Single Phase Pole Mounted Transformer | 69KV & 13.8KV Input, 120V/240V/440V Output
Single Phase Pole Mounted Transformer | 69KV & 13.8KV Input, 120V/240V/440V Output Oil Immersed Distribution Transformer
1. Product Description
This single phase pole mounted transformer is a professional oil immersed overhead distribution transformer engineered for high-voltage and medium-voltage power grid step-down conversion, featuring dual input voltage options of 69KV ultra-high voltage and 13.8KV medium voltage. Designed for outdoor pole installation, this heavy-duty single phase power transformer delivers versatile low-voltage output including standard 120V, 240V dual residential voltage and 440V industrial voltage, fully complying with ANSI, IEEE and IEC international power distribution standards. It is a widely used overhead power transformation device optimized for North American, Southeast Asian and global regional single-phase power grid systems.
Manufactured with industrial-grade craftsmanship, the pole mounted oil immersed transformer adopts high-permeability low-loss silicon steel core and high-purity copper winding structure, effectively reducing no-load loss and operating temperature rise during long-term continuous operation. Equipped with mature ONAN oil-natural air-natural cooling system and fully sealed corrosion-resistant oil tank, the equipment eliminates oil leakage, dust intrusion and moisture erosion issues that commonly occur in traditional open-type transformers. Different from conventional single-specification distribution transformers, this model supports flexible switching between 69KV high-voltage input and 13.8KV medium-voltage input, solving the voltage matching problem of multi-grade overhead transmission lines.
Optimized for global power frequency adaptation, the single phase overhead transformer stably operates under both 50Hz and 60Hz grid frequencies, perfectly adapting to mainstream overseas power system standards. The dual 120V/240V split-phase output meets civil power demands, while the independent 440V output covers light industrial power consumption scenarios, realizing integrated power distribution for residential, commercial and small industrial loads. With compact pole-mounted structure, lightweight design and strong weather resistance, this 69KV/13.8KV single phase transformer is the preferred cost-effective solution for rural power grid renovation, suburban overhead distribution and remote area power supply projects.
2. Core Product Purposes
The core purpose of this single phase pole mounted oil immersed transformer is to realize safe, stable and low-loss step-down voltage conversion and terminal power distribution for 69KV ultra-high voltage and 13.8KV medium-voltage overhead power grids, providing standardized 120V, 240V and 440V power for civil living, commercial facilities and light industrial equipment.
In actual power grid operation, this high-performance overhead transformer undertakes two key power transformation tasks. First, it serves as a high-precision step-down device for high and medium voltage overhead lines, converting 69KV long-distance transmission ultra-high voltage and 13.8KV regional medium distribution voltage into usable low voltage, solving the problem of unmatchable high grid voltage for terminal power consumption equipment. The customized 120V/240V dual output design supports split-phase power supply, which can independently supply power for low-power household equipment and high-power electrical appliances, improving the refinement of civil power distribution.
Second, the 440V industrial voltage output supplements the light industrial power supply demand of suburban and rural scattered factories, avoiding the need for additional industrial transformers for small-load industrial scenarios. Beyond basic voltage conversion, this low-loss pole mounted transformer stabilizes grid operation status, suppresses overhead line voltage fluctuation and harmonic interference, and reduces electric energy loss during long-distance power transmission and conversion. With reliable short-circuit resistance and lightning protection performance, it effectively buffers surge current caused by grid lightning strikes and load switching, protects terminal electrical equipment, and ensures continuous and safe power supply for scattered power consumption areas.
3. Typical Application Scenarios
3.1 Rural & Suburban Residential Power Distribution
This single phase pole mounted transformer is most widely applied in rural overhead power grids and suburban residential block power supply projects. Most regional overhead power transmission systems adopt 13.8KV medium voltage or 69KV high-voltage long-distance power supply modes, while residential areas require standard 120V/240V split-phase power. The pole-mounted installation method is highly suitable for scattered rural households and low-density suburban communities, with simple installation and low construction cost. It stably provides daily power for household lighting, household appliances and living facilities, and effectively solves the problems of unstable voltage and high power loss in remote rural power supply.
3.2 Light Industrial & Small Commercial Power Supply
Equipped with independent 440V industrial output voltage, this 69KV/13.8KV oil immersed transformer perfectly matches the power demand of suburban small processing factories, workshop equipment, rural agricultural product processing bases and street-side commercial facilities. Small light industrial loads do not require large three-phase transformer equipment, and this single phase pole mounted transformer can directly provide stable 440V industrial power, reducing redundant equipment investment. Meanwhile, the 120V/240V output can supply power for factory office areas and commercial store facilities, realizing dual-purpose power supply for production and daily use.
3.3 Remote Area & Field Engineering Power Supply
With strong environmental adaptability and ultra-high voltage adaptation capability, the transformer is ideal for remote mountainous areas, field construction sites, highway maintenance stations and mining temporary power supply scenarios. Remote areas generally rely on 69KV ultra-high voltage long-distance overhead transmission, and this professional single phase step-down transformer can efficiently convert high voltage into usable low voltage for field engineering equipment, temporary living facilities and monitoring systems. The outdoor pole-mounted structure is wind-resistant, rain-proof and lightning-proof, adapting to harsh field working conditions and unattended long-term operation.
3.4 Overseas Regional Power Grid Construction & Renovation
Tailored for 60Hz overseas power grid standards and North American split-phase power specifications, this 13.8KV to 120V/240V pole transformer is widely used in overseas municipal power grid construction, old grid renovation and rural electrification projects. It perfectly adapts to the single-phase power distribution mode of foreign regional power systems, accurately matching local 120V low-power equipment and 240V high-power electrical facilities, as well as 440V small industrial equipment standards. It has become a mainstream supporting device for global overhead single-phase power grid optimization and upgrading.
4. Core Product Features
4.1 Dual High-Voltage Input & Multi-Voltage Output Matching
Different from ordinary single-input distribution transformers, this single phase pole mounted transformer supports dual input voltage of 69KV ultra-high voltage and 13.8KV medium voltage, covering long-distance high-voltage transmission and regional medium-voltage distribution scenarios. It provides three mainstream low-voltage outputs: 120V, 240V and 440V, realizing seamless matching of overseas civil split-phase power and light industrial power standards. The multi-voltage flexible design eliminates equipment adaptation limitations and meets diversified terminal power consumption demands with one single device.
4.2 Low Loss & High Energy-Saving Operation Performance
Adopting high-quality low-loss oriented silicon steel sheet core and precision pure copper winding process, this oil immersed overhead transformer effectively reduces no-load loss, load loss and magnetizing current. The optimized magnetic circuit structure avoids magnetic flux leakage, and the overall power conversion efficiency is far higher than traditional old-fashioned pole transformers. Even under long-term scattered load and fluctuating load operation, it maintains stable high-efficiency power conversion, effectively reducing long-term power consumption loss of power grids and lowering operation costs for power supply departments and users.
4.3 Fully Sealed Oil Immersed & Superior Weather Resistance
The whole machine adopts fully sealed welded oil tank and standard ONAN natural cooling system, with no oil conservator design, which effectively prevents rainwater, dust, humid air and corrosive substances from invading the interior. The outer shell is coated with weather-resistant and anti-corrosion protective paint, which can resist ultraviolet aging, strong wind impact, rain erosion and high-low temperature alternating changes. It stably operates in outdoor open-air environments for a long time, adapting to rural, suburban and field harsh working conditions, with low failure rate and strong environmental tolerance.
4.4 Professional Pole-Mounted Compact Structure
Designed specifically for overhead pole installation, the transformer features compact overall structure, small occupied space and lightweight body, which is convenient for on-site hoisting and fixed installation. Compared with ground-mounted transformers, it saves land resources and avoids ground occupation and pedestrian safety hazards. The internal winding adopts integral fastening technology, with strong mechanical stability, which can resist vibration and impact during long-term outdoor operation, ensuring structural safety and operational stability of pole-mounted equipment.
4.5 Strong Safety & Lightning Protection Capability
Equipped with standard overhead lightning protection structure, pressure relief protection device and overvoltage and overcurrent protection components, this single phase power transformer can effectively resist lightning surge and grid voltage surge in overhead lines. The multi-layer composite insulation structure improves internal insulation strength, avoiding insulation breakdown and equipment burnout caused by high-voltage impact. The low partial discharge design ensures safe and reliable long-term operation under 69KV and 13.8KV high-voltage working conditions, meeting strict international power safety standards.
4.6 Dual-Frequency Universal & Low Maintenance Cost
Optimized for global power frequency standards, the equipment supports stable operation of 50Hz and 60Hz power grids, with strong universality for domestic and overseas projects. The mature and reliable fully sealed structure avoids frequent oil replacement and internal cleaning work. Daily maintenance only requires regular oil level inspection, oil quality detection and sealing check, without complex professional operation. It supports long-term unattended outdoor operation, greatly saving later operation and maintenance manpower and material costs, with outstanding comprehensive cost performance.
5. Frequently Asked Questions (FAQ)
Q1: What is the difference between 69KV and 13.8KV input modes of this single phase pole mounted transformer?
The two input voltage modes share the same equipment structure, safety performance and output voltage specifications, with differences mainly in application scenarios and grid matching. The 13.8KV input is suitable for conventional regional medium-voltage overhead distribution grids, mostly used in suburban and township conventional power supply projects, featuring stable load and wide applicability. The 69KV ultra-high voltage input is tailored for long-distance cross-region overhead transmission lines and remote area power supply scenarios, which can effectively reduce line transmission loss and solve the problem of insufficient terminal voltage in long-distance power supply. Users need to select the input voltage mode strictly according to local overhead grid rated voltage standards.
Q2: How to reasonably match 120V, 240V and 440V output voltages in actual use?
The three output voltages correspond to different terminal power consumption scenarios. The 120V output is mainly used for low-power household equipment, lighting systems and small civilian electrical appliances, which is the mainstream low-voltage power standard for overseas families. The 240V voltage is applicable to high-power household electrical equipment, residential central air conditioning and commercial facility power supply, meeting high-load civil power demands. The independent 440V output is dedicated to suburban light industrial equipment, small processing machinery and commercial high-power electrical devices, realizing separate power supply for civil and industrial loads and avoiding voltage fluctuation caused by load mixing.
Q3: What key maintenance points ensure long-term stable operation of outdoor pole-mounted oil immersed transformers?
Outdoor pole-mounted equipment is affected by weather and environment, so daily maintenance focuses on three core points. First, regularly check the oil tank sealing performance and welding seams to eliminate hidden dangers of insulating oil leakage, and observe the oil level and oil clarity to replace deteriorated insulating oil in time to ensure insulation and heat dissipation performance. Second, clean the radiator surface dust and sundries regularly to keep the natural heat dissipation system unobstructed and prevent equipment overheating under high-load operation. Third, regularly test winding insulation resistance and output voltage stability, check the integrity of lightning protection and overvoltage protection devices, and troubleshoot abnormal noise and temperature rise to avoid grid operation faults and equipment damage.
