Industrial Grade Single Phase Underground Transformer 25kVA Outdoor
Energy Saving & Fully Sealed Maintenance-Free
Leilang Electric's industrial-grade 25kVA pole mounted transformer is engineered for heavy-duty industrial, commercial, and utility power distribution scenarios, delivering reliable voltage conversion with two core advantages: energy-saving performance and a fully sealed, maintenance-free design. Built to withstand harsh industrial environments, it adopts a high-efficiency magnetic circuit and low-loss component configuration, significantly reducing energy waste and long-term operating costs.
Its fully sealed oil-immersed structure completely isolates air, moisture, and dust, eliminating the need for regular oil changes, inspections, or component maintenance—greatly reducing labor and operational expenses for industrial users. Compliant with ANSI, IEEE, and IEC industrial standards, this 25kVA unit ensures stable, continuous operation for industrial equipment, workshops, rural industrial parks, and large-scale distribution networks.
Industrial-Grade Durable Construction: Crafted with heavy-duty cold-rolled steel tank, reinforced with anti-corrosion electrostatic coating, this transformer resists industrial fumes, chemical residues, UV radiation, and extreme temperatures. The robust frame design ensures strong wind resistance and structural stability for pole-mounted suspension.
Energy-Saving Low-Loss Design: Equipped with high-permeability cold-rolled oriented silicon steel core, processed with step-lapped lamination technology to minimize hysteresis and eddy current losses. High-conductivity oxygen-free copper windings reduce resistance loss, ensuring overall efficiency ≥98.95%—exceeding industrial energy-saving standards.
Fully Sealed Maintenance-Free System: Adopts vacuum oil filling and seamless welding technology, creating a hermetic seal that prevents insulation oil oxidation, moisture ingress, and dust contamination. The integrated pressure relief valve and oil level indicator monitor operational status without manual intervention.
Stable Industrial-Grade Performance: Optimized winding turns ratio and precision insulation (vacuum pressure impregnation, VPI) ensure stable voltage output even under heavy industrial loads. High-creepage porcelain bushings resist pollution and lightning impulses.
Standard Pole-Mounted Installation: Designed for direct mounting on standard industrial utility poles, with pre-installed brackets and clearly labeled terminals for quick on-site installation. The compact industrial design fits in limited spaces.
| 10kva-333kva Single-phase oil immersed transformer | ||||||
| Rated Cap acity(kVA) | High | Low Voltage(v) | Connection Symbol | Standard | Short-circuit impedance(%) | Efficiency |
| Voltage(v) | (%) | |||||
| 10 | 4160 7200 12000 12470 13200 13800 19920 24940 34500 |
110 220 230 400 480 |
II0,II6 | IEEE/ANSI/ DOE | 1.8-4% | 98.7 |
| 15 | 98.82 | |||||
| 25 | 98.95 | |||||
| 37.5 | 99.05 | |||||
| 50 | 99.11 | |||||
| 75 | 99.19 | |||||
| 100 | 99.25 | |||||
| 167 | 99.33 | |||||
| 250 | 99.39 | |||||
| 333 | 99.43 | |||||
- Industrial-Grade Reliability - Heavy-duty construction and industrial-standard components ensure stable operation under harsh industrial loads and environments.
- 25kVA Capacity - Perfect for medium-scale industrial equipment, workshops, and industrial distribution networks.
- Energy-Saving Efficiency - Low-loss core and winding design reduces energy waste and long-term electricity costs.
- Fully Sealed Maintenance-Free - Hermetic design eliminates regular maintenance, reducing labor and downtime for industrial users.
- Wide Industrial Compatibility - Complies with global industrial standards, suitable for various industrial power distribution scenarios.
- Industrial workshops, manufacturing plants, and production lines requiring stable power supply
- Rural industrial parks, farm processing facilities, and agricultural industrial loads
- Industrial-scale street lighting, infrastructure construction, and temporary industrial power
- Small to medium industrial and commercial complexes, warehouses, and logistics centers
- Industrial power grid upgrades and distributed power distribution projects
This industrial-grade 25kVA pole mounted transformer is produced under the ISO 9001 quality management system, with each unit undergoing strict factory testing (no-load test, load test, withstand voltage test, and insulation test) before delivery. We comply with industrial standards and provide customized voltage, capacity, and accessory configurations to meet specific industrial project requirements.
Professional technical support, 24-hour after-sales service, and spare parts supply ensure stable operation throughout the product's long service life, minimizing industrial downtime and maximizing operational efficiency.
It features heavy-duty corrosion-resistant construction, industrial-standard insulation, and a robust design that withstands harsh industrial environments (fumes, extreme temperatures, electrical interference). It complies with ANSI/IEEE industrial standards and is built to handle continuous heavy industrial loads.
The 25kVA capacity is ideal for medium-scale industrial scenarios, such as small workshops, manufacturing equipment, industrial lighting, and rural industrial parks—providing sufficient power without overcapacity waste.
It uses a high-efficiency low-loss silicon steel core and oxygen-free copper windings, minimizing hysteresis, eddy current, and resistance losses. With efficiency ≥98.95%, it reduces energy waste and lowers long-term electricity costs for industrial users.
Yes. Its fully sealed vacuum oil-filling and seamless welding design isolates air, moisture, and dust, eliminating the need for regular oil changes, winding inspections, or seal replacements. Only routine visual checks are recommended.
Absolutely. The anti-corrosion, fully sealed tank and weatherproof bushings make it suitable for outdoor and semi-outdoor industrial settings, withstanding rain, salt spray, extreme temperatures, and industrial pollution.
The hermetic design prevents insulation aging and component damage, ensuring a service life of 25-30 years under normal industrial operation—significantly longer than non-sealed transformers.
No. The low-loss design enhances efficiency without compromising stability or load capacity. It maintains stable voltage output even under heavy industrial loads, protecting connected equipment while saving energy.
Yes. We support customization of primary/secondary voltages, cooling methods, and accessories to meet the unique requirements of different industrial power distribution projects.
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