1000 KVA 12.47 KV To 480V Transformer-12.47/0.48 KV | USA 2025

Power your future with the safe and durable Three Phase Pad Mounted Transformer.

01 General

1.1 Project Description

1000 kVA three phase pad mounted transformer was delivered to USA in 2025. The rated power of the transformer is 1000 kVA with KNAN cooling. The high voltage is 12.47D kV with ±2*2.5% tapping range (NLTC), the low voltage is 0.48Y/0.277 kV, they formed a vector group of Dyn1.

This 1000kVA, three-phase, pad-mounted transformer serves as a critical power hub in modern urban commercial districts and high-density residential power distribution networks, tasked with the essential role of reliably converting 12.47kV medium voltage to 0.48kV low voltage. To address multiple challenges including limited urban space, stringent environmental and safety regulations, and the need for higher efficiency, it integrates a series of forward-thinking designs: its bushings employ a side-exit configuration, which optimizes space utilization and simplifies cable connections, thereby enhancing the safety and convenience of installation and maintenance; it is filled with environmentally friendly FR3® natural ester insulating fluid, which significantly elevates the equipment’s fire safety rating thanks to a fire point of up to 360°C, while its biodegradable nature completely eliminates the risk of persistent environmental contamination; in terms of energy efficiency, it strictly adheres to the rigorous U.S. Department of Energy (DOE) standards, achieving minimized no-load and load losses. By virtue of these features, the transformer delivers significant and quantifiable results-compared to conventional units, its total losses can be reduced by 15-25%, directly translating to annual savings of thousands of kilowatt-hours; the superior insulating properties of FR3 fluid extend the expected service life to 2-3 times that of standard transformers, consequently reducing the total cost of ownership by over 20% throughout its lifecycle, and successfully cutting its carbon footprint by approximately 70%. It ultimately stands as an ideal solution for empowering users to build a modern, resilient, economical, and green-sustainable electrical distribution system.

1.2 Technical Specification

1000 kVA pad mounted transformer specifications type and data sheet

1.3 Drawings

1000 kVA pad mounted transformer diagram drawing and size.

02 Manufacturing

2.1 Core

Engineered with a precision-built, domain-refined silicon steel core, our transformer achieves exceptionally low noise levels and minimal stray losses. This robust design ensures reliable performance in noise-sensitive environments and surpasses DOE efficiency standards, providing unmatched operational stability and a lower total cost of ownership by extending service life and reducing failure risk.

2.2 Winding

For facility managers in high-ambient temperature environments, our high-voltage winding employs precision-layer aluminum foil with Nomex inter-layer insulation. This robust construction creates superior heat dissipation channels, reducing hot-spot temperatures by up to 15°C versus standard designs. This directly extends the insulation’s thermal life by over 50,000 hours, dramatically cutting the risk of outage and lowering lifetime maintenance costs, ensuring your critical operations remain powered without interruption.

2.3 Tank

Our tank features an optimized corrugated fin design that increases the cooling surface area by 25% versus conventional tanks. This superior thermal management system, combined with the FR3 fluid, keeps the hot-spot temperature 10-15°C lower, directly increasing thermal life by a factor of two. This results in a tangible 3-5% increase in overload capacity and a significant extension of the transformer’s operational lifespan, providing clients with a critical safety margin during peak demand and a lower total cost of ownership through enhanced energy efficiency and durability.

2.4 Final Assembly

03 Testing

Tailored to commercial and industrial customers seeking a cost-effective, compliant, and durable outdoor power solution, this 1000kVA three-phase pad-mounted transformer was put through comprehensive testing to overcome challenges of humidity, voltage instability, and long-term leakage, adhering to globally recognized IEEE standards. Quantifiable results demonstrate its superiority: 99.48% efficiency (outperforming the guaranteed minimum), 1.223kW no-load loss (below the 1.3kW guarantee), 6.161kW load loss at 85℃, 5.70% short-circuit impedance, and voltage ratio deviations as low as -0.02% (well within ±0.5% tolerance). It also achieved flawless safety and durability performance: 24-hour static pressure leak test at 20kPa (no leakage), 10kV/60s LV withstand voltage, and insulation resistance ranging from 1.93 to 3.34GΩ.

04 Packing and Shipping

4.1 Packing

This three-phase pad-mounted transformer is packaged in a heavy-duty plywood crate with metal reinforcements, tackling challenges like transit vibrations, moisture intrusion, and mechanical impacts during long-haul shipping. Compliant with ISTA 3A international packaging standards, it features clear forklift handling symbols and eco-recyclable markings: 1.2m drop-test resistance without structural damage, IP54 dust/water protection, and a 0% transit damage rate. Our rigorous pre-shipment load validation and reinforced design reduce delivery delays and replacement costs by 90%, ensuring you receive the transformer intact and on schedule, directly addressing your need for hassle-free, reliable logistics.

4.2 Shipping

For your three-phase pad mounted transformer, our DDP shipping delivers a hassle-free end-to-end solution tailored to your peace of mind-we handle every detail from factory loading to your designated site, including all customs clearance, taxes, and last-mile delivery. Unlike other providers that leave you navigating logistical headaches or hidden costs, we use customized heavy-duty packaging to protect the transformer’s precision components during transit, partner with premium logistics teams specialized in heavy electrical equipment, and offer real-time shipment tracking so you always know your asset’s location. Our decades of experience in global transformer logistics ensure on-time delivery, zero unexpected fees, and full compliance with international shipping standards-letting you focus on installation and operations, not logistical hurdles.

05 Site And Summary

For decades, our three-phase pad mounted transformers have earned the trust of industrial, commercial, and utility clients worldwide-with feedback like “stable operation for 5+ years without a single fault” and “seamless integration that cut our energy costs by 12%” echoing across sectors. Beyond robust performance, efficiency, and compliance with global standards, what truly sets us apart is our unwavering focus on your success: every unit is engineered to withstand harsh environments, simplify installation, and deliver long-term reliability that eliminates costly downtime. When you choose our transformer, you’re not just investing in equipment-you’re partnering with a team backed by thousands of satisfied customers who rely on us for consistent quality, responsive support, and solutions that grow with their needs.