TiraThai, a specialized sub-brand of Jinguan Electric dedicated to transformer and electrical equipment innovations, proudly presents the ZGS Series Liquid-Filled Pad Mounted Transformers. These robust, ground-mounted units are engineered for seamless underground power distribution, featuring a compartmentalized cabinet structure that separates operational elements for enhanced safety and accessibility. The front section houses high- and low-voltage operating compartments, including high-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 compartment contains the fuel tank body, heat sink, transformer windings, iron core, high-voltage load switch, and protective fuse—all immersed in the fuel storage tank for optimal cooling and insulation.

Jinguan Electric, founded in 1979 as a high-tech enterprise in Nanyang City, Henan Province, China, has evolved from pioneering arrester production 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 transformer solutions. This sub-brand channels Jinguan Electric's expertise into customizable, eco-friendly pad-mounted transformers that prioritize reliability, efficiency, and compliance with international standards such as IEEE/ANSI, CAN/CSA, and DOE. Certified by UL, cUL, CSA, and SGS, the ZGS Series supports loop feed or radial feed configurations, making it ideal for modern infrastructure demands.

The ZGS Series offers flexible voltage ratings and power capacities, from compact 100kVA units for residential feeders to high-capacity 5000kVA models for industrial substations. With customizable primary voltages (e.g., 34.5kV to 4.16kV) and secondary options (e.g., 208GrdY/120V 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"—embodies Jinguan Electric's commitment to precision engineering, ensuring the units withstand harsh environmental conditions while minimizing footprint and installation complexity. Whether deployed in urban vaults or remote utility sites, these transformers provide uninterrupted power flow, backed by rigorous quality controls.

Transformer Model: ZGS Series Primary Voltage Ratings: 34.5-4.16kV (Customizable) Secondary Voltage Ratings: 208GrdY/120V to 600V (Customizable) Rated Capacity: 100-5000kVA (Customizable) Rated Frequency: 50/60Hz

This comprehensive configurability positions TiraThai's Liquid-Filled Pad Mounted Transformers as a cornerstone for efficient, future-proof power distribution.

Key Features and Engineering Excellence

TiraThai's ZGS Series Liquid-Filled Pad Mounted Transformers incorporate advanced features that enhance safety, performance, and longevity in demanding applications. The compartmentalized design isolates high-voltage components from low-voltage operations, reducing arc flash risks and simplifying routine inspections. High-voltage sections include robust load switches for sectionalizing, no-load tap changers (±2×2.5% range) for voltage regulation, and plug-in fuses for fault protection, all integrated with pressure relief valves to vent internal pressures safely. Oil temperature and level gauges provide real-time monitoring, while drain valves facilitate easy oil sampling and maintenance without disassembly.

The rear fuel tank, constructed from corrosion-resistant steel, houses the transformer core and windings immersed in high-grade mineral oil for superior dielectric strength and natural convection cooling (ONAN), with optional forced air (ONAF) for higher loads. Connection types like Dyn11/YNyn0 ensure phase compatibility, while customizable BIL (Basic Impulse Level) ratings protect against surges. Flame-retardant seals and explosion-proof enclosures meet stringent safety norms, preventing leaks and containing faults. Jinguan Electric's automated manufacturing—featuring vacuum oil-filling and robotic welding—guarantees leak-free assembly, with eco-friendly oil options for reduced environmental impact.

Compared to overhead alternatives, TiraThai pad-mounted units offer up to 30% smaller footprints, vandal-resistant enclosures, and noise levels below 60dB for urban compatibility. Optional accessories like surge arresters and remote telemetry enable smart grid integration, supporting predictive maintenance. These features not only comply with IEEE/ANSI and CAN/CSA but exceed them, delivering 99.9% uptime and energy efficiency that aligns with DOE standards for sustainable power.


Technical Specifications

TiraThai's ZGS Series transformers are precision-engineered for reliability, with baseline specs customizable to project needs. Below is an expanded table of key parameters, validated through Jinguan Electric's certified labs and compliant with IEEE/ANSI, CAN/CSA, and DOE standards.

ParameterSpecification Details
Rated Capacity (kVA)100, 500, 1000, 1500, 2000, 2500, 3000, 5000 (custom up to 7500)
Primary Voltage (kV)34.5 / 19.92 / 13.8 / 13.2 / 12.47 / 7.2 / 4.16 (Dyn11 connection, customizable)
Secondary Voltage (kV/V)208GrdY/120 / 416GrdY/240 / 480GrdY/277 / 600GrdY/347 / 220Y/127 / 480 / 415 / 600 (customizable)
H.V. Tap Range±2×2.5% or ±5% (no-load, NLTC standard; OLTC optional)
Connection TypeDyn11 / YNyn0 (customizable)
TypeLoop Feed / Radial Feed
BIL (kV)150-200 (customizable for surge protection)
Frequency (Hz)50/60
No-Load Loss (W)Optimized per DOE (e.g., 1000kVA: 1500)
Load Loss (W, at 75°C)Optimized (e.g., 1000kVA: 9000, copper windings)
Impedance Voltage (%)4-8% (capacity-dependent)
Insulation ClassClass A (105°C rise)
Cooling MethodONAN; ONAF optional for higher loads
Noise Level (dB, 1m)≤60 at full load
Enclosure ProtectionIP54 standard (weatherproof, tamper-resistant)
Oil Volume (L, approx. 1000kVA)1500-2000 (biodegradable mineral oil optional)
Weight (kg, approx. 1000kVA)Total: 3000-4000 (core & windings: 1500)
Short-Circuit Withstand40kA / 2s (integrated fuses)

These metrics ensure interoperability with global utilities, with full type testing for thermal cycling, dielectric strength, and seismic resilience (up to 0.5g). Custom options include amorphous cores for 70% loss reduction.

Applications and Real-World Performance

TiraThai's ZGS Series Liquid-Filled Pad Mounted Transformers are versatile, tailored for space-constrained and high-reliability environments. In Battery Energy Storage Systems (BESS), they provide stable voltage regulation for lithium-ion arrays, minimizing harmonics during charge/discharge cycles. Data centers rely on their tamper-resistant design for uninterrupted UPS feeds, supporting high-density computing with low-loss efficiency. Oil & gas operations deploy them in remote wellheads, where weatherproof enclosures withstand corrosive atmospheres and extreme temperatures.

Renewable energy projects, such as wind and solar farms, integrate these transformers for step-up/step-down in collector substations, with loop feed options enabling redundant paths for grid stability. EV charging stations benefit from customizable secondaries matching fast-charger demands, facilitating urban rollout without overhead lines. Utility networks use them for underground residential distribution (URD), reducing visual clutter and enhancing safety in pedestrian areas.

Field performance from Jinguan Electric installations shows MTBF exceeding 100,000 hours, with energy savings of 10-15% over legacy models, and seamless compliance for exports to North America and beyond.

Why Choose TiraThai by Jinguan Electric?

As Jinguan Electric's sub-brand, TiraThai delivers pad-mounted excellence backed by 45+ years of innovation. Our ZGS Series offers unmatched customization for voltage/frequency variances, UL/CSA certifications, and sustainable features like biodegradable oils. Jinguan Electric's ecosystem ensures rapid prototyping and global logistics, with 20-25% lower TCO than competitors.

Expanded FAQ Section

How are TiraThai transformers shipped internationally? Shipped via sea, rail, or truck for overseas 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 feed types are available? Loop feed for redundancy or radial feed for simplicity, customizable per application needs.

Are they suitable for renewables? Absolutely—optimized for wind/solar with low harmonics and overload capacity for variable generation.

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 IEEE/ANSI, CAN/CSA, and DOE compliance for global excellence.

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