TiraThai, a specialized sub-brand of Jinguan Electric focused on transformer and electrical equipment innovations, proudly introduces the SG(B) Series Non-Encapsulated Dry-Type Transformers. These open-type units, also known as OVDT (Open Ventilation Dry-Type), feature windings manufactured through a vacuum pressure impregnation (VPI) process, creating a non-encapsulated structure that ensures exceptional safety and performance. With an insulation heat resistance grade of H (system temperature 180°C, reference temperature 145°C, winding temperature rise 125K), the SG(B) series is designed for demanding applications where fire safety and reliability are paramount, offering a robust alternative to traditional oil-immersed transformers.
Jinguan Electric, founded in 1979 as a high-tech enterprise in Nanyang City, Henan Province, China, has evolved from pioneering arrester manufacturing to a global leader in high-voltage transmission and distribution equipment. Embracing Industry 4.0 principles, Jinguan Electric drives core competitiveness through continuous innovation, with TiraThai serving as its premier brand for non-encapsulated dry-type transformer solutions. This sub-brand leverages Jinguan Electric's rigorous quality control and advanced manufacturing to deliver SG(B) transformers that comply with international standards, including IEC 60076, GB/T 10228-1997, and IEEE C57.12.01. Certified by UL, CUL, CCC, CQC, CTQC, CE, and SGS, these units uphold ISO9001 (quality), ISO14001 (environmental), and ISO45001 (health & safety) management systems, ensuring superior performance and sustainability.
The SG(B) series supports customizable voltage ratings, frequencies of 50/60Hz, and capacities tailored to specific loads, with the VPI process enhancing insulation strength and reducing partial discharge. Operating reliably in ambient temperatures from -15°C to +40°C and humidity up to 95% RH, these transformers facilitate unmanned operation with minimal maintenance. TiraThai's philosophy—"dig 100 meters deep in 1 meter of space"—reflects Jinguan Electric's commitment to precision, delivering compact, durable solutions that enhance grid resilience for critical infrastructure worldwide.
Transformer Model: SG(B) Series (OVDT) Insulation Grade: H-Class (180°C System) Frequency: 50/60Hz
This innovative design makes TiraThai's SG(B) Series Non-Encapsulated Dry-Type Transformers a cornerstone for safe, efficient power distribution.
Key Features and Engineering Excellence
TiraThai's SG(B) Series Non-Encapsulated Dry-Type Transformers are engineered for outstanding safety and reliability, featuring an open ventilation structure that promotes natural air cooling (AN) while minimizing combustible materials. The VPI process impregnates windings with epoxy resin under vacuum pressure, creating a durable, non-encapsulated barrier that resists cracking, reduces partial discharge, and ensures insulation integrity over time. With only trace amounts of non-toxic, self-extinguishing materials, the transformers exhibit excellent fire resistance—producing minimal smoke under high temperatures and preventing flame propagation, making them ideal for high-risk areas.
The H-class insulation system (180°C) supports temperature rises of 125K without degradation, enabling strong overload capacity (up to 120% short-term) and operation in humid or polluted environments. The coil structure, with optimized turns and vacuum curing, enhances mechanical strength and heat dissipation, eliminating the need for oil tanks or fire suppression systems. Jinguan Electric's automated production—featuring robotic winding, VPI chambers, and AI-driven inspections—guarantees defect-free assembly, with customizable enclosures (IP20 to IP54) for dust and water resistance.
Compared to encapsulated models, TiraThai SG(B) units offer easier maintenance and 20-30% better heat dissipation, reducing operational costs by 15-20% through lower losses. Optional features like integrated temperature sensors and forced air cooling (AF) enable predictive maintenance and enhanced performance. These attributes not only meet but surpass GB/T10228-1997 and IEC 60076 standards, providing users with a transformer that balances safety, efficiency, and environmental responsibility.
Technical Specifications
TiraThai's SG(B) Series Non-Encapsulated Dry-Type Transformers are precision-engineered for versatility, with baseline specs expandable through customization. Below is a detailed table of key parameters, based on Jinguan Electric's validated testing and compliant with GB/T10228, IEC 60076, and IEEE C57 standards.
| Parameter | Specification Details |
|---|---|
| Rated Capacity (kVA) | Customizable (e.g., 100-2500) |
| Primary Voltage (kV) | Up to 35 (Dyn11, customizable) |
| Secondary Voltage (kV) | 0.4-10 (customizable) |
| Frequency (Hz) | 50/60 |
| Insulation Grade | H-Class (System: 180°C; Reference: 145°C; Rise: 125K) |
| Winding Process | Vacuum Pressure Impregnation (VPI) |
| Structure | Non-Encapsulated (OVDT, Open Ventilation) |
| No-Load Loss (W) | Optimized (20-30% below standards) |
| Load Loss (W, at 75°C) | Optimized (e.g., 1000kVA: 7000) |
| Impedance Voltage (%) | 4-6% (capacity-dependent) |
| Cooling Method | AN (Natural Air); AF optional |
| Noise Level (dB, 1m) | ≤55 |
| Enclosure Protection | IP20 standard; IP54 optional |
| Efficiency (%) | >98 at full load |
| Short-Circuit Withstand | 25x rated current / 2s |
| Operating Temperature (°C) | -15 to +40 |
| Operating Humidity (% RH) | ≤95 (non-condensing) |
| Weight (kg, approx. 1000kVA) | 1200-1600 |
These values ensure compatibility with global grids, with full routine testing for dielectric strength, thermal rise, and partial discharge. Custom enhancements include H-class upgrades for higher temperatures.
Applications and Performance Benefits
TiraThai's SG(B) Series Non-Encapsulated Dry-Type Transformers are ideal for key areas with high fire protection requirements and large loads, such as high-rise buildings, airports, subways, metallurgical petrochemical plants, and shopping centers. In high-rises, they power elevators and HVAC with fireproof, low-smoke design. Airports and subways use them for critical supply, where self-extinguishing properties ensure safety without extensive suppression.
Metallurgical and petrochemical facilities benefit from overload capacity and heat dissipation for continuous operation. Jinguan Electric's deployments yield 99.95% uptime, 15-20% energy savings, and MTBF over 50,000 hours, fostering resilient networks.
Why Choose TiraThai by Jinguan Electric?
TiraThai, as Jinguan Electric's sub-brand, delivers non-encapsulated excellence backed by 45+ years of innovation. Our SG(B) series offers VPI reliability, H-class insulation, and full customization, surpassing standards. With UL/CE certifications, we ensure 20% lower TCO for safe, efficient power.
Expanded FAQ Section
How are TiraThai transformers shipped internationally? Shipped via sea, rail, or truck for global delivery. Main body in bulk packaging for stability, accessories in wooden cases to withstand transit stresses.
Can TiraThai products be customized? Yes, tailored for voltage, frequency, and regional needs through Jinguan Electric's engineering team.
What warranty do you provide? At least two years comprehensive coverage for defects, performance, and materials, with extensions available.
Is Factory Acceptance Testing (FAT) supported? Standard: Full electrical, thermal, and mechanical tests per unit, with client witnessing in-person or remotely.
Do you provide after-sales engineering support? Yes, Jinguan Electric deploys engineers for on-site installation, commissioning, troubleshooting, and audits.
What sets non-encapsulated apart? Open ventilation for better heat dissipation, VPI for low discharge, and fireproof materials for safety.
Are they suitable for high-rises? Yes, compact, low-smoke, self-extinguishing design for fire-safe urban applications.
Certifications and Quality Assurance
TiraThai products, supplied through Jinguan Electric, hold UL, CUL, CCC, CQC, CTQC, CE, and SGS certifications, plus mandatory approvals. Systems certified to ISO9001 (quality), ISO14001 (environment), and ISO45001 (health & safety), ensuring GB/T10228, IEC 60076, and IEEE C57 compliance for global excellence.
Contact Us Today
Power your infrastructure with TiraThai's SG(B) Series Non-Encapsulated Dry-Type Transformers. For quotes or consultations:
- WhatsApp: +8613037600603
- Email: [email protected] or [email protected]
Our team responds within 24 hours.
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