15kVA 25kVA 37.5kVA 50kVA 75kVA 100kVA 167kVA 250kVA Full Series Oil Immersed Distribution Transform
13.8kV Single Phase Pole Mounted Transformer | 15kVA 25kVA 37.5kVA 50kVA 75kVA 100kVA 167kVA 250kVA Full Series Oil Immersed Distribution Transformer
1. Product Description
The 13.8kV single phase pole mounted transformer is a standard oil immersed overhead distribution device widely deployed in North American, Southeast Asian and Latin American utility overhead power grids. Covering a complete range of practical capacity grades including 15kVA, 25kVA, 37.5kVA, 50kVA, 75kVA, 100kVA, 167kVA and 250kVA, this full-series single-phase pole mount transformer precisely matches all common single-phase load levels from ultra-light scattered household power consumption to medium centralized residential and small commercial power supply. Tailored for 13.8kV medium-voltage overhead line systems, it serves as the core terminal step-down equipment for outdoor single-phase power distribution networks.
Built in full compliance with ANSI and IEC international power industry standards, this 13.8kV pole mounted single-phase transformer adopts traditional reliable oil immersed cooling and insulation structure. It uses high-purity oxygen-free copper windings and high-performance cold-rolled grain-oriented silicon steel core, effectively reducing no-load loss and operational heat generation during long-term grid operation. Unlike bulky ground-mounted transformers, this overhead single-phase transformer features a streamlined compact body and dedicated pole mounting structure, which can be directly fixed on standard utility poles without complicated foundation construction. Every kVA specification from small 15kVA and 25kVA units to heavy-duty 167kVA and 250kVA models undergoes strict factory testing to guarantee consistent field stability and durability.
Engineered for long-term outdoor continuous operation, the sealed oil tank design isolates internal electrical components from external dust, moisture and ultraviolet erosion. This 13.8kV single-phase distribution transformer delivers stable medium-to-low voltage conversion, solving the common problems of long-distance overhead transmission voltage attenuation and unstable terminal power quality. As a mainstream overhead power conversion solution for rural electrification, suburban grid upgrading and decentralized light-load power supply projects, it has been widely recognized in global medium-voltage single-phase power distribution markets.
2. Core Product Features
2.1 Full Gradient KVA Capacity Coverage for Accurate Load Matching
This single phase pole mounted transformer series provides comprehensive capacity coverage spanning 15kVA to 250kVA, covering all frequently used specifications: 15kVA, 25kVA, 37.5kVA, 50kVA, 75kVA, 100kVA, 167kVA and 250kVA. The complete gradient model design allows engineers and contractors to select the exact kVA rating according to actual on-site peak load and future load growth, avoiding insufficient capacity or redundant power waste. Small-capacity 15kVA and 25kVA units fit ultra-light scattered loads such as single households and independent street lighting; medium specifications including 37.5kVA, 50kVA and 75kVA adapt to most conventional village and suburban residential loads; high-capacity 100kVA, 167kVA and 250kVA models perfectly serve densely populated communities and centralized small commercial power demand.
2.2 Standard 13.8kV Primary Voltage Grid Adaptability
Specially calibrated for 13.8kV medium-voltage overhead lines, this oil immersed pole mount transformer matches the most popular single-phase grid voltage standard in North America, South America and Southeast Asia. The fixed 13.8kV input design eliminates voltage mismatch risks in cross-regional power projects, ensuring smooth grid access and stable voltage conversion. Compared with multi-voltage adjustable transformers, the fixed standard voltage structure has simpler internal wiring, lower failure rate and more stable long-term operation performance, fully adapting to conventional 13.8kV overhead distribution network operating parameters.
2.3 Low Loss Energy-Saving & Stable Electromagnetic Performance
Optimized core lamination and balanced single-phase winding layout greatly suppress magnetic flux leakage and eddy current loss. This 13.8kV single-phase pole transformer maintains ultra-low no-load loss even during long-term light-load standby, which is extremely suitable for the intermittent and scattered load characteristics of rural and suburban single-phase power supply. Low operational power consumption effectively reduces long-term grid operating costs and line transmission loss, helping power utilities achieve energy-saving and efficient grid operation.
2.4 Outdoor Weatherproof & Fully Sealed Durable Structure
Designed for all-weather outdoor operation, the transformer adopts integrally welded fully sealed oil tank and heavy-duty anti-corrosion electrostatic spraying shell. It resists rain erosion, high-temperature ultraviolet aging, low-temperature freezing and dusty environmental interference, adapting to harsh open-air working conditions in rural areas, coastal zones and suburban industrial peripheries. The fully sealed structure prevents insulating oil deterioration and moisture ingress, avoiding common faults such as insulation breakdown and partial discharge, greatly improving equipment operational safety and service life.
2.5 Easy Pole Installation & Low Field Maintenance
Equipped with standard integrated mounting brackets, the single phase pole mounted transformer can be quickly installed on concrete poles, steel poles and wooden utility poles, saving construction time and foundation investment compared with pad-mounted transformers. The oil natural air natural cooling system operates passively without auxiliary heat dissipation equipment. The maintenance-free sealed design reduces daily inspection and maintenance workload, and regular simple field checks can ensure long-term stable operation, effectively lowering later operational costs for power grid operators.
3. Core Purpose
The core purpose of the 13.8kV 15kVA–250kVA single phase pole mounted transformer is to implement safe, efficient and stable medium-voltage step-down conversion and terminal power distribution for overhead single-phase power grid systems. It converts 13.8kV medium-voltage electric energy transmitted by overhead trunk lines into standard low-voltage single-phase power, providing compliant and stable power supply for residential households, agricultural equipment and small commercial electrical facilities.
In daily power grid operation, full-series models including 37.5kVA, 50kVA, 75kVA, 100kVA and 167kVA undertake key functions of voltage stabilization, load balancing and grid fault isolation. They effectively resolve common single-phase grid problems such as long-distance transmission voltage drop, unbalanced terminal load and instantaneous voltage surge. By stabilizing output power quality, the equipment protects civilian electrical appliances and small industrial devices from damage caused by grid fluctuation, improving the overall power supply reliability of regional overhead distribution networks.
This oil immersed pole mount transformer also optimizes power transmission efficiency, reduces line loss during voltage conversion, and supports load capacity expansion for old power grids. It serves as indispensable terminal power conversion equipment for rural power grid renovation, suburban power supply expansion and remote area electrification projects.
4. Application Scenarios
4.1 Rural & Suburban Residential Power Distribution
This 13.8kV single phase pole mounted transformer full series is the primary equipment for rural electrification and suburban community power supply. Small-capacity 15kVA and 25kVA transformers are widely used for single remote rural households and scattered villa power supply; 37.5kVA, 50kVA and 75kVA specifications perfectly match ordinary village clusters and suburban residential groups; high-capacity 100kVA, 167kVA and 250kVA units are ideal for densely populated residential blocks with large centralized power consumption. The overhead installation method saves land resources and adapts to scattered residential distribution characteristics, ensuring 24-hour stable civilian power supply.
4.2 Agricultural Production & Rural Public Facilities
It is extensively applied in farmland irrigation systems, greenhouse planting bases, livestock breeding farms and rural public infrastructure. Agricultural power loads are mostly scattered and intermittent, which perfectly fits the operational advantages of single-phase pole mount transformers. The excellent outdoor weather resistance enables stable operation in field open-air environments, providing reliable power support for agricultural water pumps, ventilation systems, rural street lighting and village monitoring equipment, guaranteeing continuous operation of agricultural production and rural public services.
4.3 Small Commercial & Municipal Auxiliary Power Supply
Medium and high-capacity models from 75kVA to 250kVA are commonly deployed for urban street shops, community service centers, roadside convenience facilities and municipal auxiliary equipment power distribution. Small commercial single-phase loads feature frequent start-stop and unstable power consumption. This 13.8kV oil immersed distribution transformer can effectively suppress grid harmonic interference and voltage fluctuation, maintaining stable power supply quality for small commercial equipment and municipal facilities, and supporting stable operation of urban grassroots commercial and public service systems.
4.4 Remote Area Power Supply & Power Grid Upgrading Projects
The equipment is widely used in remote mountainous areas, island areas and old overhead power grid renovation projects. The 13.8kV medium-voltage input adapts to long-distance overhead power transmission, effectively reducing line power loss and improving remote power supply quality. Flexible full-kVA coverage solves the problems of insufficient capacity and unstable voltage of aging power grids. The convenient pole-mounted installation adapts to complex terrain conditions in remote areas, effectively expanding power grid coverage and improving power supply stability for off-grid and remote user areas.
5. Frequently Asked Questions (FAQ)
Q1: How to select the proper kVA capacity for 13.8kV single phase pole mounted transformers?
Capacity selection depends on actual peak load quantity and reserved load growth margin. 15kVA and 25kVA are suitable for single remote households, independent street lights and ultra-light agricultural loads. 37.5kVA, 50kVA and 75kVA are the most versatile mainstream options for regular village communities and suburban residential areas. 100kVA, 167kVA and 250kVA high-capacity models are recommended for densely populated neighborhoods, large breeding bases and centralized small commercial zones. It is recommended to reserve 15%–20% extra capacity to avoid long-term full-load operation and extend transformer service life.
Q2: What are the key advantages of 13.8kV oil immersed pole mounted transformers compared with other distribution transformers?
Compared with dry-type transformers and ground-mounted transformers, this 13.8kV single-phase pole mount transformer has obvious practical advantages for overhead grid scenarios. The pole-mounted installation saves land occupation and reduces civil engineering costs, while the oil immersed cooling structure provides better heat dissipation and overload resistance for long-term outdoor operation. The full 15kVA–250kVA capacity coverage meets diversified load demands, and the standard 13.8kV voltage design ensures high compatibility with mainstream American and Southeast Asian power grids. In addition, it features lower no-load loss, stronger weather resistance and simpler daily maintenance, making it more cost-effective for rural and suburban overhead distribution projects.
Q3: What daily maintenance does outdoor 13.8kV single phase pole mounted transformer need?
This fully sealed oil immersed transformer requires minimal routine maintenance, suitable for unattended outdoor field operation. Field staff only need to conduct regular visual inspections to check for oil leakage, shell deformation and damaged wiring terminals. Periodically clean dust and debris on the radiator surface to keep heat dissipation smooth and prevent high-temperature overload. Regularly test insulation resistance and grounding performance to eliminate hidden insulation and safety risks. Avoid long-term overload operation exceeding rated kVA value. Simple standardized maintenance can effectively reduce failure rate and ensure long-term stable power conversion of the 13.8kV single-phase distribution transformer.
