Are you looking for a safe, efficient, and environmentally friendly power distribution solution for your indoor or fire-sensitive applications? Welcome to Jinhand Electric Co., Ltd., a premier China manufacturer, supplier, and factory specializing in the design and production of high-performance Dry Type Transformers. With over a decade of industry expertise, Jinhand offers a comprehensive range of epoxy resin cast Dry Type Transformers engineered to deliver reliable, maintenance-free operation for mines, subways, hospitals, commercial centers, high-rise buildings, and all indoor power distribution systems worldwide. Our commitment to innovation, quality, and energy efficiency makes us the ideal partner for your critical infrastructure projects.
A Dry Type Transformer is a type of transformer that uses solid insulation (typically epoxy resin) instead of liquid oil for cooling and insulation. The core and coils are encapsulated in cast resin, making it inherently fire-safe, environmentally friendly, and maintenance-free. Unlike traditional oil-immersed transformers, Dry Type Transformers pose no risk of oil leaks, combustion, or explosion, making them the preferred choice for indoor installations, densely populated areas, and applications with stringent safety requirements.
Jinhand stands out as your ideal partner because we are not just a supplier; we are a vertically integrated manufacturer and factory with advanced production facilities and rigorous quality control systems. Our expertise lies in producing high-quality epoxy resin cast Dry Type Transformers that meet international standards (IEC 60076, GB 20052) and offer superior performance, including F1-class fire resistance, ultra-low energy losses, and a design life exceeding 30 years. As a leading China manufacturer, we provide cost-effective, customizable solutions backed by comprehensive technical support and global logistics.
Jinhand's Dry Type Transformer portfolio is designed to cater to a wide range of power capacity and application needs. Our primary series are:
The SCB14 series represents our high-performance, standard-efficiency range of cast resin transformers. They are designed to meet national Energy Efficiency Class 2 standards (GB 20052-2020), offering a perfect balance between initial investment and long-term energy savings.
Rated Capacity: Available from 30 kVA to 2500 kVA, covering most common indoor power distribution needs.
Voltage Compatibility: Supports high-voltage inputs of 6kV, 6.3kV, 6.6kV, 10kV, 10.5kV, and 11kV with ±5% or ±2×2.5% tap adjustment, and fixed 0.4kV low-voltage output.
Connection Groups: Compatible with Yyn0 and Dyn11 connection configurations.
Loss Performance: Features optimized low-loss design (e.g., 910W no-load loss for 630kVA model) to reduce operational energy consumption.
General commercial buildings, schools, hospitals, industrial facilities, and infrastructure projects where reliable performance and good energy efficiency are required.
The SCB18 series represents the pinnacle of energy efficiency in Jinhan's Dry Type Transformer lineup. Meeting the stringent national Energy Efficiency Class 1 standards, these transformers incorporate advanced electromagnetic design and premium materials to achieve significantly lower no-load and load losses compared to conventional models.
Ultra-Low Losses: Features dramatically reduced no-load loss and load loss, resulting in maximum energy savings over the transformer's lifetime.
Same Robust Construction: Maintains all the safety and durability features of the SCB14 series, including F1-class fire resistance and epoxy resin vacuum casting.
Reduced Carbon Footprint: The higher efficiency directly translates to lower CO2 emissions, supporting green building certifications and sustainability goals.
Projects with the highest energy-saving mandates, green buildings, facilities seeking long-term operational cost reduction , and applications eligible for energy efficiency subsidies.
For large-scale industrial applications, infrastructure hubs, and major commercial centers requiring substantial power, Jinhand offers customized high-capacity Dry Type Transformers.
High Capacity: Available in ratings like 1600kVA, 2000kVA, and 2500kVA to handle heavy loads.
Parallel Operation Capability: Supports parallel connection for capacity expansion up to 5000kVA.
Robust Design: Engineered with enhanced cooling systems (forced air cooling) and reinforced mechanical structures to handle high currents and thermal stresses.
Large industrial parks, major subway stations, airport terminals, large data centers, and high-rise landmark buildings.
Our commitment to quality is backed by concrete data from certified testing.
| Model (SCB14) | Rated Capacity (kVA) | HV (kV) | LV (kV) | Connection Group | No-Load Loss (W) @120°C | Load Loss (W) @120°C | No-Load Current (%) | Short-Circuit Impedance (%) |
| SCB14-30/10-NX2 | 30 | 6-11 | 0.4 | Yyn0/Dyn11 | 130 | 640 | 2.0 | 4.0 |
| SCB14-100/10-NX2 | 100 | 6-11 | 0.4 | Yyn0/Dyn11 | 270 | 1415 | 1.5 | 4.0 |
| SCB14-400/10-NX2 | 400 | 6-11 | 0.4 | Yyn0/Dyn11 | 665 | 3590 | 1.0 | 4.0 |
| SCB14-630/10-NX2 | 630 | 6-11 | 0.4 | Yyn0/Dyn11 | 910 | 5290 | 0.85 | 4.0 / 6.0 |
| SCB14-1000/10-NX2 | 1000 | 6-11 | 0.4 | Yyn0/Dyn11 | 1205 | 7315 | 0.85 | 6.0 |
| SCB14-1600/10-NX2 | 1600 | 6-11 | 0.4 | Yyn0/Dyn11 | 1665 | 10555 | 0.85 | 6.0 |
| SCB14-2500/10-NX2 | 2500 | 6-11 | 0.4 | Yyn0/Dyn11 | 2450 | 15445 | 0.70 | 6.0 |
| Model (SCB18) | Rated Capacity (kVA) | HV (kV) | LV (kV) | Connection Group | No-Load Loss (W) @120°C | Load Loss (W) @120°C | No-Load Current (%) | Short-Circuit Impedance (%) |
| SCB18-30/10-NX1 | 30 | 6-11 | 0.4 | Yyn0/Dyn11 | 105 | 640 | 2.0 | 4.0 |
| SCB18-100/10-NX1 | 100 | 6-11 | 0.4 | Yyn0/Dyn11 | 230 | 1415 | 1.5 | 4.0 |
| SCB18-400/10-NX1 | 400 | 6-11 | 0.4 | Yyn0/Dyn11 | 570 | 3590 | 1.0 | 4.0 |
| SCB18-630/10-NX1 | 630 | 6-11 | 0.4 | Yyn0/Dyn11 | 775 | 5290 | 0.85 | 4.0 / 6.0 |
| SCB18-1000/10-NX1 | 1000 | 6-11 | 0.4 | Yyn0/Dyn11 | 1020 | 7315 | 0.85 | 6.0 |
| SCB18-1600/10-NX1 | 1600 | 6-11 | 0.4 | Yyn0/Dyn11 | 1415 | 10555 | 0.85 | 6.0 |
| SCB18-2500/10-NX1 | 2500 | 6-11 | 0.4 | Yyn0/Dyn11 | 2080 | 15445 | 0.70 | 6.0 |
(1) Dielectric Strength
Withstands power frequency voltage of 3 kV and lightning impulse voltage according to IEC 60076.
(2) Temperature Rise Limits
Designed for temperature rise limits compliant with insulation class F (≤100 K for windings).
(3) Partial Discharge
Typically <10 pC under 1.1 Um/√3 voltage, ensuring long insulation life.
(4) Noise Level
Optimized design ensures low noise, typically 10-15 dB below national standards (e.g., ≤55 dB for 630 kVA).
(5) Insulation Resistance
Remains ≥1000 MΩ even after 10 years of operation.
(6) Mean Time Between Failures
Exceeds 20,000 hours for most models.
(7) Design Life
>30 years under normal operating conditions.
Real-world feedback confirms the reliability and performance of our products.
"We installed six Jinhand SCB14-2000kVA dry-type transformers in our new data center three years ago. They have been running 24/7 without a single issue. The temperature rise is stable, and the remote monitoring feature via RS485 gives us great peace of mind. The promised efficiency is real—our PUE metrics improved."
"For our downtown hospital expansion, fire safety was paramount. Jinhand's SCB18 series with F1-class rating was the perfect fit. The factory provided excellent support during commissioning, and the noise level is so low that it doesn't disturb patients at all. Their on-time delivery was crucial for our tight construction schedule."
"We replaced aging oil-filled transformers in our coastal chemical plant with Jinhand's SCB14 units. After two years, we've measured a 12% reduction in transformer-related energy costs. More importantly, their corrosion-resistant epoxy casting has shown zero signs of degradation in our salty, humid environment."
Choosing Jinhand means gaining a partner committed to your project's success. We offer:
Our engineers analyze your load profile, site conditions, and grid parameters to recommend the optimal transformer model and configuration.
We can adjust voltage taps, protection class, connection group, and even integrate smart monitoring interfaces (temperature sensors, RS485 communication) to meet your specific needs, with design turnaround as fast as 3 days.
Witness comprehensive testing (no-load, load, temperature rise, partial discharge, insulation resistance) at our China factory before shipment. We provide detailed test reports.
We supply full technical datasheets, dimensional drawings, wiring diagrams, instruction manuals, and quality certificates.
Our experienced engineers can provide on-site supervision for installation and commissioning, ensuring correct setup and optimal performance.
We offer training programs for your technical staff covering daily inspection, troubleshooting, and basic maintenance procedures.
We manage professional export packaging, documentation, and coordinate shipping to ensure safe and timely delivery worldwide, with a 98% on-time delivery rate.
Our Dry Type Transformers are built to last:
High and low voltage coils are cast as a single unit using advanced vacuum epoxy resin casting technology, ensuring 100% insulation penetration, eliminating air bubbles, and providing exceptional resistance to short-circuit forces, vibration, and thermal cycling.
The use of high-quality, anti-aging epoxy resin with non-toxic flame retardants guarantees stable insulation performance over decades. Insulation resistance remains high (≥1000MΩ) even after 10+ years.
The fully encapsulated structure makes the transformer inherently resistant to moisture, dust, and mild corrosive agents. It can operate reliably in environments with up to 95% relative humidity.
Optimized electromagnetic design and high-grade silicon steel cores minimize losses and heat generation. Efficient natural (AN) or forced air (AF) cooling options ensure safe temperature rises even under full load.
All core components, including copper windings (conductivity ≥58 MS/m), silicon steel sheets, and cooling fans, are sourced from reputable suppliers and subjected to incoming inspection.
Our vertically integrated factory ensures quality at every step:
This core process ensures void-free insulation, maximizing dielectric strength and partial discharge resistance.
Computer-controlled winding machines ensure precise and uniform coil geometry, optimizing electromagnetic performance and minimizing stray losses.
We operate under an ISO 9001-certified system with up to 20 quality inspection links, from incoming raw material verification to 100% routine testing of every finished unit.
Our lab is equipped to perform comprehensive tests, including no-load and load loss measurement, temperature rise tests, partial discharge measurement, and impulse voltage tests.
Our R&D team continuously optimizes core and coil designs to reduce losses, lower noise, and improve overall efficiency.
Jinhand is committed to sustainability:
SCB14 and SCB18 series meet the latest GB 20052-2020 and IEC 60076 efficiency standards, contributing to national and global energy conservation goals.
We use RoHS and REACH-compliant epoxy resins and non-toxic flame retardants. The oil-free design eliminates soil and water contamination risks associated with oil leaks.
The higher efficiency of our transformers directly reduces CO2 emissions. For example, a SCB18-2500kVA unit can reduce annual carbon emissions by approximately 10 tons compared to a less efficient model.
Our optimized designs result in quiet operation, often 10-15 dB below national standards, contributing to a better indoor and urban acoustic environment.
Q1: What is the difference between the SCB14 and SCB18 series?
A: The primary difference is the energy efficiency level.SCB14 meets national Energy Efficiency Class 2 standards. SCB18 meets the higher Class 1 standards, featuring significantly lower no-load losses (e.g., 775W vs 910W for a 630kVA model) and offering greater long-term energy savings. Both maintain the same high safety and quality standards.
Q2: Can a Dry Type Transformer be installed indoors without a dedicated transformer room?
A: Yes, absolutely. One of the main advantages of a Dry Type Transformer is its oil-free, flame-retardant design (F1-class). It can be installed directly inside electrical rooms or even within the load center, provided there is adequate ventilation for cooling. No special oil pit or fire suppression system is required.
Q3: What routine maintenance does a Dry Type Transformer require?
A: Maintenance is minimal. Routine tasks typically involve:
Periodically cleaning dust from the enclosure and ventilation openings.
Inspecting all electrical connections for tightness.
Checking the functionality of temperature control devices and cooling fans.
A professional inspection including insulation resistance measurement every 2-3 years is recommended.
Choosing Jinhand means investing in safety, efficiency, and long-term value. Our Dry Type Transformers are engineered to provide decades of reliable, maintenance-free service for the most demanding indoor applications.
Contact Jinhand Electric Co., Ltd. Today for a Technical Consultation or Quotation!
