Dry Type Transformer
From 30 kVA to 2,500 kVA across four specialized series, every Unicore dry type transformer supports full customization of voltage, capacity, and enclosure protection. Built to perform in the most demanding environments, with up to 75% lower no-load losses and zero routine maintenance.
Oil-free and fire-safe, our dry type transformers can be installed directly at the load center — no separate transformer room required. Trusted across high-rise buildings, hospitals, subways, airports, and critical infrastructure worldwide.
Custom Transformer Solutions
Voltage: 6-38.5 kV
Capacity: 30-25,000 kVA
Frequency: 50/60 Hz
Access Top Quality Transformer Solutions to Elevate Your Power Projects
Reliable Dry Type Transformer For Sale
SCB Series Industrial Dry Type Power Transformer
Reliable for commercial and industrial power distribution. Oil-free, fire-safe, installable directly at the load center. Suitable for high-rise buildings, airports, tunnels, chemical plants, nuclear power plants, and marine vessels.
Voltage: 6-38.5 kV
Capacity: 30 kVA – 25,000 kVA
Low loss, low noise
Moisture& harsh environment rated
Enclosure IP00–IP54 available
SCBH Series Amorphous Alloy Dry Transformer
The energy-saving choice for environments with significant load fluctuations. Amorphous alloy core cuts no-load losses by up to 75%, making it ideal for highways, urban infrastructure, and residential communities.
Voltage: 6-11 kV
Capacity: up to 25,000 kVA
No-load loss reduced by up to 75%
Load loss down 15%
Flame-retardant
SCB-RL Series Triangular Wound Core Transformer
Built on patented three-dimensional wound core technology for a fully symmetrical magnetic circuit. Lower losses and quieter operation for hospitals, subways, shopping centers, and petrochemical facilities.
Voltage: 6-11 kV
Capacity: up to 25,000 kVA
Lower excitation current
Low noise, lightweight
Fully symmetrical magnetic circuit
SGB Series H-Pole Insulated Dry Type Transformer
Engineered for extreme conditions: high fire risk, heavy load fluctuation, harsh or humid environments. DuPont NOMEX H-class insulation and 100% waterproof sealing make it the preferred choice for nuclear plants and offshore vessels.
Voltage: 6-11 kV
Capacity: up to 25,000 kVA
120% overload
Zero smoke at 800°C
100% waterproof sealed
SCB(10kv) Series Sample Specifications — Full Data for All Series Available Upon Request
Specifications
| Capacity (kVA) | High Voltage (kV) | High Voltage Tap Range (%) | Low Voltage (kV) | Frequency (Hz) | Connection Group Number | No-load Loss (W) | Load Loss (W) | No-load Current (%) | Noise Level (dB) | Short-circuit Impedance (%) | Gauge (mm×mm) | ||
| SCB12 | SCB13 | SCB12 | SCB13 | ||||||||||
| 125 | 6 6.3 6.6 10 10.5 11 | ±5; ±2× 2.5 | 0.4 | 50 60 | Dyn11 Yyn0 | 375 | 335 | 1850 | 1660 | 1.3 | 58 | 4 | 550×550 |
| 160 | 430 | 385 | 2130 | 1910 | 1.3 | 58 | 550×550 | ||||||
| 200 | 495 | 445 | 2530 | 2270 | 1.1 | 58 | 660×660 | ||||||
| 250 | 575 | 515 | 2760 | 2480 | 1.1 | 58 | 660×660 | ||||||
| 315 | 705 | 635 | 3470 | 3120 | 1 | 60 | 660×660 | ||||||
| 400 | 785 | 705 | 3990 | 3590 | 1 | 60 | 660×660 | ||||||
| 500 | 930 | 835 | 4880 | 4390 | 1 | 62 | 660×820 | ||||||
| 630 | 1040 | 935 | 5960 | 5360 | 0.85 | 62 | 6 | 660×820 | |||||
| 800 | 1210 | 1090 | 6960 | 6260 | 0.85 | 64 | 660×820 | ||||||
| 1000 | 1410 | 1270 | 8130 | 7310 | 0.85 | 64 | 660×820 | ||||||
| 1250 | 1670 | 1500 | 9690 | 8720 | 0.85 | 65 | 820×820 | ||||||
| 1600 | 1960 | 1760 | 11700 | 10500 | 0.85 | 66 | 1070×1070 | ||||||
| 2000 | 2440 | 2190 | 14400 | 13000 | 0.7 | 66 | 1070×1070 | ||||||
| 2500 | 2880 | 2590 | 17100 | 15400 | 0.7 | 71 | 1070×1070 | ||||||
Discover Core Advantages of Transformers to Optimize Your Power Layout
Remarkable Advantages of Unicore Dry Type Transformers
Fire Safe and Pollution Free
Oil-free epoxy resin construction completely eliminates fire and liquid leakage risk. Units install directly at the load center inside occupied buildings — no dedicated transformer room, fire suppression system, or containment infrastructure required. Suitable for hospitals, subways, and any environment where fire safety is non-negotiable.
Low Loss and High Efficiency
The core uses grain-oriented cold-rolled silicon steel with a 45-degree full-staggered joint structure, ensuring low no-load losses across the full capacity range. The amorphous alloy core option reduces no-load losses by up to 75% and load losses by up to 15%, delivering measurable energy savings over the transformer’s full service life.
Strong Overload Capacity
Excellent heat dissipation and high thermal stability support reliable operation under sustained overload conditions without compromising performance. Forced air cooling is available on the SCB series for higher capacity operation. The SGB series sustains 120% continuous overload under IP45 protection without any forced cooling required.
Moisture and Corrosion Resistant
High-voltage windings are fully vacuum-cast in epoxy resin, forming a sealed rigid body that blocks moisture, harmful gases, and corrosive chemicals. Reliable in coastal environments, chemical plants, tunnels, and other harsh conditions where conventional units would require additional protection.
Intelligent Temperature Monitoring
The intelligent temperature control system automatically monitors all three-phase winding temperatures in real time, starts and stops cooling fans based on live readings, and includes fully configurable alarm and trip functions. Ensures safe, unattended operation around the clock under all operating conditions.
Smart Monitoring and Zero Maintenance
No oil to inspect, test, or replace — eliminating routine maintenance requirements and reducing lifetime operating costs. Remote monitoring provides real-time visibility of equipment status, enabling centralized management of multiple units without on-site inspection.
Trusted by Clients Across Industries and Continents
Unicore Dry Type Transformer Global Cases
Dry Type Transformer to Romania
Urban Infrastructure Project
800 kVA
Dry Type Transformer to Malaysia
Commercial Building Project
500 kVA
Dry Type Transformer to Croatia
Industrial Power Distribution
1,600 kVA
UNICORE ELECTRIC
Transformer Solutions
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Real Experiences from Transformer Professionals Who Trust Unicore
What Our Clients Say
Low Noise Performance, SCB-RL Series
“We installed the SCB-RL three-dimensional wound core dry type transformers for a subway station project. The noise level during operation is noticeably lower than units we have used before, which was a key requirement for the project. The three-phase magnetic circuit design performs consistently under varying load conditions. Commissioning was straightforward and the units have been running without issue.”
Mikhail
Russia
⭐⭐⭐⭐⭐
Precision Performance at 35kV, SCB Series
“We specified the 35kV SCB series for a large-scale industrial power distribution project. The units arrived well-packaged and in perfect condition. Electrical performance matched the rated specifications exactly during our acceptance testing. The epoxy resin encapsulation has held up well in our outdoor substation environment. A dependable product from a supplier we would work with again.”
Santiago
Chile
⭐⭐⭐⭐⭐
High-Safety and Eco-Friendly Power Solutions for Critical Environments
Applications of Dry Type Transformer
Public & Commercial Buildings
1. High-density commercial shopping malls and large retail centers
2. Modern hospitals and critical medical healthcare complex facilities
3. Large educational institutions and university campus facilities
Critical Industrial Operations
1. Continuous process manufacturing and heavy industrial production facilities
2. Just-in-time (JIT) manufacturing and advanced industrial supply plants
3. Highly automated assembly and precision packaging production lines
Hazardous & Chemical Industries
1. Oil refineries and integrated petrochemical chemical processing plants
2. Offshore oil drilling platforms and marine transportation vessels
3. Hazardous natural gas processing and pipeline distribution facilities
Environmentally Sensitive Zones
1. Protected municipal water sources and vital ecological systems
2. Natural forest reserves and protected wildlife wetland environments
3. Environmentally restricted and sustainable green renewable energy parks
Underground & Confined Spaces
1. Underground urban railway and modern metro transit systems
2. Confined building basements and indoor power distribution substations
3. Deep underground mining operations and resource extraction tunnels
Data Centers & Tech Infrastructure
1. High-tier server farms and massive data processing centers
2. Critical telecommunication networks and broadcasting communication hub facilities
3. Advanced technological research and specialized scientific testing laboratories
Evaluating Safety, Infrastructure, and Operational Requirements
Dry-Type vs. Liquid-Filled Transformers
Dry-type transformers use solid insulation and air cooling, while liquid-filled transformers rely on dielectric fluids (mineral oil, esters, or silicone) for insulation and heat dissipation. Comparing these technologies is critical for project planning, as your choice directly dictates facility safety, civil infrastructure design, and long-term maintenance requirements.
1. Core Comparisons
| Dry-Type Transformers | Liquid-Filled Transformers | |
| Upfront Equipment Cost | Higher | Lower |
| Installation & Civil Works | Zero liquid containment required. Can be placed directly at the load center | Expensive fire vaults and mandatory liquid catch basins required |
| Maintenance Expenses | Virtually maintenance-free. Only routine visual checks and dusting needed | Ongoing costs for periodic liquid sampling, DGA testing, and filtration |
| Compliance & Insurance | Self-extinguishing materials lower fire risks and insurance premiums | Flammable or spillable liquids demand strict permits and higher insurance rates |
| Total Lifecycle Cost | Highly economical for indoor, commercial, and critical public projects | Becomes costly indoors due to mandatory safety and environmental infrastructure |
2. When is Dry Type the Smart Financial Choice?
Choosing a dry type transformer is a strategic investment to eliminate long-term liabilities. It is the absolute right choice when:
1) You are installing indoors or in high-rise buildings where constructing fireproof vaults and liquid catch basins is financially or structurally impossible.
2) Your facility lacks a dedicated electrical maintenance team to handle ongoing chemical liquid testing.
3) You operate in environmentally restricted zones where a single liquid spill could result in massive regulatory fines and cleanup costs.
4) You want a “set-it-and-forget-it” power solution that guarantees safety and predictable long-term operational costs.
Note: We manufacture both oil immersed and dry type transformers. Unsure which one fits your project? Contact our team anytime for expert selection advice.
Core Insulation Technologies and Enclosure Options
Available Configurations & Technology Options
To meet diverse operational demands and site environments, our dry-type transformer portfolio is built around two primary insulation technologies—Cast Resin Encapsulated (SCB Series) and VPI Ventilated (SGB Series)—complemented by specialized application designs and flexible enclosure protection ratings.
1. Core Transformer Technologies
Cast Resin / Epoxy Encapsulated (SCB Series)
Technical Highlights: Vacuum-cast epoxy resin insulation, 100% moisture-proof and dust-proof, self-extinguishing with zero fire risk. (Advanced options available: SCBH Series with Amorphous Alloy core for 60-70% lower no-load loss, and SCB-RL Series with 3D Triangular Wound core for ultra-low noise).
Key Benefits: Eliminates indoor fire liabilities and withstands severe humidity, salt spray, and chemical corrosion.
Ideal Applications: High-rise commercial buildings, modern hospitals, data centers, and coastal/chemical plants.
VPI Ventilated Type (SGB Series)
Technical Highlights: Vacuum Pressure Impregnated (VPI) with H-class insulation (up to 220°C) and superior natural air-cooling heat dissipation.
Key Benefits: Delivers high overload tolerance and long-term power reliability while optimizing your upfront equipment budget.
Ideal Applications: Standard manufacturing factories, commercial distribution rooms, and indoor substations.
Specialized & Custom Applications
Technical Highlights: Custom K-factor harmonic protection, electrostatic shielding, automated fan cooling, and intelligent signal temperature control.
Key Benefits: Protects sensitive IT equipment from harmonic distortion and adapts seamlessly to extreme mining or solar grid conditions.
Ideal Applications: Data center Power Distribution Units (PDUs), solar/wind grid tie-ins, and mining operations.
2. Enclosure Protection Options
IP00 (Bare Unit): Compact unenclosed design for direct integration into existing customer switchgear or PDU cabinets.
IP20 / IP23 (Indoor Ventilated Housing): Standard indoor protective housing protecting against solid objects (>12.5mm) and accidental water dripping.
IP54 / IP65 / NEMA 3R (Outdoor Weatherproof Housing): Fully sealed heavy-duty enclosure engineered to withstand heavy rain, blowing sand, and severe outdoor weather.
Tailored Electrical and Mechanical Designs for Non-Standard Applications
Custom Dry Type Transformer & Engineering Solutions
When off-the-shelf standard transformers cannot satisfy your site constraints, our Custom Engineering Center delivers modified-to-order solutions. From restricted physical footprints to harsh hazardous environments, our engineering team modifies and customizes transformers to solve your toughest application challenges.
Mechanical & Spatial Engineering
Custom Dimensions: Tailored footprints and compact enclosure designs to fit narrow elevator shafts, retrofitted basements, or restricted spaces.
Heavy-Duty Materials: Premium 304 or 316 Stainless Steel enclosures, durable C5-M marine-grade anti-corrosion paint, and custom color matching.
Specialized Enclosures: NEMA 4X, NEMA 12 (totally enclosed non-ventilated), and Class I, Div 2 hazardous/explosion-proof designs.
Advanced Safety & Diagnostic
Infrared (IR) Viewing Windows: Factory-installed IR inspection ports allowing safe thermal camera diagnostics without opening live high-voltage doors.
Arc-Flash Risk Reduction: Integrated secondary circuit breakers and interlocked hinged doors to minimize Arc-Flash hazards during maintenance.
Full Compliance Assurance: Tailored engineering certified to meet specific IEEE, IEC, UL, NEMA, and regional safety standards.
Electrical and Environmental
Ultra-Low Noise Engineering: Low-decibel designs (-5dB to -10dB below NEMA/IEC standards) for quiet residential, hospital, or office environments.
High-Altitude Compensation: Custom-designed thermal and dielectric insulation for operation at high altitudes (>2,000m / 4,000m).
Custom Electrical Tuning: Special impedance matching, custom primary/secondary voltage taps, and high K-factor harmonic mitigation.
Fast Installation and Substation
Plug-and-Play Connectors: Factory pre-terminated cable leads and quick-connect plugs to significantly slash job-site installation time.
Integrated Unit Substations: Package packaging combining primary/secondary circuit breakers directly with the dry-type transformer.
Smart IoT Monitoring: Custom rating plates, Modbus IoT smart temperature controllers, and remote cloud diagnostic interfaces.
Why Choose Unicore
Your Trusted Partner in Power Solutions
With over 30 years of manufacturing experience, we produce epoxy resin cast dry type transformers across four specialized series — covering 6 to 38.5 kV and 30 to 2,500 kVA. Every unit is built to IEC 60076-11 standards and trusted by clients in 80+ countries worldwide.
Custom Design Available
Voltage, capacity, enclosure protection level, and insulation class are all fully configurable to meet your specific project requirements.
Reliable Delivery and Support
Orders are fulfilled to agreed timelines with full technical support available throughout installation and commissioning.