Weatherproof Outdoor Single Phase Pole Mounted Distribution Transformer 25 kVA 13.8 kV 0.24 kV for Remote Area Power Distribution
遠隔配電用の 30 kVA 柱上変圧器。耐候性、耐腐食性の設計で、過酷な環境に耐えます。電圧調整と柔軟な 50/60 Hz 動作のための外部タップ チェンジャーを備えています。コンパクト、軽量なので設置が簡単です。
This weatherproof outdoor single phase pole mounted distribution transformer delivers 30 kVA of dependable power to remote communities and off-grid installations. The primary side is rated 13.8 kV while the secondary delivers 0.24 kV, ideal for overhead rural distribution lines.
The transformer is engineered for permanent outdoor exposure, with a sealed, corrosion resistant tank and premium weatherproof finishing that withstands extreme sunlight, heavy rain, and high humidity. Its compact and lightweight structure allows easy transport and pole installation on remote sites where heavy lifting equipment is not available.
Configured for Latin American grid conditions, the unit supports reliable rural electrification with minimal field maintenance, making it a practical choice for utilities, rural cooperatives, and EPC contractors working on distributed generation and grid extension projects.
- Robust weatherproof outdoor design with heavy duty anticorrosion coating for long service life in exposed environments
- High energy efficiency through grain oriented silicon steel core and optimized winding design reducing no load and load losses
- Compact lightweight construction simplifies transport on rough terrain and rapid pole mounting in remote locations
- Externally operated no load tap changer providing precise voltage adjustment to compensate for long rural feeder voltage drop
- Flexible frequency configuration factory set for 50 Hz or 60 Hz to match every national grid across Latin America
- Secondary voltage customization available including 120/240 V split phase for residential power supply in off grid communities
| Parameter | Specification |
|---|---|
| Type | Single phase, oil immersed, pole mounted outdoor distribution transformer |
| Rated Power | 30 kVA |
| Frequency | Configurable for 50 Hz or 60 Hz operation |
| Cooling | ONAN (Oil Natural Air Natural) |
| Standards | IEC 60076; can be supplied with regional certifications such as NOM, RETIE, IRAM upon request |
| Primary Voltage | 13.8 kV |
| Secondary Voltage | 0.24 kV (single phase two wire) |
| Alternative Secondary Arrangements | 120/240 V split phase, 127 V, 220 V |
| Tappings on High Voltage Winding | ±2 * 2.5% or ±5%, operated by an external no load tap changer accessible from ground level |
| Vector Group | Ii0 or as required |
| Core Material | High permeability cold rolled grain oriented silicon steel, step lap joint construction for low no load loss and quiet operation |
| Windings | Electrolytic grade copper or aluminum, wound with reinforced layer insulation for thermal and mechanical strength |
| Insulation Class | Class A (105°C) with thermally upgraded kraft paper; higher insulation classes available for overloaded rural networks |
| Impedance Voltage | Typically 3.0% to 4.5%, optimized for fault limitation while maintaining good voltage regulation |
| Temperature Rise Limits | 65°C top oil and 65°C winding average over a maximum ambient of 40°C |
| Sound Power Level | Not exceeding 58 dB(A) for quiet operation near residential areas |
| Overall Dimensions (L × W × H) | Approximately 80 × 70 × 110 cm (excluding high voltage bushing projection) |
| Total Weight (including oil) | Approximately 370 kg to 430 kg |
| Oil Weight | Approximately 110 kg to 130 kg |
| Packing Dimensions | Approximately 90 × 80 × 135 cm (export plywood case) |
These values are indicative; exact figures depend on the final specification and accessory list.
The tank receives a multi-layer coating system with a UV stabilized polyurethane top coat. Combined with stainless steel fasteners, the finish resists cracking, fading, and rust even after years under intense tropical sun, heavy rainfall, and high humidity. This solution is proven in the open savannas of Brazil, the Caribbean coastal zones, and the Amazon region.
Standard coating builds on a zinc rich epoxy primer that provides sacrificial protection. For direct coastal installations, an upgraded hot dip galvanized tank with additional epoxy sealing is available. This double protection effectively isolates the steel from salt laden air and acidic organic environments encountered near mangroves and tropical forests.
An integrated surge arrester bracket is factory welded to the tank, allowing field crews to install distribution class arresters directly beside the high voltage bushing. This minimizes lead length and creates a short, low impedance path to ground, significantly lowering the risk of insulation damage during the intense lightning seasons of Central America, Colombia, and Venezuela.
The external no load tap changer provides ±5% voltage adjustment in steps. When deployed at the end of long 13.8 kV feeders in the Andes or the Patagonian steppe, technicians can easily correct secondary voltage without de-energizing the transformer, ensuring stable 240 V supply to remote households and pumps.
The transformer is designed with a compact tank and removable radiators. The total weight with oil stays around 400 kg, and the oil is shipped separately. This permits transport by light truck or even in sections on unpaved mountain roads. The pole mounting hardware is simplified to allow installation with basic hand tools and a small crew, avoiding the need for cranes.
While most Latin American grids operate at either 50 Hz or 60 Hz, some border areas or isolated microgrids may encounter both. The electromagnetic design can be optimized for the specified frequency, and a dual frequency tolerant design can be provided upon request, preventing core saturation and excessive losses. This flexibility supports projects in Argentina and Paraguay (50 Hz), as well as Mexico and Colombia (60 Hz), from a single adaptable platform.
The tank undergoes a comprehensive surface treatment including shot blasting, zinc rich primer, and a UV resistant polyurethane top coat. Stainless steel hardware and sealed gaskets prevent moisture ingress and corrosion. This system is tested to withstand extreme sun, salt fog, and rainfall, enabling decades of operation with only routine visual inspections.
Yes. The externally operated no load tap changer on the primary side allows easy field adjustment of the transformation ratio by ±5% in steps. Technicians can match the local primary voltage without entering the tank, effectively correcting low or high voltage at the secondary side due to long feeder distance.
The tank includes a dedicated bracket for mounting surge arresters directly adjacent to the high voltage bushing. When arresters are installed, the short connection reduces inductive voltage drop and improves protective margin. For areas with extreme lightning activity, we recommend installing appropriately rated distribution class arresters on all three phases of the line and on the transformer.
The standard design is optimized for a single frequency, either 50 Hz or 60 Hz, based on your project requirement. If the site location is uncertain or may be connected to a different grid, a dual frequency design can be provided. Please specify the required operating frequency when requesting a quotation.
Standard output is 0.24 kV (240 V single phase two wire). For rural residential schemes needing 120 V for lighting and 240 V for small appliances, we offer a split phase 120/240 V secondary winding with center tap. Other voltages such as 127 V or 220 V can also be supplied. Confirm your local service voltage when ordering.
Each transformer is delivered with a routine test report that includes ratio, winding resistance, no load loss and current, load loss, impedance voltage, and dielectric tests. Type test certificates can be provided upon request. We also issue conformity declarations aligned with standards such as IEC 60076, NOM, RETIE, or IRAM as required for your project.
Request a quote now and secure a weatherproof 30 kVA pole mounted transformer engineered for your remote area power distribution project in Latin America.
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