10kVA 25kVA 37.5kVA 50kVA 100kVA 150kVA 250kVA Single Phase Pole Mounted Distribution Transformer

10kVA 25kVA 37.5kVA 50kVA 100kVA 150kVA 250kVA Single Phase Pole Mounted Distribution Transformer | 7.2kV Oil Immersed Power Transformer

1. Product Description

This professional single phase pole mounted distribution transformer series covers comprehensive capacity specifications including 10kVA, 25kVA, 37.5kVA, 50kVA, 100kVA, 150kVA and 250kVA, fully tailored for global outdoor overhead power distribution systems. As a standard 7.2kV power transformer, this oil immersed pole mounted unit is designed with 7.2kV medium primary input voltage, serving as the core terminal voltage conversion equipment for municipal and rural 7.2kV overhead transmission lines. Manufactured to comply with ANSI, IEEE and IEC international electrical standards, this single phase oil filled transformer delivers reliable step-down voltage conversion for residential, commercial and light industrial single-phase loads, solving the voltage matching problem between medium-voltage utility grids and low-voltage end-user equipment.

Built with practical field engineering requirements in mind, each 7.2kV single phase pole mounted transformer adopts high-quality low-loss grain-oriented silicon steel core and high-purity copper winding structure. The optimized magnetic circuit layout and integral winding fastening process effectively reduce no-load loss, load fluctuation and operating temperature rise, overcoming the high energy consumption and unstable output defects of traditional old-fashioned pole transformers. Adopting proven ONAN oil-natural air-natural cooling technology and fully sealed corrugated oil tank design, the equipment eliminates open conservator structures, completely isolating internal insulating oil from external dust, moisture and corrosive air to prevent oil aging, insulation degradation and internal component damage during long-term outdoor operation.

Covering ultra-small, medium and large low-load capacities from 10kVA up to 250kVA, this full-range single phase distribution transformer series meets diversified power supply demands of scattered single households, clustered residential communities, small commercial blocks and suburban light industrial sites. Adaptable to both 50Hz and 60Hz global power grid frequencies, the 7.2kV overhead transformer features stable electromagnetic performance, strong short-circuit resistance and low partial discharge characteristics. With lightweight pole-mounted structure, simple installation and excellent weather resistance, this multi-capacity oil immersed transformer has become the most widely used cost-effective solution for rural electrification, urban and suburban grid upgrading, and remote area single-phase power supply projects worldwide.

2. Core Product Purposes

The core purpose of this multi-capacity 7.2kV single phase pole mounted distribution transformer is to implement safe, low-loss and stable medium-to-low voltage conversion for outdoor 7.2kV overhead power grids, providing standardized low-voltage power for residential living, small commercial facilities and light industrial single-phase loads while optimizing regional grid operation stability and power supply quality.

In daily utility power system operation, this oil immersed power transformer undertakes essential terminal power transformation work. It accurately steps down 7.2kV medium transmission voltage from overhead power lines into usable low voltage that matches end-user electrical equipment parameters, fundamentally solving the problem of mismatched grid voltage and household, commercial and agricultural power consumption equipment. The gradient capacity design realizes refined load classification: 10kVA and 25kVA low-capacity models adapt to ultra-light scattered loads, 37.5kVA and 50kVA medium-capacity units suit conventional residential and small commercial loads, while 100kVA, 150kVA and 250kVA high-capacity specifications meet concentrated clustered loads and suburban light industrial power demands, avoiding equipment overload operation or capacity resource waste.

Beyond basic voltage transformation, this low-loss single phase pole transformer effectively improves the overall operating efficiency of regional single-phase power distribution networks. It suppresses overhead line voltage fluctuation and minor harmonic interference caused by seasonal load changes and frequent equipment switching, compensates line voltage drop generated by long-distance overhead transmission, and maintains consistent terminal voltage output. Equipped with excellent lightning surge resistance and overload tolerance, it buffers instantaneous current surges from outdoor lightning strikes and peak power consumption, isolates local circuit faults, prevents fault spread to upper-level grids, and reduces daily operation and maintenance pressure for unattended outdoor power distribution points.

3. Typical Application Scenarios

3.1 Rural Electrification & Remote Village Power Supply

This 7.2kV single phase pole mounted distribution transformer is the primary supporting equipment for rural grid construction and remote village electrification projects. Most rural and remote areas adopt 7.2kV medium-voltage overhead power transmission mode with scattered single-phase household loads. The 10kVA and 25kVA models are ideal for single remote households and ultra-small scattered power loads, while 37.5kVA and 50kVA specifications suit ordinary rural village households. The pole-mounted installation method saves land resources, adapts rural overhead line layout characteristics, and stably supports long-term unattended outdoor power supply for rural daily living facilities and household electrical equipment.

3.2 Suburban Residential & Villa Community Distribution

Widely deployed in low-density suburban residential areas, villa communities and town residential blocks, this multi-capacity oil immersed transformer meets clustered single-phase power consumption demands. The 100kVA and 150kVA medium and high-capacity models perfectly match multi-household residential clusters with high comprehensive power consumption, supporting simultaneous operation of household high-power appliances and daily low-power equipment. The fully sealed weather-resistant structure resists ultraviolet aging, rain erosion and extreme temperature changes, ensuring stable and safe round-the-clock power supply for suburban residential communities.

3.3 Small Commercial & Street Public Facility Power Supply

The full-range transformer series is extensively applied for street-side shops, community supermarkets, rural service stations, street lighting systems and municipal public facilities. Small commercial and public facility loads are dominated by fluctuating single-phase power demands, and the flexible capacity range from 25kVA to 100kVA can accurately match commercial lighting, office equipment and public electrical loads. Its compact pole-mounted design avoids ground occupation in crowded commercial streets, reducing on-site construction costs and improving the safety and tidiness of urban and rural commercial power distribution networks.

3.4 Agricultural Production & Field Auxiliary Power Supply

It serves as reliable power transformation equipment for rural agricultural irrigation systems, breeding base ventilation equipment, field monitoring devices and small agricultural processing machinery. Most agricultural auxiliary equipment adopts single-phase power design without three-phase load requirements. The 50kVA to 150kVA capacity models can continuously and stably supply power for field mechanical equipment, adapting to harsh outdoor field environments such as high temperature, dust and humidity, and providing stable power guarantee for modern agricultural production and rural economic development.

3.5 Suburban Light Industrial & Temporary Engineering Power Supply

The 250kVA high-capacity 7.2kV pole mounted transformer is specially tailored for suburban small light industrial workshops, rural small processing factories and field temporary engineering power supply. It meets the continuous high-load single-phase power demand of light industrial production equipment and construction temporary facilities. With strong environmental adaptability and stable overload performance, it can cope with long-term fluctuating loads of industrial production and short-term peak loads of engineering construction, realizing multi-scenario universal power conversion for outdoor single-phase power distribution systems.

4. Core Product Features

4.1 Full-Capacity Gradient Coverage for Precise Load Matching

This single phase pole mounted distribution transformer series covers seven mainstream industrial capacities: 10kVA, 25kVA, 37.5kVA, 50kVA, 100kVA, 150kVA and 250kVA, achieving full coverage of all low and medium single-phase power distribution scenarios. The refined capacity gradient realizes one-to-one matching with different load levels: low-capacity specifications adapt to ultra-light scattered loads, medium-capacity models fit conventional residential and commercial loads, and high-capacity units meet concentrated cluster and light industrial high-load demands. Users can select targeted models according to actual peak load and future load growth, completely avoiding capacity waste or insufficient power supply.

4.2 Standard 7.2kV Voltage Conversion & Stable Output Performance

Specially optimized for global 7.2kV medium-voltage overhead power grids, this 7.2kV power transformer adopts professionally calibrated voltage ratio design, ensuring accurate and stable step-down conversion under long-term fluctuating load conditions. Different from multi-voltage general transformers, it is highly targeted for 7.2kV grid terminal distribution, with no output voltage deviation or phase imbalance issues. Fully compliant with ANSI and IEC power distribution standards, it can perfectly adapt to standardized single-phase power grid systems in North America, Southeast Asia and other global regions, ensuring compliant grid connection and stable end-user power supply.

4.3 Ultra-Low Loss & High Energy-Saving Efficiency

Adopting high-grade low-loss silicon steel core and high-purity copper winding process, this oil immersed pole mounted transformer effectively reduces core no-load loss and winding load loss during continuous operation. The optimized closed magnetic circuit structure eliminates magnetic flux leakage and abnormal heat generation, maintaining high power conversion efficiency even under long-term partial load operation common in scattered single-phase power grids. Compared with traditional old-fashioned transformers, it significantly reduces power transmission and conversion loss, effectively lowering long-term operational energy consumption costs for power utilities and end users.

4.4 Fully Sealed Oil Immersed Structure & Superior Weather Resistance

Equipped with fully sealed welded steel oil tank and corrugated natural heat dissipation structure, the transformer cancels the traditional open conservator design, completely isolating internal insulating oil from external humid air, dust and corrosive substances. The outer shell is coated with weather-resistant and anti-corrosion protective paint, which can resist strong wind impact, rain erosion, ultraviolet aging and high-low temperature alternating changes. It can operate stably in outdoor open-air environments all year round, adapting to rural, suburban and field harsh working conditions with extremely low environmental failure rate and strong outdoor adaptability.

4.5 Compact Pole-Mounted Layout & Convenient On-Site Installation

Optimized for utility pole installation, the single phase overhead transformer features compact overall layout and lightweight body, with standardized mounting brackets and reserved installation ports. It can be quickly fixed on concrete or steel poles without occupying ground space, saving construction land resources and avoiding pedestrian safety hazards. The internal integral winding fastening technology enhances mechanical vibration resistance, ensuring structural stability during long-term outdoor wind vibration and load fluctuation operation, with low installation difficulty and short project construction cycle.

4.6 Complete Safety Protection & High Operational Reliability

Integrating built-in lightning protection, overload fuse protection and overpressure relief devices, this 7.2kV distribution transformer can effectively resist outdoor lightning surges, instantaneous short-circuit currents and grid voltage fluctuations. The multi-layer composite insulation structure improves internal insulation strength, avoiding insulation breakdown and equipment burnout under medium-voltage continuous operation. The low partial discharge design ensures safe and reliable unattended outdoor operation, meeting strict international outdoor power equipment safety standards and reducing grid fault risks.

4.7 Low Maintenance & Long Service Life

With mature and reliable internal structure and no fragile vulnerable electronic parts, this oil immersed single phase transformer has an extremely low daily failure rate. The fully sealed structure avoids frequent insulating oil replacement and internal cleaning work, and daily maintenance only requires regular oil level inspection, sealing performance check and radiator dust cleaning. It supports long-term unattended outdoor operation, greatly saving later operation and maintenance manpower and material costs, with high comprehensive cost performance in single-phase power distribution projects.

5. Frequently Asked Questions (FAQ)

Q1: How to choose the right capacity from 10kVA, 25kVA, 37.5kVA, 50kVA, 100kVA, 150kVA and 250kVA 7.2kV pole mounted transformers?

Capacity selection depends on on-site actual peak load, power supply coverage and future load expansion plans. The 10kVA and 25kVA models are suitable for single remote households, independent field monitoring equipment and ultra-small scattered single-phase loads with stable low power consumption. The 37.5kVA and 50kVA are universal conventional capacities, ideal for ordinary rural households and small street commercial facilities. The 100kVA and 150kVA specifications fit multi-household residential clusters and community public facility concentrated loads. The 250kVA high-capacity transformer is recommended for suburban light industrial workshops and large-scale clustered commercial power supply scenarios. It is advised to reserve 10%–20% capacity margin to cope with future electrical equipment upgrades and load growth.

Q2: What are the core advantages of 7.2kV single phase pole mounted transformers compared with other voltage grade pole transformers?

7.2kV is one of the most mainstream medium-voltage grades for global rural and suburban overhead power distribution grids, with wider grid compatibility than other non-standard voltage transformers. This dedicated 7.2kV power transformer features targeted voltage ratio calibration, no voltage mismatch or power loss during grid connection, and more stable output than general multi-voltage transformers. Matched with full-range capacity specifications, it can cover all single-phase low-load to medium-high load scenarios. In addition, its professional anti-corrosion and lightning protection design is more suitable for long-distance outdoor overhead transmission and unattended operation, with lower failure rate and longer service life in rural and suburban grid projects.

Q3: What daily maintenance work is required to ensure long-term stable outdoor operation of oil immersed pole mounted transformers?

Daily maintenance for outdoor single phase pole mounted distribution transformers is standardized and simple, focusing on three key inspection points. First, regularly check the oil tank welding seams, sealing gaskets and terminal connection parts to eliminate insulating oil leakage hidden dangers, observe oil level height and oil clarity, and replace deteriorated and turbid insulating oil in time to ensure insulation and heat dissipation performance. Second, clean dust and debris on the corrugated radiator surface regularly to keep the natural cooling system unobstructed and prevent equipment overheating during peak load operation. Third, periodically test winding insulation resistance and output voltage stability, check the integrity of lightning protection and overload protection devices, and troubleshoot abnormal operating noise and temperature rise to ensure year-round safe and stable operation.