Underground Single Phase Pad Mount Transformer Copper Winding Fully Sealed

The single-phase pad-mounted oil-immersed transformer is a US-standard fully sealed distribution equipment specifically designed for overseas power distribution systems in North America, Latin America, and other regions. It fully complies with and exceeds international standards including ANSI, DOE, IEEE, and CSA, serving as core equipment for low-voltage power distribution in residential, commercial, public facilities, and various other applications.

This product series features an independent compartment structure with core advantages including compact design, small footprint, light weight, low noise, minimal loss, safety reliability, anti-theft protection, and maintenance-free operation. It can be directly installed on outdoor ground foundations without additional power distribution rooms, significantly reducing infrastructure costs.

With rated capacity covering 10kVA-250kVA and maximum input voltage up to 34.5kV, it perfectly adapts to mainstream North American power distribution systems. Applications include residential areas, commercial centers, hospitals, parks, schools, rural power grids, and small industrial/commercial enterprises.

We independently develop and produce key components including oil tanks and iron cores, with monthly delivery capacity exceeding 600 units and fast delivery within 35 days. We support fully customized production to meet personalized project requirements.

Constructed from high-quality cold-rolled grain-oriented silicon steel sheets using multi-stage step-lapped full-oblique joint lamination process. This design significantly reduces magnetic resistance, effectively lowering no-load loss and no-load current while complying with DOE energy efficiency standards. The iron core undergoes vacuum impregnation and overall sealing treatment, providing high mechanical strength, low operating noise, and long-term operational stability suitable for all-weather outdoor conditions.

• High-voltage winding adopts multi-layer cylindrical structure wound with high-purity oxygen-free copper wire. Interlayer insulation uses high-strength insulating paper treated with vacuum impregnation process, ensuring excellent insulation performance and strong resistance to short circuit and lightning impulse.
• Low-voltage winding features foil-wound structure with tight winding and high concentricity, providing excellent heat dissipation performance that effectively reduces load loss and improves transformer operating efficiency, eliminating overheating risk during long-term full-load operation.

• Adopts fully sealed corrugated tank structure with environmentally friendly mineral oil (vegetable insulating oil optional) as insulating cooling medium, completely isolating air and moisture to prevent oil deterioration and insulation aging.
• Enclosure constructed from NEMA 3R weatherproof and corrosion-resistant steel plate with high-temperature electrostatic spraying surface treatment, featuring strong weather resistance adaptable to extreme environments from -40℃ to +50℃.
• Incorporates Dead Front design with all live parts completely enclosed, no exposed live parts on operation surface, equipped with anti-theft locks to prevent misoperation and electricity theft.

• Equipped with standard accessories including pressure relief valves, oil level gauges, thermometers, and tap changers to comprehensively ensure safe transformer operation.
• Double-compartment structure provides complete isolation between high-voltage and low-voltage sides, supporting ring network/radial wiring to meet different power distribution system requirements.
• Supports off-circuit voltage regulation for flexible adjustment according to on-site voltage requirements to ensure stable output voltage.

1. US-Standard Compliance, Global Adaptability: Fully complies with North American standards including ANSI, DOE, IEEE, and CSA, with UL certification. Directly adaptable to overseas power distribution systems without additional modification.
2. Ultimate Energy Saving, Cost Reduction & Efficiency Improvement: Low-loss iron core and winding design with no-load and load losses far below industry standards, complying with DOE energy efficiency requirements.
3. Safe, Reliable and Maintenance-Free: Fully sealed structure with Dead Front design, no exposed live parts, anti-theft and anti-misoperation features, maintenance-free operation with strong resistance to short circuit and impact.
4. Compact and Aesthetic, Easy Installation: Low-profile, compact design with attractive appearance, direct installation on outdoor ground foundations without power distribution rooms, suitable for scenarios with high landscape requirements.
5. Customized Service, Fast Delivery: Supports full-dimensional customization of capacity, voltage, accessory configuration, and insulating medium. Independent production of core components with monthly capacity over 600 units and fast delivery within 35 days.
6. Environmentally Friendly and Durable, Ultra-Long Service Life: Utilizes environmentally friendly insulating oil, no harmful emissions, fully sealed structure to eliminate pollution, with service life exceeding 30 years.

• Residential Power Distribution: Residential areas, villas, apartments - providing safe and stable single-phase power supply
• Commercial Facilities: Commercial centers, convenience stores, small shops - meeting commercial power demand
• Public Facilities: Hospitals, schools, parks, municipal projects - ensuring reliable power supply for public facilities
• Rural Power Grid: Rural power distribution, agricultural irrigation, power supply in remote areas - solving long-distance power distribution problems
• Industrial and Commercial Scenarios: Small factories, gas stations, communication base stations - meeting industrial and commercial single-phase power demand

This single-phase pad-mounted transformer series is produced in strict accordance with ISO9001 quality management system. All products pass full type testing per ANSI/IEEE standards, with 100% independent production of core components and comprehensive performance testing before delivery.

We provide one-stop foreign trade services from selection design, manufacturing, export customs declaration, installation guidance to after-sales operation and maintenance. We support customized specifications and provide Chinese/English technical documents and certification documents to meet overseas project compliance requirements.

After-sales service includes lifelong technical support, spare parts supply, and quick-response maintenance services, ensuring stable equipment operation throughout the entire lifecycle.