Single Phase Oil Immersed Transformers 50KVA 250KVA 13.8KV Pole Mounted Transformer Power Transforme
1. Product Overview
The Single Phase Oil Immersed Transformers 50KVA 250KVA 13.8KV Pole Mounted Transformer series are utility-grade single-phase distribution power transformers engineered for overhead power distribution networks. Available in two mainstream rated capacities of 50KVA and 250KVA, this 13.8KV pole mounted transformer adopts mature oil immersed cooling technology, serving as essential terminal voltage conversion equipment for medium-voltage single-phase power systems. Manufactured in compliance with ANSI and IEC international standards, these single-phase power transformers reliably step down 13.8KV high overhead line voltage to standard low-voltage output for residential, commercial and light industrial power consumption.
Designed specifically for outdoor pole-mounted installation, the 50KVA and 250KVA single phase oil immersed transformers feature compact structure, fully sealed insulation design and outstanding environmental adaptability. As core equipment in rural and suburban power grid distribution systems, they effectively solve voltage mismatch and long-distance transmission voltage drop issues, delivering stable, safe and low-loss power conversion performance. With flexible capacity options and durable construction, this 13.8KV pole mounted power transformer series covers small to medium single-phase load demands, becoming one of the most widely used overhead distribution transformer solutions for global power grid construction and renovation projects.
2. Core Product Features
2.1 Dual Capacity Matching for Diversified Load Demands
This single phase oil immersed transformer series provides two classic capacity specifications: 50KVA and 250KVA, covering most single-phase power distribution scenarios. The 50KVA pole mounted transformer is tailored for small-load decentralized power supply, suitable for individual residential clusters and small civilian facilities. The upgraded 250KVA model supports larger centralized single-phase loads, meeting the power demand of small commercial sites and centralized rural communities. Both capacity specifications maintain consistent 13.8KV high-voltage input performance, ensuring unified voltage conversion accuracy and operational stability for different load scales.
2.2 Reliable 13.8KV High-Voltage Step-Down Performance
As a professional 13.8KV pole mounted power transformer, this oil immersed equipment stably converts 13.8KV medium-high voltage from overhead transmission lines to standard low-voltage power for end-users. The optimized winding and iron core structure realizes precise voltage regulation with ultra-low output deviation, effectively resisting grid voltage fluctuation caused by seasonal power consumption peaks and long-distance line transmission. It maintains continuous and stable voltage output under frequent load changes, greatly improving terminal power supply quality and avoiding electrical equipment damage caused by unstable voltage.
2.3 High-Efficiency Oil Immersed Sealed Cooling System
Adopting a fully sealed oil immersed cooling structure, this single-phase distribution transformer uses high-purity insulating mineral oil for circulating heat dissipation and insulation protection. The high-quality grain-oriented silicon steel core effectively reduces no-load loss and operating heat generation, achieving energy-saving and low-consumption operation. The fully welded corrugated oil tank completely isolates internal windings and core from external air, moisture and dust, preventing insulating oil aging, oxidation and moisture absorption. This design avoids insulation performance degradation and internal short-circuit faults, greatly extending the service life of the pole mounted transformer and reducing daily maintenance workload.
2.4 Outdoor Pole-Mounted Weatherproof Structure
Specially optimized for overhead pole installation, the 50KVA/250KVA single phase oil immersed transformer features a lightweight, high-strength integrated structure with anti-corrosion and weather-resistant surface coating. It can resist extreme outdoor environments including ultraviolet radiation, rain erosion, wind and sand impact, and low-temperature freezing, supporting long-term exposed outdoor operation. The standardized pole mounting bracket enables fast and convenient installation without complex foundation construction, saving engineering land occupation and construction costs, which is far more flexible and cost-effective than traditional ground-mounted transformers for decentralized power distribution.
2.5 Safe and Stable Operation with Low Failure Rate
This 13.8KV pole mounted power transformer is equipped with multiple built-in safety protection mechanisms including over-current protection, short-circuit resistance and over-temperature protection. It has strong overload capacity and short-circuit withstand capability, which can automatically respond to sudden grid faults and load surges to ensure power supply safety. The pure copper winding configuration ensures excellent electrical conductivity and thermal stability, avoiding overheating burnout during long-term continuous operation. The overall structure is firm and shock-resistant, with low operating noise and extremely low daily failure rate, realizing unattended stable operation for outdoor power grid systems.
3. Core Uses
The 50KVA 250KVA Single Phase Oil Immersed 13.8KV Pole Mounted Transformer is dedicated to single-phase medium-voltage power conversion and terminal power distribution in overhead power grid systems. Its core function is to step down 13.8KV high-voltage electric energy from overhead transmission lines to standard civilian and commercial low-voltage power, realizing safe voltage matching between medium-voltage power grids and single-phase terminal electrical equipment.
In power system operation, this single-phase power transformer optimizes terminal power supply quality, stabilizes output voltage, and reduces power transmission loss in low-voltage distribution lines. It effectively solves the problems of low voltage and unstable power supply in remote areas and scattered power consumption points. The 50KVA specification meets daily civilian small-load power demands, while the 250KVA model supports medium-load single-phase power consumption, covering diversified power supply needs from residential living to small commercial production. In addition, it can also be used for voltage stabilization and power guarantee of temporary outdoor power projects, improving the coverage and reliability of single-phase power distribution networks.
4. Main Application Scenarios
4.1 Rural and Remote Residential Power Distribution
This 13.8KV pole mounted single phase oil immersed transformer is the mainstream power distribution equipment for rural power grids, remote villages and scattered residential areas. Most rural overhead power transmission systems adopt 13.8KV medium-voltage lines, and the 50KVA model is widely used for single-village and small cluster residential power supply, meeting daily power consumption of household lighting, electrical appliances and living equipment. The 250KVA transformer is suitable for large rural villages and centralized residential communities, solving the problem of insufficient power supply capacity in rural peak power consumption periods.
4.2 Suburban and Urban Fringe Grid Renovation
It is widely applied in suburban power grid upgrading, old community power grid reconstruction and urban fringe power capacity expansion projects. For suburban scattered single-family buildings and small residential blocks dominated by single-phase loads, this oil immersed pole mounted transformer efficiently completes 13.8KV voltage step-down conversion, optimizes local power grid structure, improves power supply stability, and eliminates hidden dangers of aging and low-capacity old power grids.
4.3 Small Commercial and Light Industrial Power Supply
The 250KVA single phase oil immersed power transformer is suitable for rural small processing workshops, roadside shops, rural service stations and other small commercial and light industrial scenarios. These scenarios are dominated by single-phase loads with medium power demand, and the stable low-loss operation performance of the transformer can continuously support small processing machinery, commercial lighting and office electrical equipment, ensuring stable and efficient commercial operation.
4.4 Outdoor Temporary and Special Scenario Power Guarantee
Thanks to its flexible pole-mounted installation and strong environmental adaptability, this 13.8KV pole mounted transformer is ideal for temporary power supply of field engineering, rural road construction, outdoor monitoring systems and remote communication base stations. It can quickly access 13.8KV overhead lines to provide stable single-phase low-voltage power for temporary outdoor equipment and engineering operations, with fast installation and reliable power supply effect.
4.5 Distributed New Energy Auxiliary Power Distribution
It is matched with small rural distributed photovoltaic power generation and micro wind power single-phase power generation systems, used for voltage matching and local power distribution. The transformer stabilizes the fluctuating voltage generated by new energy equipment, converts it into standard usable low voltage, improves new energy power utilization rate, and supports the popularization and stable operation of rural distributed new energy projects.
5. Frequently Asked Questions (FAQ)
5.1 How to choose between 50KVA and 250KVA single phase 13.8KV pole mounted transformers?
The capacity selection depends on actual load power demand and application scenarios. The50KVA single phase oil immersed transformer is suitable for small-load scenarios such as scattered rural single villages, small residential clusters and simple temporary power supply, which can fully meet daily civilian basic power consumption. The 250KVA pole mounted transformer is designed for medium-load scenarios including large rural communities, suburban residential blocks and small commercial workshops, supporting multiple high-power electrical equipment simultaneous operation. It is recommended to reserve 10%-20% load margin during selection to avoid long-term full-load operation and extend transformer service life.
5.2 What are the advantages of oil immersed pole mounted transformers compared with dry-type single-phase transformers?
For outdoor 13.8KV overhead power distribution scenarios, single phase oil immersed transformers have obvious comprehensive advantages. The oil immersed cooling system provides more efficient and stable heat dissipation effect, adapting to long-term outdoor high-temperature operation and intermittent overload operation. The fully sealed oil tank structure has better waterproof, dustproof and anti-corrosion performance, stronger environmental adaptability than dry-type transformers, and lower failure rate in harsh outdoor environments. In addition, oil immersed pole mounted transformers have lower manufacturing and maintenance costs, longer service life and higher cost performance, which is the mainstream choice for rural and suburban overhead power grid distribution.
5.3 What is the standard working voltage and adaptation range of this 13.8KV pole mounted power transformer?
This series of pole mounted transformers takes 13.8KV as the rated primary high-voltage input, which is compatible with global mainstream 13.8KV medium-voltage overhead power grid standards. It supports a certain range of grid voltage fluctuation and can operate stably under slight voltage deviation of overhead lines. After professional step-down conversion, it outputs standard single-phase low voltage to meet conventional civilian and light industrial power consumption standards. The whole machine adapts to ambient temperature of -25℃ to +40℃ and outdoor humid and dusty environments, with strong environmental tolerance and stable long-term operating performance.
