Pole Mount Transformer
Unicore’s pole mount transformers are designed for reliable, long-term performance in overhead distribution networks, delivering efficient voltage step-down from medium-voltage lines to end-user supply levels across rural electrification projects, urban distribution grids, and roadside infrastructure applications worldwide.
Built to IEC 60076 and your specified standards, each transformer is engineered for ease of installation on single or double-pole structures, with compact dimensions and lightweight construction that reduce both installation time and civil costs.
Custom Transformer Solutions
Voltage: 11/33 kV
Capacity: 10-315 kVA
Frequency: 50/60 Hz
Access Top Quality Transformer Solutions to Elevate Your Power Projects
Reliable Pole Mount Transformer For Sale
Best Price Overhead Transformer
Unicore supplies pole-mounted transformers for sale to utilities, rural electrification projects, and distribution network operators worldwide. Available in capacities from 10 kVA to 315 kVA, with primary voltages configured to your local grid standard — 11kV, 22kV, 33kV, or as specified, Unicore pole-mounted transformers deliver dependable power distribution wherever the grid extends.
Low no-load loss for energy-efficient continuous operation
Compatible with dropout fuse and surge arrester configurations
Corrosion-resistant tank and fittings for outdoor longevity
Hermetically sealed design prevents moisture ingress and oil leakage
Proven performance in high-humidity, high-temperature tropical environments
Suitable for rural electrification, urban distribution, and roadside supply
D13-M.R-10~160 Sample Specifications — Full Data for All Series Available Upon Request
Specifications
| Capacity (kVA) | High Voltage (kV) | High Voltage Tap Range (%) | Low Voltage (kV) | Frequency (Hz) | Short Circuit Impendance (%) | No-Load Loss (W) | Load Loss (W) |
| 10 | 6 6.3 10 10.5 11 | ±5 ±2×2.5 | 2*(0.22-0.24) (0.22-0.24) | 50 60 | 3.5 | 36 | 235 |
| 16 | 44 | 330 | |||||
| 20 | 52 | 385 | |||||
| 30 | 64 | 560 | |||||
| 40 | 80 | 700 | |||||
| 50 | 96 | 855 | |||||
| 63 | 116 | 1020 | |||||
| 80 | 128 | 1260 | |||||
| 100 | 152 | 1485 | |||||
| 125 | 184 | 1755 | |||||
| 160 | 232 | 2130 |
Discover Core Advantages of Transformers to Optimize Your Power Layout
Remarkable Advantages of Unicore Pole Mount Transformer
Energy-Efficient Low-Loss Design
Unicore pole-mounted transformers are engineered with high-quality CRGO silicon steel cores to minimise no-load losses, reducing energy waste during continuous operation. Lower core losses translate directly into reduced operating costs and improved efficiency across your entire distribution network over the transformer’s service life.
Maintenance-Free Oil-Immersed Cooling
Each unit utilises oil-immersed self-cooling (ONAN) technology, eliminating the need for external cooling equipment or regular maintenance intervention. The hermetically sealed tank design prevents moisture ingress and oil leakage, ensuring consistent performance and extended service life in outdoor overhead installations.
Built for Harsh Environments
Unicore pole-mounted transformers are designed and tested for reliable operation in demanding climatic conditions — including high-humidity tropical environments, extreme temperature ranges, coastal salt-air exposure, and high UV radiation zones — making them suitable for deployment across Africa, Southeast Asia, the Middle East, and beyond.
Protective Accessory Compatibility
Unicore pole-mounted transformers are designed for compatibility with standard overhead line protection accessories — including dropout fuses, surge arresters, and disconnectors — allowing straightforward integration into existing overhead distribution networks without modification to your standard protection scheme.
Voltage Regulation via Tap Changer
An off-circuit tap changer is available on all Unicore pole-mounted transformer units, allowing voltage ratio adjustment to compensate for line voltage variation and maintain stable secondary voltage output — particularly important for rural distribution lines where voltage drop across long distances is a common challenge.
Corrosion-Resistant Tank and Fittings
Every Unicore pole-mounted transformer tank and external fitting is treated with multi-stage surface preparation — including shot blasting, phosphating, and high-build epoxy primer — followed by weather-resistant topcoat finishing, ensuring long-term protection against rust, UV degradation, and atmospheric corrosion in outdoor overhead installations.
Trusted by Clients Across Industries and Continents
Unicore Pole Mount Transformer Global Cases
Pole Mount Transformers to Colombia
Rural Electrification Project
50 kVA
Pole Mount Transformers to Brazil
Urban Distribution Network
167 kVA
Pole Mount Transformers to Egypt
Agricultural Power Supply
100 kVA
UNICORE ELECTRIC
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Real Experiences from Transformer Professionals Who Trust Unicore
What Our Clients Say
Perfect Fit for Our Overhead Network
“Unicore configured the primary voltage precisely to our local 33kV grid standard, saving our engineering team significant on-site adaptation work. The units were compact, lightweight, and straightforward to install. Lead time was competitive and the export documentation was complete and accurate on first submission.”
Ahmed Al-Rashidi
Oman
⭐⭐⭐⭐⭐
Tap Changer Solved Our Voltage Drop Issue
“Our rural distribution lines span considerable distances, and voltage drop at the end of the line was an ongoing problem. Unicore recommended units with off-circuit tap changers, which allowed our field teams to fine-tune the secondary voltage on site. It was exactly the right technical solution for our network.”
David Mensah
Ghana
⭐⭐⭐⭐⭐
Choosing the Right Transformer and Partner for Your Infrastructure
Types of Pole Mount Transformer
Single-Phase Pole Mount Transformer:
The standard choice for rural electrification and residential neighborhoods with lower load density. It offers a simple, highly reliable, and cost-effective solution for standard household appliances and lighting.
3-Phase Pole Mount Transformer:
Engineered for high-demand environments such as industrial parks, commercial centers, and dense urban districts. It provides stable power for heavy machinery, centralized HVAC systems, and high-capacity infrastructure.
Conventional Type Pole Mount Transformer:
A modular option that relies on external protection devices, such as dropout fuses and lightning arresters. It is ideal for utilities that prefer using their own standardized external protection systems.
Completely Self-Protected (CSP) Pole Mount Transformer:
An integrated, modern design that incorporates internal primary fuses, secondary breakers, and surge arresters directly inside the tank, enhancing safety and significantly reducing external installation components.
Value We Deliver:
Whether your project requires a standard single-phase unit or a specialized 3-phase CSP transformer, Unicore Electric provides end-to-end manufacturing and technical support tailored to your grid parameters:
Flexible Engineering Customization:
We manufacture to match various international standards (IEC, ANSI, IEEE) with customized kVA ratings, voltage ratios, and heavy-duty anti-corrosion coatings (such as C5-M for coastal areas).
Pre-Matched Accessory & Protection Solutions:
For conventional models, we supply fully compatible external fuse and arrester packages; for CSP models, we perform factory testing on all integrated breakers to guarantee immediate reliability.
Streamlined Site Deployment:
Our factory-engineered and pre-tested units reduce pole-mounting labor, eliminate compatibility issues, and lower the long-term Total Cost of Ownership (TCO) through optimized low-loss CRGO cores.
Delivering Reliable Power Across Residential, Rural, Commercial, and Industrial Infrastructure
Versatile Applications of Pole Mount Transformer
Residential Power Distribution
Serving as the backbone of overhead residential distribution networks, pole mount transformers step down medium-voltage power to standard low-voltage grid utilization levels. They deliver continuous electricity for all household HVAC systems, lighting, and appliances, providing a flood-resistant and space-saving power delivery solution for modern urban and suburban residential neighborhoods.
Agricultural and Rural Grids
Designed for long-distance power distribution across low-density regional networks, these transformers power remote farmsteads, large irrigation pumping stations, and agricultural processing hubs. Their robust anti-corrosive design ensures reliable performance in harsh outdoor environments, making rural grid expansion highly economical, secure, and dependable for long operational lifespans.
Construction and Mining Operations
Ideal for temporary construction job sites, demanding field mining operations, and remote roadside oil pumping wells tapped directly from overhead power lines. These transformers require no permanent concrete pad foundations, offering rapid deployment and easy relocation to deliver highly dependable continuous electrical power for heavy cranes, heavy-duty drilling rigs, and essential site office facilities.
Public Infrastructure Systems
Essential for municipal utilities, these pole mount transformers supply uninterrupted electricity to highway lighting networks, smart traffic control systems and remote cellular communication towers. Their elevated installation prevents ground-level tampering, vandalism, and severe flood damage, ensuring maximum operational uptime for critical public infrastructure networks and local emergency services.
Commercial and Light Industry
Supplying reliable commercial electricity to retail shopping complexes, small manufacturing workshops, and local repair facilities, pole mount transformers handle peak load fluctuations with ease. Available in single and three-phase configurations, they power heavy motor machinery while keeping valuable ground space completely clear for ongoing daily commercial business operations.
Coastal and Marine Facilities
Specifically built for coastal docklands, aquaculture farms, and waterfront facilities highly vulnerable to high tides and ocean flooding. Elevated pole mounting prevents water ingress risks, while specialized anti-corrosive coatings safeguard all internal components against harsh marine weather conditions, high humidity levels, and aggressive salt-spray corrosion over long lifespans.
Engineered to Your Exact Utility Specifications
Tailor-Made Engineering for Every Spec
Custom Cover Ground Straps
We custom-manufacture grounding straps to match your local utility’s exact earthing clamp design. Choose 304/316L stainless steel or pure electrolytic copper, with custom-punched bolt holes, specific gauge thickness, and flexible lengths tailored for your Pole Mount Transformer projects.
- Material Options: Pure electrolytic copper or 304 and 316L grade stainless steel
- Dimension Options: Custom strap length, board thickness, and specific bolt hole spacing
- Code Alignment: Fully customized to comply with local utility grounding standards
Custom HV Cover-Mounted Bushings
Configure your primary connections for any demanding outdoor environment. Specify Live-Front with eyebolt terminals or Dead-Front loadbreak elbows, select porcelain or composite polymer, and request extended creepage distances up to 31mm/kV for coastal Pole Mount Transformer installations.
- Terminal Style: Open Live-Front or 200A Dead-Front loadbreak elbow configurations
- Insulation Materials: High-grade porcelain or composite polymer with extended creepage
- Electrical Ratings: Custom BIL voltage ratings and specific impulse voltage thresholds
Custom LV Side-Mounted Bushings
Eliminate field cabling hassles by customizing your low-voltage terminal layout. Specify 2, 4, 6, or 8-hole tin-plated NEMA spade terminals, arranged inline or staggered, positioned at custom heights to align directly with your secondary riser cables.
- Spade Terminals: Standard 2, 4, 6, or 8-hole tin-plated NEMA spade terminals
- Spatial Layout: Inline, staggered, or custom height and angled mounting orientations
- Cable Matching: Customized terminal stud diameters to fit specific distribution wires
Custom Pressure Relief Devices
Customize tank overpressure safety according to your grid’s specific PSI limits. We calibrate relief valves to your exact burst thresholds (e.g., 10 PSI or 15 PSI), offering optional visual indicator pins, manual pull-rings, or SCADA micro-switch alarm contacts.
- Pressure Threshold: Factory-calibrated PSI venting limits between 10 and 15 PSI
- Visual Alerts: Color-coded pop-out indicator pins or manual pull-ring resets
- Remote Monitoring: Optional micro-switch contact integration for SCADA grid telemetry
Note: Don’t see your specific grid requirement or hardware configuration listed above? Send us your technical drawings and specification sheets, and Unicore Electric will manufacture a Pole Mount Transformer engineered precisely to your project parameters.
Key Best Practices for Operational Reliability and Extended Lifespan
Maintenance Guide for Pole Mount Transformer
To maximize transformer performance and guarantee safety across power networks, electrical utilities and contractors should implement a structured preventive maintenance strategy.
1. Thermal and Visual Inspection
Combine routine visual checks with infrared thermal imaging to detect hidden electrical issues early. Thermal scans identify localized joint overheating, internal arcing, and abnormal tank hot spots before visible surface rust, oil leaks, or sudden insulation failures occur on the overhead distribution pole.
2. Insulation Oil Quality Testing
Regularly test transformer oil for dielectric breakdown voltage, moisture content, and acidity levels. Periodic oil fluid sampling and online dehydration filtration remove dissolved gases and contaminants, restoring dielectric strength and preserving essential cooling properties required for long operational service lives.
3. Bushing and Arrester Maintenance
Inspect porcelain or polymer bushings and surge arresters for hairline cracks, pollution tracking, and flashover marks. Clean insulating surfaces routinely and replace faulty arresters to prevent line short circuits and protect internal windings from destructive atmospheric lightning surges and line switching.
4. Terminal Tightening and Corrosion Defense
Inspect all high and low voltage terminal connections for proper torque and signs of oxidation. Tighten loose hardware, verify ground wire continuity, and apply protective anti-corrosion touch-up coatings to prevent severe structural tank rust in coastal or high-humidity outdoor environments.
5. Load and Temperature Monitoring
Track transformer operating currents continuously to prevent severe overloading and phase imbalance. Monitoring dynamic load profiles prevents premature thermal degradation of paper insulation, ensuring the transformer operates safely within rated thermal limits during peak electricity demand periods across the grid.
Note: Proper operation, selection, and regular maintenance are critical to the performance of any Pole Mount Transformer. If you encounter any technical issues, installation challenges, or custom specification questions, please contact our engineering team at any time.
Essential Guidance on Pole Mount Transformer Selection, Customization, and Procurement
Frequently Asked Questions：
A: A Pole Mount Transformer is mounted overhead on utility poles, saving 100% of ground footprint and avoiding flooding risks. Pad Mount Transformers sit on ground-level concrete pads. Choosing a Pole Mount Transformer significantly lowers site installation costs for overhead distribution grids.
A: Single-phase units (10–167 kVA) are most economical for residential and rural loads. Three-phase units are designed for high-density urban, commercial, and industrial power demands. Our team helps you specify the exact kVA rating needed.
A: With proper maintenance, a Unicore Pole Mount Transformer operates reliably for 30 to 40+ years. We use premium CRGO cores, high-grade insulation oil, and multi-stage anti-corrosion tank coatings to ensure maximum outdoor durability.
A: Yes. We offer full OEM customization compliant with IEEE, ANSI, DOE, and IEC standards. You can specify voltage ratios, bushing styles (Live-Front or Dead-Front), terminal spade patterns, and protective devices for 100% grid compatibility.
A: We offer industry-leading production turnaround times faster than the market average. For urgent projects or emergency replacements, accelerated manufacturing schedules are available to minimize site downtime and keep your project on schedule.
A: Every Pole Mount Transformer undergoes 100% factory routine testing before dispatch, including insulation resistance, ratio, and dielectric withstand tests. Ships complete with a factory test report and full warranty coverage.
Why Choose Unicore
Your Trusted Partner in Power Solutions
Pole-mounted transformers are the backbone of last-mile power distribution — and getting them right matters. Whether you are expanding a national grid, electrifying rural communities, or replacing ageing overhead units, Unicore delivers pole-mounted transformers built for the realities of outdoor overhead operation: harsh climates, long service intervals, and zero tolerance for downtime.
Engineered for Outdoor Longevity
Hermetically sealed tanks, corrosion-resistant fittings, and multi-stage surface treatment ensure reliable performance in high-humidity, high-temperature, and coastal environments — with minimal maintenance intervention required throughout the transformer’s operational service life.
Protection Accessory Compatible
Every unit is designed for straightforward integration with standard overhead line protection equipment — including dropout fuses, surge arresters, and disconnectors — fitting directly into your existing protection scheme without modification or additional engineering work.