TiraThai, a specialized sub-brand of Jinguan Electric focused on transformer and electrical equipment innovations, proudly introduces the ZGS Series Single Phase Liquid-Filled Pad Mounted Transformers. These compact, ground-mounted units are designed for efficient single-phase power distribution in space-constrained environments, featuring a compartmentalized structure that enhances safety and accessibility. The front compartment includes high- and low-voltage terminals, load switches, no-load voltage regulating tap changers, plug-in fuses, pressure relief valves, oil temperature and level gauges, and oil drain valves. The rear section houses the fuel tank, heat sink, transformer windings, iron core, high-voltage load switch, and protective fuse, all immersed in high-grade mineral oil for optimal cooling and insulation.

Jinguan Electric, founded in 1979 as a high-tech enterprise in Nanyang City, Henan Province, China, has progressed from its origins in arrester manufacturing to a global leader in high-voltage transmission and distribution equipment. Integrating Industry 4.0 technologies, Jinguan Electric emphasizes core competitiveness through continuous innovation, with TiraThai serving as its dedicated brand for advanced transformer solutions. This sub-brand channels Jinguan Electric's expertise into reliable, eco-friendly pad-mounted transformers that exceed ANSI/IEEE, NEMA, and DOE standards. Certified by UL, cUL, CSA, and SGS, the ZGS Series supports loop feed or radial feed configurations, ideal for civil applications requiring single-phase power.

The ZGS Series offers versatile voltage ratings and capacities, from 50kVA for small residential setups to 500kVA for light commercial loads. With customizable primary voltages (e.g., 34.5kV to 7.2kV) and secondary options (e.g., 120/240V to 600V), these transformers adapt to diverse global grids, including 50/60Hz frequencies. TiraThai's design philosophy—"dig 100 meters deep in 1 meter of space"—reflects Jinguan Electric's commitment to precision, ensuring the units withstand environmental stresses while minimizing footprint and installation time. Whether powering homes or parks, these transformers deliver uninterrupted single-phase supply, backed by rigorous quality assurance.

Transformer Model: ZGS Series (Single Phase) Primary Voltage Ratings: 34.5kV/19.92kV, 24.94kV/14.4kV, 13.8kV/7.957kV, 13.2kV/7.62kV, 12.47kV/7.2kV (Customizable) Secondary Voltage Ratings: 120/240V, 240/480V, 347V, 600V (Customizable) Rated Capacity: 50-500kVA (Customizable) Rated Frequency: 50/60Hz

This flexibility positions TiraThai's Single Phase Liquid-Filled Pad Mounted Transformers as a go-to solution for efficient, future-oriented power distribution in residential and light-duty scenarios.

Key Features and Engineering Excellence

TiraThai's ZGS Series Single Phase Liquid-Filled Pad Mounted Transformers are engineered with premium features that prioritize safety, efficiency, and durability. The ISO 9001-certified quality system ensures compliance with DOE energy efficiency standards, surpassing ANSI/IEEE and NEMA requirements. Tank coatings exceed IEEE Std C57.12.28™-2005 and IEEE Std C57.12.29™-2005 (for stainless steel variants), providing superior corrosion resistance. Full enclosure integrity meets IEEE Std C57.12.28™-2005, with tamper strips of noncorrosive material and a crowned tank to prevent water pooling.

Safety elements include a pressure relief device for fault venting, fluid fill and drain provisions for easy servicing, and a laser-engraved nameplate for clear identification. The floating lock pocket simplifies alignment during installation, while decal bushing designations and welded domed tank cover enhance usability and security. Hinged doors with stainless steel hinge pins and barrels facilitate access, and a ground strap from X2 to tank ground ensures safe earthing. High-voltage bushing wells accommodate 200A dead-front elbow connectors, with HV bushing wells for robust connectivity.

The Delta/Wye connection type supports both loop feed (for redundancy) and radial feed (for simplicity) configurations, with BIL ratings of 30-150kV for surge protection. Jinguan Electric's advanced manufacturing—featuring vacuum oil-filling and automated welding—delivers leak-free units with optional biodegradable oils for environmental compliance. Compared to three-phase models, TiraThai's single-phase variants offer a smaller footprint (up to 40% less space) and lower noise (under 55dB), ideal for noise-sensitive areas. Optional accessories like surge arresters and remote monitoring integrate seamlessly with smart grids, promoting predictive maintenance and extended service life beyond 30 years.

These features not only align with global benchmarks but elevate them, providing up to 15% energy savings and vandal-resistant designs for secure urban deployments.

Technical Specifications

TiraThai's ZGS Series Single Phase transformers are precision-crafted for reliability, with specs customizable to client requirements. Below is a detailed table of key parameters, validated through Jinguan Electric's certified testing and compliant with ANSI, IEEE, DOE, cUL, and UL standards.

ParameterSpecification Details
Rated Capacity (kVA)50, 100, 167, 250, 333, 500 (custom up to 750)
Primary Voltage (kV)34.5/19.92, 24.94/14.4, 13.8/7.957, 13.2/7.62, 12.47/7.2 (customizable)
Secondary Voltage (V)120/240, 240/480, 347, 600 (customizable)
H.V. Tap Range±2×2.5% (no-load, NLTC; OLTC optional)
Connection TypeDelta/Wye (customizable)
TypeLoop Feed / Radial Feed
BIL (kV)30-150 (customizable for surge protection)
Frequency (Hz)50/60
No-Load Loss (W)Optimized per DOE (e.g., 100kVA: 500)
Load Loss (W, at 75°C)Optimized (e.g., 100kVA: 1500, copper windings)
Impedance Voltage (%)2-4% (capacity-dependent)
Insulation ClassClass A (105°C rise)
Cooling MethodONAN; ONAF optional
Noise Level (dB, 1m)≤55 at full load
Enclosure ProtectionIP54 (weatherproof, tamper-resistant)
Oil Volume (L, approx. 100kVA)300-500 (mineral or biodegradable)
Weight (kg, approx. 100kVA)Total: 800-1200 (core & windings: 400)
Short-Circuit Withstand12kA / 2s (integrated fuses)

These metrics facilitate easy integration with underground systems, with full type testing for thermal performance, dielectric strength, and seismic resilience (up to 0.3g). Custom options include amorphous cores for enhanced efficiency.

Applications and Real-World Performance

TiraThai's ZGS Series Single Phase Liquid-Filled Pad Mounted Transformers are optimized for civil and light-duty applications where single-phase power is essential. In residential areas and single-family houses, they power household appliances, lighting, and EV chargers from underground feeds, offering a discreet, overhead-free alternative that blends into landscapes. Hotels and parks deploy them for localized distribution, supporting guest amenities and outdoor facilities with minimal visual impact and high reliability.

Underground distribution systems in urban neighborhoods benefit from the compact, tamper-resistant design, enabling safe vault installations that withstand pedestrian traffic and weather extremes. In emerging markets, these transformers facilitate rural electrification for small communities, providing efficient step-down from medium-voltage lines to 120/240V outlets for homes and farms. Renewable tie-ins, such as rooftop solar for single homes, leverage customizable taps to stabilize outputs, promoting green energy adoption.

Performance data from Jinguan Electric deployments indicates MTBF over 80,000 hours, with energy efficiency yielding 10-20% savings in low-load scenarios, and seamless compliance for North American and global utilities.

Why Choose TiraThai by Jinguan Electric?

As Jinguan Electric's sub-brand, TiraThai excels in single-phase pad-mounted solutions, inheriting 45+ years of innovation. Our ZGS Series provides superior customization for voltage/feed types, UL/cUL/CSA certifications, and sustainable oils. Jinguan Electric's integrated supply chain ensures on-time delivery and 20% lower TCO, outperforming competitors in residential reliability.

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 protect against transit impacts.

Can TiraThai products be customized? Yes, tailored for voltage, frequency, feed type, and regional standards 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, training, troubleshooting, and audits.

What makes them suitable for residential use? Compact size, low noise, and tamper-resistant enclosures ensure safe, unobtrusive power for homes and parks.

Are eco-friendly options available? Yes, including biodegradable oils and recyclable tanks, compliant with DOE for sustainable deployments.

Certifications and Quality Assurance

TiraThai products, supplied through Jinguan Electric, hold UL, cUL, CSA, SGS, CCC, CQC, CTQC, and CE certifications, plus mandatory approvals. Systems certified to ISO9001 (quality), ISO14001 (environment), and ISO45001 (health & safety), ensuring ANSI, IEEE, DOE, and NEMA compliance for global excellence.

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