High Efficiency 25 kVA 13.8 kV to 0.24 kV Single Phase Pole Mounted Distribution Transformer for Rural Electrification
Riepilogo Prodotto
Trasformatore da palo da 25 kVA per elettrificazione rurale. Presenta alta efficienza, rivestimento resistente alla corrosione, ampia presa di tensione (±2×2,5%) e funzionamento personalizzabile a 50/60 Hz. Conforme agli standard IEC con opzioni di certificazione regionale.
Attributi chiave
Marchio:
HENTG POWER
Luogo di origine:
Cina
Certificazione:
CE
MOQ:
6
Capacità di approvvigionamento:
20
Tempi di consegna:
35
Termini di pagamento:
L/C,D/A,D/P,T/T,Western Union
Imballaggio standard:
cassa di legno
Attributi personalizzati del prodotto
Nome del prodotto:
trasformatore montato a palo monofase
Capacità nominale:
25 chilovolt
alta tensione:
13.8 KV
Bassa tensione:
0,24 kV
TAPPING RANGE:
2x2,5%
Descrizione del prodotto
High Efficiency 25 kVA 13.8 kV to 0.24 kV Single Phase Pole Mounted Distribution Transformer for Rural Electrification
Product Overview
This high efficiency single phase pole mounted distribution transformer is engineered for reliable power delivery in rural electrification projects. With a rated capacity of 25 kVA, a primary voltage of 13.8 kV, and a secondary voltage of 0.24 kV, it provides a turnkey solution for overhead distribution networks. The unit features an oil immersed core and coil assembly housed in a durable, corrosion resistant tank, optimized for outdoor pole installation. Specifically adapted for Latin American grid conditions, this transformer delivers consistent performance under demanding climatic and load environments, helping utilities, contractors, and EPC companies expand electricity access to remote communities with minimal maintenance requirements.
Key Features
- High energy efficiency with ultra low core and winding losses reducing long term operational costs
- Heavy duty corrosion resistant tank coating system designed for coastal areas and high humidity environments
- Compact lightweight construction simplifies pole mounting and reduces installation infrastructure requirements
- Wide range no load tap changer allows precise voltage regulation to match local grid fluctuations
- Versatile frequency compatibility capable of stable operation on both 50 Hz and 60 Hz networks
- Customizable secondary voltage arrangements including 120/240 V split phase output upon request
Technical Specifications
| Parameter | Specification |
|---|---|
| Type | Single phase, oil immersed, pole mounted distribution transformer |
| Rated Power | 25 kVA |
| Frequency | Configurable for 50 Hz or 60 Hz operation |
| Cooling Method | ONAN (Oil Natural Air Natural) |
| Applicable Standards | IEC 60076, can be manufactured to meet regional certifications such as NOM, RETIE, IRAM upon request |
| Primary Voltage | 13.8 kV |
| Secondary Voltage | 0.24 kV (single phase two wire) |
| Other Secondary Voltage Options | 120/240 V split phase, 127 V, 220 V |
| Tappings on Primary Side | ±2 * 2.5% or ±5% (standard) via externally operated no load tap changer |
| Vector Group | Ii0 or as required |
| Core Material | High permeability grain oriented silicon steel, step lap joint design for reduced no load loss and lower sound level |
| Winding Material | Electrolytic grade copper or aluminum, selected to balance cost and performance |
| Winding Insulation | Class A (105°C) with thermally upgraded paper or higher insulation class available for enhanced thermal endurance |
| Impedance Voltage | Typically 3.0% to 4.5% at rated tap, optimized for fault current limitation and voltage regulation |
| Tank Construction | Heavy gauge steel plate, hot dip galvanized or painted with multi layer anti corrosion coating |
| High Voltage Bushing | Outdoor wet process porcelain or composite polymer, creepage distance suitable for highly polluted or high altitude areas |
| Low Voltage Bushing | Porcelain or epoxy resin |
| Internal Protections | Primary side fuse link or bayonet type fuse holder (optional) |
| Lightning Protection | Provision for mounting surge arresters on the tank or bracket |
| Maximum Temperature Rise | 65°C top oil, 65°C winding average over ambient of 40°C, ensuring long insulation life |
| Sound Power Level | Below 60 dB(A) depending on capacity, suitable for rural and residential areas |
Regional Solutions for Latin American Markets
Latin America presents diverse geographical, climatic, and grid conditions. This transformer integrates specific design measures to address those regional requirements directly.
- High Humidity and Coastal Corrosion: The tank undergoes a seven stage surface treatment including shot blasting, zinc rich primer, and polyurethane or epoxy top coat. Stainless steel nameplate and hardware further resist corrosion. This solution protects the unit in Caribbean islands, coastal Ecuador, and humid Amazon basin regions.
- Frequent Grid Voltage Fluctuations: The externally adjustable no load tap changer with ±2 * 2.5% taps on the high voltage side enables field voltage correction without opening the tank. Utilities in Peru and Bolivia can fine tune the transformer to compensate for long rural feeder voltage drops without service interruption.
- High Altitude Installation: High voltage bushings are supplied with extended creepage distances and additional air insulation clearances to meet altitude derating requirements up to 2500 meters or higher. This supports installations across the Andes mountain regions in Chile, Colombia, and Ecuador.
- Lightning Prone Areas: The transformer tank includes standard brackets for surge arrester mounting. When paired with appropriately rated distribution class arresters, the system significantly reduces the risk of insulation failure from lightning strikes common in Central American tropical regions.
- Mixed Frequency Grids: The electromagnetic design of the core and coils can be factory optimized for the specified frequency, whether 50 Hz (as in Argentina, Chile) or 60 Hz (as in Mexico, Colombia). A dual frequency design option is available for projects where the final grid frequency may vary. This prevents overheating and efficiency loss due to frequency mismatch.
- Split Phase Residential Service: For markets requiring 120/240 V three wire service (such as parts of Brazil, Ecuador, Guyana), the low voltage winding can be manufactured with a center tap, providing both 120 V and 240 V outputs. This single transformer solution powers both lighting and small appliances in rural households, simplifying inventory and installation for EPC contractors.
Frequently Asked Questions
Can this transformer operate on both 50 Hz and 60 Hz systems, and how is the correct frequency specified?
Yes, the transformer can be designed for either 50 Hz or 60 Hz operation. During the inquiry process, please specify the local grid frequency of your project. We optimize the core and winding design accordingly to ensure full rated capacity and temperature rise compliance. A dual rated design for both frequencies is also available on request.
Is 0.24 kV the only secondary voltage available, or can it be adapted for 120/240 V split phase systems?
The standard secondary voltage is 0.24 kV (240 V single phase), which directly matches the common 220-240 V grids in Argentina, Chile, and Uruguay. For markets using 120/240 V split phase, we provide a low voltage winding with a central tap. Please specify the required secondary configuration, and we will build the unit to your exact specification.
What anti corrosion protection is provided for installations near the sea or in very humid areas?
Our standard protection includes heavy duty shot blasting, a zinc rich epoxy primer, and a high build polyurethane top coat resistant to salt fog and UV radiation. This painting system is tested for tropical and coastal environments. For extreme marine exposure, we can upgrade to a full stainless steel tank upon request.
Does this transformer come with the necessary mounting brackets for wooden or concrete poles?
Yes, each unit is supplied with a set of pole mounting clamps and brackets suitable for both wooden and concrete poles. The mounting hardware is hot dip galvanized steel. If you use non-standard pole diameters, please provide the dimensions during order confirmation, and we will adapt the hardware accordingly.
What regional certifications or standards can this transformer meet for Latin American projects?
We manufacture according to IEC 60076 as our base standard. On request, we can provide transformers that comply with specific national standards such as NOM 002 SEDE (Mexico), RETIE (Colombia), IRAM 2476 (Argentina), and PROCEL (Brazil). Type test reports and certified documentation are submitted with the order delivery to support your project acceptance.
What is the typical production lead time and packaging for maritime transport to Latin America?
Standard production lead time is 35 to 45 days after order confirmation and receipt of deposit. The transformer is drained of oil, purged with dry nitrogen, and packed in a sturdy plywood or steel pallet crate suitable for ocean freight. The oil is shipped in separate sealed drums. We have regular shipping experience to major ports including Callao, Buenaventura, Santos, and San Antonio.
Request a quote today and get a customized 25 kVA pole mounted transformer solution for your Latin American rural electrification project.
Request Quote
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