Three-Phase Pad-Mounted Transformer
IEEE compliant and fluid-cooled. Engineered to provide high-capacity, reliable power for Data Centers and BESS expansions.
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yun-sen Three Phase IEEE C57.12.34 Transformer units are explicitly engineered to withstand severe industrial motor inrush currents, high-density compute workloads, and the complex bi-directional power flows of BESS. Leveraging our authorized premium manufacturing network, we execute deliveries within 9 weeks while maintaining strict adherence to NEC and IEEE standards. Every unit is engineered as a DOE 2016 Compliant Pad-Mounted Transformer, ensuring full alignment with federal efficiency requirements. Available in capacities up to 10 MVA and equipped with holistic cULus official certifications (e.g., UL-CA-2228369-0), ensuring the equipment arrives on-site ready to drop in place and seamlessly pass Authority Having Jurisdiction (AHJ) inspections.
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High-Efficiency & Energy SavingsConstructed with 100% pure copper windings and precision core architectures to strictly maintain a 65°C temperature rise. As a certified DOE 2016 Pad-Mounted Transformer platform, this design effectively minimizes energy losses during continuous, heavy-duty operational cycles, maximizing core efficiency and driving down the Total Cost of Ownership (TCO).
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Rigorous Testing & Comprehensive CertificationAll high-capacity units undergo exhaustive 100% Factory Acceptance Testing (FAT). Equipment arrives at the job site bearing factory-applied NRTL compliance labels, effectively eliminating on-site regulatory risks.
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Eco-Friendly & Fire-Resistant OptionsAvailable with an FR3™ natural ester dielectric fluid upgrade (KNAN/KNAF cooling). This high-fire-point fluid significantly enhances environmental safety and fire resistance while delivering exceptional overload capabilities.
A deterministic delivery schedule ensures power infrastructure never bottlenecks server rack deployment, bringing your facility online faster.
Engineered architectures specifically designed to handle solar and inverter harmonic distortion, providing critical step-up support for developers to meet their Power Purchase Agreement (PPA) deadlines.
Over-engineered pure copper windings and superior Short-Circuit Current Ratings (SCCR) protect critical production lines from disruptive voltage sags.
Standardized with lifting lugs, external primary bushings, and pre-installed surge arresters to significantly simplify on-site integration and reduce contractor field labor cost
Technical Specifications
| PARAMETER | VALUE |
|---|---|
| Capacity Range | 400 kVA up to 10,000 kVA (10 MVA) |
| Primary Voltage | 38.5kV, 13.8kV, 11kV (Custom voltage configurations available) |
| Secondary Voltage | 12.47kV, 24.94kV, 2400V, 4160V (Low-Voltage steps: 208V, 240V, 440V, 480V, 600V) |
| Winding Material | 100% Copper |
| Cooling Class & Temp Rise | ONAN / ONAF |
| Temperature Rise Limit | 65°C |
| Impedance | 7% – 10.5% |
| Enclosure & Finish | NEMA 3R rated, utilizing ANSI C57.12.28 compliant anti-corrosion coatings |
| Coating Standard | ANSI C57.12.28 compliant anti-corrosion coatings |
| Official Certification Files | UL-CA-2228369-0, UL-US-2402197-0, UL-US-2586027-0 |
| Reference Dimensions | 144 in (L) x 84 in (W) x 96 in (H) |
| Reference Weight | 38,000 lbs (Fluid capacity: 1,200 gallons) |
| Lead Time & Warranty | 9-Week Delivery |
| Warranty | 36-Month Warranty |
Dedicated Engineering Support
Powering high-load applications requires precise planning. Send your exact single-line diagram (SLD) to our heavy-power engineering team so we can confirm breaker coordination and compliance requirements.
Our team will respond within 24 hours.