50kva 13.8kv to 120v/240v single phase Oil Immersed Transformer

50kva 13.8kv to 120v/240v single phase Oil Immersed Transformer

1. Product Description

The 50kVA 13.8kV to 120V/240V single phase oil immersed transformer is a standard ANSI and IEEE C57.12 compliant single-phase distribution transformer widely deployed in North American 13.8kV medium-voltage utility power grids. As a cost-effective mid-size oil-filled step-down transformer for residential and rural electrification projects, this 13.8kV single phase oil immersed transformer is engineered to safely step down 13.8kV medium transmission voltage into dual 120V and 240V split-phase low voltage, fully matching standard North American residential power usage and small commercial load requirements. Every unit undergoes strict factory testing for insulation integrity, loss performance and short-circuit withstand capability to ensure consistent field reliability under real grid operating conditions.

Built with low-loss grain-oriented silicon steel core and full copper windings, the 50kVA single phase 13.8kV to 120V/240V oil immersed power transformer maintains low no-load loss and stable temperature rise during daily cyclic loads. It adopts a fully sealed welded steel tank and traditional ONAN oil natural air natural cooling system, using non-PCB mineral insulating oil for internal insulation and heat dissipation. This sealed oil filled structure effectively prevents moisture ingress, dust accumulation and insulating oil aging during long-term outdoor exposure. Supporting both pole-mounted and pad-mounted installation, this compact single-phase distribution transformer delivers balanced efficiency, durability and economy, making it one of the most commonly specified transformers for 13.8kV suburban and rural power distribution upgrades.

2. Main Technical Parameters

The table below lists complete standardized technical parameters for the 50kVA 13.8kV to 120V/240V single phase oil immersed transformer. All electrical and mechanical specifications comply with NEMA, ANSI and DOE energy efficiency standards, covering rated performance, loss data, insulation level, voltage regulation and environmental adaptability for standard utility distribution applications:

3. Core Purpose

The core purpose of the 50kVA 13.8kV to 120V/240V single phase oil immersed transformer is to deliver reliable, low-cost medium-capacity voltage step-down conversion for 13.8kV overhead single-phase distribution networks. This practical oil-filled single-phase step-down transformer resolves the voltage mismatch between medium-voltage transmission lines and standard residential end loads, converting fluctuating 13.8kV grid voltage into stable 120V and 240V dual low-voltage power that meets North American residential electrical codes and daily consumption standards.

In routine utility grid operation, this single phase oil immersed distribution transformer performs essential functions including terminal voltage stabilization, minor harmonic suppression and circuit isolation. It balances dual 120V/240V output under variable household and small commercial loads, effectively reducing voltage drop and preventing equipment damage caused by unstable power quality. Optimized for decentralized single-phase power supply, it improves overall grid efficiency, lowers distribution losses, and ensures safe, compliant power delivery for scattered residential and light-load commercial users connected to 13.8kV rural and suburban power grids.

4. Application Scenarios

Thanks to its moderate 50kVA capacity, compact structure and excellent outdoor durability, the 50kVA 13.8kV/120V/240V single phase oil immersed power transformer is widely used in mainstream medium-light single-phase power supply scenarios across North American utility systems. It serves as the standard power transformation unit for rural electrification, community power distribution and outdoor facility power supply projects:

• Suburban & Rural Residential Power Supply: Ideal for single-family homes, scattered rural households and small residential clusters. The dual 120V/240V split-phase output perfectly matches North American household power habits, supporting daily lighting, household appliances and medium-power residential equipment operation with stable power quality.

• Small Light Commercial Power Distribution: Suitable for neighborhood retail stores, small offices, roadside service stations and community convenience facilities. It provides consistent single-phase power for commercial lighting, office devices and low-power commercial equipment without excessive energy waste.

• Rural Electrification & Grid Renovation: Widely applied in 13.8kV rural power grid upgrading and capacity expansion projects, replacing outdated high-loss old transformers to improve regional power supply reliability and reduce overall grid operating losses.

• Outdoor Public & Remote Facility Power: Perfect for remote monitoring stations, highway roadside facilities, scenic area equipment and small communication signal bases. Its all-weather outdoor performance supports long-term unattended operation in remote areas.

• Small Distributed Photovoltaic Grid Connection: Matched with small-scale residential rooftop photovoltaic systems, completing stable voltage conversion and grid-connected power regulation for decentralized new energy generation equipment to ensure safe and stable grid access.

• Temporary & Rural Infrastructure Power: Adaptable for rural road construction, public facility maintenance and temporary field engineering power supply, featuring quick installation and stable load adaptability for short-term and long-term operating demands.

5. Product Features

This 50kVA 13.8kV to 120V/240V single phase oil immersed transformer adopts mature ANSI-standard manufacturing and upgraded energy-saving design. With moderate rated capacity, reliable load performance and strong environmental adaptability, it is the most cost-effective choice for conventional medium-light single-phase distribution in 13.8kV power grids:

• Optimized Energy-saving Performance: Equipped with high-quality low-loss silicon steel core and pure copper winding structure, the transformer effectively reduces no-load magnetic loss and operational load loss. All loss indicators meet DOE premium energy efficiency requirements, helping power utilities cut long-term grid operation energy consumption and reduce daily operating costs.

• Stable Dual 120V/240V Split-phase Output: Precision single-phase winding layout ensures balanced and accurate dual voltage output. The built-in multi-grade off-circuit tap changer flexibly compensates for 13.8kV grid voltage deviation, suppressing voltage fluctuation and harmonic interference to guarantee stable terminal power quality for residential and commercial loads.

• Fully Sealed & Leak-proof Structure: Integral fully sealed welded steel tank completely isolates internal core, windings and insulating oil from external humid air, dust and corrosive substances. It prevents oil aging, moisture penetration and insulation degradation, eliminating common oil leakage faults of traditional open-type transformers.

• Superior All-weather Outdoor Adaptability: The whole machine adopts weather-resistant anti-corrosion electrostatic spraying coating, resisting ultraviolet aging, rain erosion, frost damage and wind-sand impact. It maintains stable electrical performance in high temperature, low temperature and high humidity environments, supporting year-round outdoor unattended operation.

• High Insulation & Lightning Protection: Strict 13.8kV medium-voltage insulation design with 95kV BIL lightning impulse resistance provides excellent over-voltage protection, lightning resistance and short-circuit impact resistance. It effectively avoids equipment failure caused by grid surge and external lightning strikes, improving overall power supply safety.

• Flexible Installation & Low Maintenance: Compact lightweight design supports both pole-mounted and pad-mounted installation, adapting to various field terrain and construction conditions. The fully sealed oil structure requires no frequent oil replacement, with simple daily inspection requirements and low long-term maintenance costs.

6. FAQ (Frequently Asked Questions)

Q1: What application scenarios fit the 50kVA 13.8kV 120/240V single phase oil immersed transformer best?

This 50kVA single phase oil immersed transformer is specifically optimized for medium-light single-phase loads in 13.8kV power grids. It is most suitable for single-family residential power supply, small community clusters and neighborhood light commercial facilities. Compared with smaller 37.5kVA models, it provides stronger overload tolerance for seasonal peak power use such as summer air conditioning and winter heating. Compared with larger 75kVA or 100kVA transformers, it avoids unnecessary no-load loss in conventional low-to-medium load scenarios, offering the best balance of power capacity, energy efficiency and cost for rural and suburban conventional single-phase distribution projects.

Q2: Can this 13.8kV single phase oil immersed transformer run stably in harsh outdoor weather?

Yes, this ANSI-certified oil immersed distribution transformer is fully engineered for harsh outdoor utility operating conditions. The fully sealed steel tank structure completely blocks external moisture and dust, preventing internal insulation damp and insulating oil deterioration during long-term outdoor exposure. The high-strength weatherproof shell resists ultraviolet aging, heavy rain erosion, freezing and high-temperature thermal aging. Adopting reliable ONAN self-cooling design, it maintains stable heat dissipation under rated load, supporting 24-hour continuous operation throughout all seasons and fully meeting long-term unattended outdoor power distribution requirements.

Q3: What routine maintenance does a 50kVA 13.8kV single phase oil immersed transformer require?

This medium-light capacity single-phase oil immersed transformer features low maintenance thresholds and stable long-term performance. Daily work mainly includes visual inspection of tank welding seams and sealing points to check for oil leakage, and confirmation of normal insulating oil level and clarity. Operators need to clean radiator surface dust regularly to ensure unobstructed heat dissipation and prevent overheating under peak loads. Periodic testing of winding insulation resistance and terminal voltage balance is recommended. Long-term overload operation should be avoided. With standardized simple routine maintenance, the transformer can achieve a stable service life of more than 20 years.