YAWEI delivers high-performance single-phase pole-mounted transformers designed to meet the rigorous demands of modern power distribution networks. With years of expertise in transformer manufacturing, YAWEI has successfully supplied high-quality solutions to markets across the Americas, Africa, and Asia, including the United States, Canada, Mexico, Romania, Italy, Spain,the Philippines, and beyond.Our single-phase transformers are commonly installed directly on wooden or concrete utility poles, making them suitable for diverse applications including residential overhead power distribution and light commercial use. These transformers are typically categorized into conventional and CSP types.
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DM-25-138-0.12(024)
Our 25kVA single-phase pole-mounted transformer (Model: DM-25-138-0.12(024)) is a compact, high-reliability power distribution solution designed for overhead power networks, optimized for residential, rural, and light commercial applications. With a 25kVA rated capacity, 13800V primary voltage, and 120/240V secondary voltage, this 13.8kV pole-mounted transformer delivers stable, efficient voltage step-down for overhead distribution systems. Built with a fully sealed weatherproof enclosure and ONAN cooling system, it ensures reliable operation in harsh outdoor environments, engineered for direct mounting on wooden or concrete utility poles, with conventional and CSP design options to meet diverse grid requirements.

This lightweight single-phase pole transformer features a streamlined pole-mounted configuration that eliminates ground space usage, making it ideal for dense urban neighborhoods and remote rural areas where land is limited, with no complex support infrastructure required.
Built with premium-grade core materials and advanced winding technology, our low-loss single-phase distribution transformer minimizes no-load and load losses, delivering consistent voltage output, reducing grid operational costs, and improving overall distribution network efficiency.
The fully sealed, corrosion-resistant enclosure prevents moisture and contaminant ingress, withstanding heavy rain, strong winds, and extreme temperature fluctuations, ensuring long-term uninterrupted operation in remote and exposed outdoor settings.
Elevated mounting shields the unit from ground-level risks, while external bushings and access panels enable quick, easy inspections and repairs. Minimal routine maintenance is required, reducing service interruptions and long-term operational expenses.
Compared to ground-mounted alternatives, this outdoor pole-mounted power transformer requires minimal upfront infrastructure investment and installation labor, offering a budget-friendly solution for grid expansion, rural electrification, and small commercial projects.
| Type | Single phase pole mounted transformer |
| Model | DM-25-138-0.12(024) |
| Installation | Outdoor |
| Altitude | ≤1000m |
| Rated Power | 25KVA or others |
| Cooling Method | ONAN |
| Primary Voltage | 13800V others |
| Secondary Voltage | 120/240V or others |
| Rated Frequence | 60HZ |
| Insulation oil | Mineral oil |
| Tapping Range | +2×2.5% |
| Temperature rise℃) | 65 |
| Connection Group | lio |
This single-phase overhead distribution transformer is ideal for: rural electrification projects for remote villages and off-grid communities; residential power distribution for suburban neighborhoods and street lighting systems; agricultural operations for irrigation pumps and farm equipment; temporary power supply for construction sites and outdoor events; and light commercial applications for small retail outlets, roadside businesses, and telecom towers.
Our pole-mounted transformers are designed and manufactured to meet international distribution transformer standards, with every unit undergoing rigorous factory testing, including insulation resistance, dielectric strength, and temperature rise validation before shipment. We implement a strict end-to-end quality control process, from raw material selection to final assembly, to ensure consistent, long-lasting performance in the field.
With over 30 years of transformer manufacturing expertise, we are a trusted supplier to utility providers, residential developers, rural electrification contractors, and small commercial operators across the Americas, Africa, and Asia. We offer a 99.5% on-time delivery rate, full custom design for extreme climate and project requirements, 2-year extended warranty options, short production lead times, and end-to-end technical support.
Generic installation and use instructions for distribution transformer, containing the following sections:
1.Reparing the site
2.Erecting the support pole
3.Assembling the transformer components
4.Connecting the primary and secondary wiring
5.Testing the transformer before placing it into service
Product Video
