Pad-Mounted Transformers: Where Durable Engineering Meets Smart Distribution.
01 General
1.1 Project Description
2000 kVA three phase pad mounted transformer was delivered to USA in 2025. The rated power of the transformer is 2000 kVA with KNAN cooling. The high voltage is 33.26GrdY/19.203 kV with ±2*2.5% tapping range (NLTC), the low voltage is 0.48Y/0.277 kV, they formed a vector group of YNyn0.
Tailored for solar, energy storage, commercial, and industrial distribution scenarios, SCOTECH’s cooper power systems pad mounted transformers combines optimized performance and user-centric design to meet diverse on-site needs. Its 3-phase 5-limb core and DOE-compliant efficiency maximize energy utilization, a critical advantage for renewable energy systems where every watt counts. The use of FR3 fluid eliminates fire hazards and environmental risks, making it the go-to choice for installations near residential areas, data centers, and green energy projects. Built-in surge arresters shield the transformer from voltage spikes- a must-have feature for outdoor pad-mounted setups exposed to unpredictable weather. The side-mounted meter cabinet streamlines on-site operations, from load monitoring to maintenance checks, while the sleek RAL 9003 powder-coated white finish resists UV radiation, rust, and chemical corrosion, ensuring long-term aesthetics and functionality. Whether for grid-tied solar farms or urban commercial hubs, this transformer delivers seamless, sustainable power distribution.
1.2 Technical Specification
2000 kVA cooper power systems pad mounted transformers specifications type and data sheet
| Delivered to | USA |
| Year | 2025 |
| Type | Pad mounted transformer |
| Standard | IEEE Std C57.12.34-2022 |
| Rated Power | 2000 kVA |
| Frequency | 60HZ |
| Phase | 3 |
| Feed | Loop |
| Front | Dead |
| Cooling Type | KNAN |
| Primary Voltage | 33.26GrdY/19.203kV |
| Secondary Voltage | 0.48Y/0.277 kV |
| Winding Material | Aluminum |
| Vector Group | YNyn0 |
| Impedance | 5.75% |
| Efficiency | 99.51% |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5% |
| No Load Loss | 1.95 kW |
| On Load Loss | 13.15 kW |
1.3 Drawings
2000 kVA pad mounted transformer diagram drawing and size.
02 Manufacturing
2.1 Core
| The iron core of the cooper power systems pad mounted transformers is constructed with high-quality laminated cold-rolled silicon steel sheets, designed to minimize eddy current and hysteresis losses. It forms the transformer’s magnetic circuit for efficient flux conduction, provides mechanical support for the windings, and features proper grounding to ensure safe, stable operation with optimal energy efficiency. |  |
2.2 Winding
 | The coil (winding) of the cooper power systems pad mounted transformers is made of copper/aluminum conductors wound into high-voltage (HV) and low-voltage (LV) sections, wrapped in robust insulating materials (like the laminated paper) for electrical isolation. Wound around the core, it complies with IEEE insulation/thermal standards (adapted to the liquid-immersed environment), ensures mechanical stability against installation/operational stresses, and enables efficient voltage conversion and power transmission. |
2.3 Tank
| The tank of a cooper power systems pad mounted transformers is a welded, sealed steel enclosure designed for outdoor, ground-level installation. It houses the core and coil assembly and is filled with either mineral oil or a less-flammable dielectric fluid for insulation and cooling. The tank is robust and tamper-resistant, with a low-profile, typically ribbed or corrugated design for increased strength and heat dissipation. All live parts are securely enclosed within, while external, lockable compartments provide access to primary and secondary cable connections, bushings, and protective devices, ensuring safety for the public and utility personnel. |  |
2.4 Final Assembly
 | The active part (core assembly) of the cooper power systems pad mounted transformers in the image is the integrated core component: it consists of three-phase insulated windings (coiled and wrapped in insulating material) mounted on the laminated iron core, paired with insulated lead wires (bundled for organization) and a metal support frame. This assembly is fixed and insulated to ensure stable magnetic-electric coordination between the core and windings, while the leads reserve interfaces for connecting external components, readying it for installation into the transformer tank-all complying with electrical insulation and mechanical stability standards. |
03 Testing
Pad-mounted transformers undergo a series of rigorous tests to ensure reliability and safety. These include routine tests on every unit, such as insulation resistance measurement, turns ratio tests, polarity verification, and no-load/loss measurements. Additionally, they are subjected to dielectric tests, including applied voltage and induced potential tests, to verify insulation integrity. All units must also pass mechanical and operational checks of accessories like tap changers, as well as final control checks. Type tests, including temperature rise and short-circuit withstand tests, are performed on representative units to validate the design.
04 Packing and Shipping
4.1 Packing
| The packaging of cooper power systems pad mounted transformers adheres to international standards and project-specific requirements, using fumigated wooden cases or reinforced steel frames with internal shockproof buffers (foam/rubber) to secure the tank, bushings, and accessories. It includes sealed protection against moisture/rust, standardized labeling (warning signs, product info, “Keep Upright”/”Shockproof” marks) affixed per specified positions, and secure strapping for stability during transit, ensuring the unit remains intact until delivery. |  |
4.2 Shipping
 | The DDP transportation of cooper power systems pad mounted transformers requires the seller to take full responsibility for robust, shockproof, and moisture-proof packaging (protecting core, windings, tank, and accessories), select sea/land transport suitable for heavy equipment, complete customs clearance, cover all duties and taxes, comply with IMDG, DOT, and relevant international transport regulations, and safely deliver the undamaged transformer to the buyer’s designated destination for ready-to-install use. |
05 Site And Summary
At SCOTECH, our pad-mounted transformers stand as a benchmark for reliability, efficiency, and engineering excellence in power distribution systems. Built with a fully enclosed, corrosion-resistant structure and advanced low-loss core technology, they deliver consistent, uninterrupted performance with minimal maintenance, reducing operational costs and downtime over their entire lifecycle.
We prioritize precision and flexibility in every unit we manufacture. From custom voltage ratings to enhanced safety features, our team works closely to craft solutions that align with your exact technical specifications and operational demands. Backed by rigorous quality control processes and comprehensive after-sales support, our transformers are a testament to our commitment to delivering long-term value and peace of mind to every customer. Choose SCOTECH for transformers that don’t just meet industry standards-they set them. Partner with us, and let our expertise power your most critical power infrastructure needs.
