Sinotech brings unmatched technical depth to every project. Our team understands the complexities of different voltage levels, load profiles, and environmental conditions.
Large Manufacturing Capability
Sinotech operates a world-class manufacturing base capable of handling both small custom orders and large-volume utility projects. Our scale ensures consistent quality, competitive pricing, and reliable delivery for clients worldwide.
Comprehensive Product Portfolio
Sinotech offers a complete range of power transformation products, eliminating the need for multiple suppliers. From distribution transformers to prefabricated substations, we cover your entire power infrastructure requirements.
Full Customization Capability
Sinotech engineers custom transformer solutions for high-altitude zones, extreme temperatures, corrosive atmospheres, and renewable energy applications with documented project success.
IEC, ANSI, and CE Certified Quality
Every Sinotech transformer meets stringent international standards. We provide full test reports and certification documentation with each shipment, ensuring regulatory compliance in your target market.
Rigorous Quality Control Process
Quality is built into every step of our manufacturing process. From silicon steel core selection to vacuum oil filling, Sinotech maintains strict controls to guarantee performance, safety, and long service life.
Contact Us Now
OEM Dry Type Transformer Supplier
Our production lines support both standard power transformer models and fully custom designs, with annual capacity exceeding 15,000 transformer units. We have successfully executed OEM orders for clients in Southeast Asia, the Middle East, Africa, Latin America and more.
Our production lines support both standard power transformer models and fully custom designs, with annual capacity exceeding 15,000 transformer units. We have successfully executed OEM orders for clients in Southeast Asia, the Middle East, Africa, Latin America and more.
Sinotech welcomes inquiries from distributors, brand owners, and EPC contractors seeking a reliable power transformer manufacturer.
Commercial Tower — Singapore
“Purchased 4 units of 2000kVA 11kV/0.4kV dry type transformers for our commercial tower. Low noise and compact design fit perfectly in the basement. Sinotech delivered ahead of schedule with full IEC certification.”
Global Clients
