Pole Mount Transformer
Sinotech pole mount transformers are purpose-built for overhead power distribution networks, delivering reliable, low-maintenance voltage step-down from medium-voltage overhead lines to end-user service levels for utilities, electrical contractors, and industrial operators across global markets.
Heavy‑duty construction: All‑steel tank, fully sealed, corrosion‑resistant paint
Low‑loss core & windings: High‑grade silicon steel, pure copper windings (aluminum optional)
High efficiency: ≥98% efficiency, low noise, strong overload capability
Weatherproof design: For continuous outdoor use, wide temperature tolerance
Custom Pole Mount Transformer Manufacturer in China
Our product range covers single-phase (10kVA to 167kVA) configurations, rated for 15kV, 25kV, and 35kV primary voltages with secondary outputs tailored to regional standards including 120/240V, 277/480V, and 347/600V, all fully compliant with IEC 60076 and IEEE C57.12.20 international standards.
Primary Voltage
15-35kV
Capacity
5-333kVA
Standards
ANSI/IEEE/DOE/CSA/AS
What Are the Standard Size of Sinotech Pole Mount Transformer?
Rated Power (KVA) | High Voltage ( V) | Low Voltage ( V) | Loss(W) | Dimension(mm) | Weight(kg) | ||||
| No- load Loss(W) | On- load Loss(W) | W | D | H | oil Weigh | Total Weight | |||
| 5 | 34500 19920 13800 7957 7957 13200 7620 12470 7200 or others | 120-240 240-480 347 600 | 19 | 75 | 465 | 485 | 855 | 15 | 92 |
| 10 | 36 | 120 | 500 | 525 | 885 | 22 | 150 | ||
| 15 | 50 | 195 | 520 | 565 | 905 | 30 | 210 | ||
| 25 | 80 | 290 | 560 | 590 | 935 | 45 | 258 | ||
| 37.5 | 105 | 360 | 610 | 625 | 935 | 50 | 340 | ||
| 50 | 135 | 500 | 635 | 675 | 1035 | 62 | 395 | ||
| 75 | 190 | 650 | 745 | 840 | 1035 | 88 | 480 | ||
| 100 | 210 | 850 | 770 | 965 | 1135 | 94 | 530 | ||
| 167 | 350 | 1410 | 795 | 890 | 1335 | 138 | 680 | ||
Note: Above Is Standard Parameter About Our Pole Mount Transformer
Custom Pole Mount Transformer Solutions
Each unit features a cold-rolled grain-oriented (CRGO) silicon steel core optimized to reduce no-load losses by 15-20% compared to industry baseline designs, with copper or aluminum windings available to match project budget and performance requirements
The welded steel tank is nitrogen-purged during assembly and equipped with pressure relief devices, oil level gauges, and durable porcelain or polymer bushings rated for regional lightning impulse levels, with optional completely self-protected configurations integrating primary and secondary circuit breakers plus lightning arresters directly into the tank to eliminate the need for external protection equipment
Rural and Agricultural Power Distribution
Villages and Remote Countryside Electrification
Temporary Power for Construction Sites
Core Advantages of Pole Mount Transformer
Higher Cost Efficiency
Installing our pole-mounted transformers significantly lowers your upfront civil installation and ongoing operating costs. By eliminating heavy concrete foundation pads and underground trenching, we deliver a highly budget-friendly power solution for your power grid.
Flexible Load Capacity
Engineered for ultimate flexibility, our transformers are suitable for both small residential loads and large commercial demands. We manufacture single-phase and bankable three-phase units, matching your exact utility capacity and voltage requirements seamlessly.
Elevated Public Safety
Positioned high above ground level, our elevated installation reduces tampering risks and eliminates pedestrian hazards. This overhead design keeps live high-voltage components safely out of reach from traffic and flood, protecting your assets against vandalism.
Harsh Climate Defenses
Built to withstand harsh environmental conditions, our transformers feature heavy-duty anti-corrosive powder coatings and sealed steel tanks. They endure extreme temperatures, sand dust, and high humidity, ensuring total operational durability for your project site.
Zero Ground Footprints
Mounted elevated directly on utility poles, our pole mount transformers require zero ground land space. This eliminates land acquisition costs, subterranean vault excavation, and site fencing in crowded urban or remote rural sites, cutting total civil engineering budgets.
Easy Field Maintenance
Featuring external oil level indicators and pressure valves, our transformers allow easy ground-level visual inspection and rapid overhead unit replacement during line maintenance to minimize grid downtime and ensure continuous power for all project sites.
Types of Pole Mount Transformer
Pole-mounted transformers are engineered in specific structural and protection configurations. Below is an overview of the main product types and their practical applications across overhead power networks:
Based on Power Load
1. Single-Phase Pole-Mounted Transformers
Converting medium-voltage overhead power into standard 120/240V split-phase electricity, single-phase transformers are the most common workhorse for residential electrification, agricultural farms, and street lighting. Their lightweight single-pole mounting and low purchasing cost deliver a highly reliable, budget-friendly power solution for your decentralized low-density loads.
2. Three-Phase Pole-Mounted Transformers
Built to supply balanced three-phase power (such as 120/208V, 277/480V, or 415V), three-phase transformers handle much larger electrical demand up to 300 kVA. They are ideal for powering commercial plazas, small industrial factories, and heavy HVAC motor loads without occupying valuable ground-level land.
Based on Site Setup
3. Completely Self-Protected (CSP) Transformers
Featuring primary expulsion fuses, secondary circuit breakers, and surge arresters integrated directly inside the sealed oil tank, CSP transformers represent the modern North American standard. By eliminating cluttered external pole-top cutouts, they speed up site installation, reduce maintenance, and enhance public safety in crowded urban zones or lightning-prone areas.
4. Conventional (Non-CSP) Transformers
Conventional pole-mounted transformers rely on external pole-top cutout switches and surge arresters mounted on the crossarm for line protection. They offer a lower upfront equipment purchasing price and allow local line crews to visually inspect and replace external fuses easily on-site, making them a popular choice for budget-conscious rural grids.
How to Quickly Select the Right Type for Your Project
Select by Load Type:
Need power for individual homes or farms? → Choose Single-Phase.
Need power for commercial shops or small factories? → Choose Three-Phase.
Select by Protection Preference:
Want built-in lightning safety, zero external pole clutter, and fast site installation? → Choose CSP Type.
Select by Budget and Servicing:
Want the lowest initial equipment purchase price with simple external fuse servicing? → Choose Conventional Type.
The Role of Pole Mount Transformer in Power Distribution
Pole-mounted transformers are essential step-down units in overhead distribution networks. Their primary function is to convert medium primary voltages (e.g., 11kV to 34.5kV) from utility lines into safe, usable secondary voltages (e.g., 120/240V or 480V) for residential, agricultural, and commercial consumers.
By stepping down the voltage directly at the point of consumption, these elevated units minimize low-voltage cable runs, significantly reducing energy transmission losses. Additionally, they integrate critical protective hardware—such as surge arresters and fuses—to isolate localized grid faults, protect end-user equipment from voltage surges, and ensure continuous power delivery under severe outdoor conditions.
Supporting Distributed Energy Resources (DERs):
In modern smart grids, pole-mounted transformers also accommodate bi-directional power flow. They play a crucial role in receiving surplus electricity generated by residential rooftop solar panels and feeding it back safely into the primary utility grid.
Essential Checklist for Purchasing a Pole Mount Transformer
Procuring the right pole mount transformer requires matching exact equipment specifications with your local utility grid codes. To avoid costly project delays or grid connection rejections, we recommend evaluating these critical factors.
1. Phase, Capacity & Voltage Configurations
Before ordering, confirm whether your site requires single-phase power (10 kVA to 333 kVA) or three-phase power (up to 300 kVA). It is essential to lock down your primary distribution voltage (e.g., 11kV, 13.8kV, 24.9kV, or 34.5kV) and secondary output (e.g., 120/240V, 277/480V, or 347/600V). Sinotech equips all units with standard ±2 x 2.5% de-energized tap changers (DETC) or dual-voltage primary selector switches to accommodate line voltage fluctuations effortlessly.
2. Protection Architecture Selection
Evaluate your utility grid’s pole-top hardware preferences. You can choose a Completely Self-Protected (CSP) design—featuring internal primary expulsion fuses, secondary thermal-magnetic breakers, and tank-mounted surge arresters for all-in-one pole safety—or a Conventional design that relies on external pole-top cutout switches. Sinotech builds both protection configurations to simplify your field installation and match local line crew servicing habits.
3. Utility Grid Code Compliance
Verify that your supplier complies strictly with your destination country’s electrical codes to avoid utility rejection during energization. Our pole mount transformers are engineered, manufactured, and type-tested in full compliance with ANSI/IEEE C57.12.20 for North and Latin America, CSA for Canada, and IEC 60076 for international markets. We issue official certified test reports with every dispatched unit.
4. Energy Efficiency & Corrosion Protection
Look beyond the initial equipment price to evaluate long-term operating losses and cabinet durability. Sinotech utilizes high-grade CRGO silicon steel cores that meet US DOE 2016/2026 and IEC energy efficiency guidelines, drastically cutting operational line losses. For severe coastal, tropical, or industrial environments, we offer C5-M marine-grade powder coatings or 304/316 stainless steel tanks to prevent rust and oil leakage.
5. OEM Manufacturing Backing & Transparency
Sinotech backs every order with customized CAD/PDF engineering drawings, complete electrical parameter sheets, and 100% factory routine test reports (including dielectric, winding resistance, ratio, and pressure leak tests). Our engineering team remains available to assist you throughout installation, commissioning, and long-term grid operation.
FAQ:
Yes. Pole mount transformers are installed high above ground level, keeping live high-voltage components safely out of public reach. Furthermore, our Completely Self-Protected (CSP) models integrate primary fuses, secondary circuit breakers, and surge arresters inside the sealed tank, providing maximum lightning and overload safety.
Pole mount transformers are suspended directly on utility poles for overhead distribution, requiring zero ground space and significantly lower civil installation costs. Pad mount transformers are installed on ground-level concrete pads for underground cabling systems, featuring heavy-gauge tamper-resistant steel enclosures.
With proper routine inspections, high-quality pole mount transformers typically operate dependably for 25 to 40+ years. We utilize high-grade CRGO silicon steel cores, thermal-resistant insulation, and C5-M marine-grade powder coatings or 304/316 stainless steel tanks to withstand extreme outdoor weather.
Yes. We manufacture standard NEMA/ANSI two-position hanger brackets designed for wood, concrete, or steel utility poles. We can customize mounting bolt center-to-center dimensions to match your specific crossarm and pole hardware.
Every unit undergoes 100% factory vacuum pressure-leak testing before packaging. We bolt transformers to reinforced wooden skids, protect porcelain bushings with shock-absorbent covers, and pack orders in enclosed sea-freight crates with desiccant bags.
High Quality, Reliable, and Long lasting Pole Transformer
Our pole-mounted transformers are engineered with premium raw materials, strict production standards, and advanced manufacturing technology to deliver outstanding stability and durability for overhead power distribution systems. Built with high-performance silicon steel core and pure copper windings, these transformers feature low energy loss, high operation efficiency, and quiet running performance, perfectly adapting to long-term outdoor working conditions.
30+ Years of Industry Expertise
With over 30 years of combined experience in power electrical engineering, Sinotech brings unmatched technical depth to every project. Our team understands the complexities of different voltage levels, load profiles, and environmental conditions.
Large Manufacturing Capability
Sinotech operates a world-class manufacturing base capable of handling both small custom orders and large-volume utility projects. Our scale ensures consistent quality, competitive pricing, and reliable delivery for clients worldwide.
Comprehensive Product Portfolio
Sinotech offers a complete range of power transformation products, eliminating the need for multiple suppliers. From distribution transformers to prefabricated substations, we cover your entire power infrastructure requirements.
Full Customization Capability
Sinotech engineers custom transformer solutions for high-altitude zones, extreme temperatures, corrosive atmospheres, and renewable energy applications with documented project success.
IEC, ANSI, and CE Certified Quality
Every Sinotech transformer meets stringent international standards. We provide full test reports and certification documentation with each shipment, ensuring regulatory compliance in your target market.
Rigorous Quality Control Process
Quality is built into every step of our manufacturing process. From silicon steel core selection to vacuum oil filling, Sinotech maintains strict controls to guarantee performance, safety, and long service life.
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OEM Pole Mount Transformer Supplier
Our production lines support both standard power transformer models and fully custom designs, with annual capacity exceeding 15,000 transformer units. We have successfully executed OEM orders for clients in Southeast Asia, the Middle East, Africa, Latin America and more.
Our production lines support both standard power transformer models and fully custom designs, with annual capacity exceeding 15,000 transformer units. We have successfully executed OEM orders for clients in Southeast Asia, the Middle East, Africa, Latin America and more.
Sinotech welcomes inquiries from distributors, brand owners, and EPC contractors seeking a reliable power transformer manufacturer.
Suburban Residential Distribution — Thailand
“We selected Sinotech for our 200-home residential development after comparing three suppliers. The price-to-quality ratio was the best we found for IEC-compliant units. Our electrical contractor noted the quality of the bushings and tank welding was noticeably better than previous projects with other suppliers.”
Global Clients
