37.5kva 13.8kv to 120v/240v single phase Oil Immersed Transformer

1. Product Description

The 37.5kVA 13.8kV to 120V/240V single phase oil immersed transformer is a standard ANSI-certified single-phase distribution transformer widely used in North American 13.8kV medium-voltage power distribution networks. As a reliable oil-filled step-down transformer for residential and rural power grids, this single phase 13.8kV 120/240V oil immersed transformer is professionally engineered to convert 13.8kV medium high voltage grid power into dual 120V and 240V low-voltage output, fully matching the standard voltage requirements of North American household electrical systems and small commercial equipment. Manufactured strictly in accordance with ANSI/IEEE C57.12 series standards and DOE energy efficiency regulations, this oil immersed single phase distribution transformer undergoes rigorous factory testing to ensure stable performance in long-term outdoor continuous operation.

Adopting high-quality low-loss grain-oriented silicon steel core and high-purity oxygen-free copper winding coils, the 37.5kVA single phase 13.8kV to 120/240V oil immersed power transformer effectively reduces no-load loss and operational heat generation during daily grid operation. Equipped with PCB-free mineral insulating oil immersion cooling system and fully sealed welded steel tank structure, this compact oil filled transformer completely isolates internal core and windings from external moisture, dust and air oxidation. Different from three-phase power transformers, this single-phase power transformation equipment features simple circuit structure, low operating noise and flexible installation methods, making it the most practical and cost-effective power solution for decentralized single-phase power supply in 13.8kV overhead power grids.

2.Technical Parameters

3. Core Purpose

The core purpose of the 37.5kVA 13.8kV to 120V/240V single phase oil immersed transformer is to provide safe, stable and energy-efficient single-phase voltage step-down conversion for 13.8kV medium-voltage overhead power distribution systems. This practical oil-filled single-phase step-down transformer solves the voltage level mismatch between high-voltage transmission lines and civilian single-phase electrical loads, converting unstable 13.8kV medium voltage into standard dual 120V and 240V low-voltage power that fully complies with North American residential and light commercial power supply specifications.

In daily power grid operation, this single phase oil immersed distribution transformer undertakes key functions of grid voltage stabilization, harmonic suppression and circuit safety isolation. It can effectively balance dual 120V/240V output circuits, reduce voltage fluctuation caused by load switching, and avoid electrical equipment damage and power failure risks. Designed for medium-capacity decentralized single-phase loads, it provides continuous and reliable power guarantee for scattered residential users and small commercial facilities, optimizing the power supply stability and energy-saving efficiency of rural and suburban 13.8kV power grids.

4. Application Scenarios

With moderate load capacity, flexible installation and excellent outdoor weather resistance, the 37.5kVA 13.8kV/120V/240V single phase oil immersed power transformer covers mainstream medium single-phase power supply scenarios in North American power grids. It is the most widely used supporting equipment for 13.8kV rural and suburban power grid construction and renovation projects:

• Suburban & Rural Residential Power Supply: Ideal for scattered rural households, suburban single-family villas and remote residential communities. It provides standard 120V lighting voltage and 240V high-power electrical voltage for household appliances, fully adapting to North American residential daily power consumption habits and meeting medium household load demands.

• Small Light Commercial Power Distribution: Suitable for suburban retail stores, street convenience shops, small office rooms and community service stations. It stably supplies power for commercial lighting, office equipment and small business electrical devices, ensuring long-term stable operation of small commercial facilities.

• Remote Field Facility Power Supply: Widely applied in field monitoring equipment, forestry observation stations, highway roadside facilities and remote communication signal base stations. With excellent all-weather outdoor adaptability, it supports long-term unattended power supply for field low-power equipment.

• 13.8kV Rural Power Grid Upgrading: Used for old grid reconstruction and capacity expansion of North American standard 13.8kV medium-voltage power grids. It replaces outdated high-loss transformers, improves regional power supply quality and reduces grid operation energy consumption.

• Small Distributed Photovoltaic Grid Connection: Matched with residential rooftop photovoltaic power generation systems in rural and suburban areas. It completes stable voltage conversion and grid-connected power regulation for decentralized new energy equipment, improving new energy grid access stability.

• Outdoor Temporary Engineering Power: Adaptable for temporary power guarantee of rural infrastructure maintenance, outdoor public facility renovation and small field construction projects, featuring quick installation and stable load operation performance.

5. Product Features

This 37.5kVA 13.8kV to 120V/240V single phase oil immersed transformer adopts ANSI standard optimized design and mature industrial manufacturing technology. It has outstanding comprehensive advantages in energy-saving performance, operational stability, safety protection and environmental adaptability, fully adapting to long-term outdoor operation requirements of 13.8kV medium-voltage single-phase power grids:

• Low Loss & High Energy Saving Performance: Adopts high-permeability low-loss silicon steel core and high-purity copper winding structure, which effectively reduces no-load magnetic loss and load copper loss. The overall power consumption is far lower than industry standard values, realizing long-term low-energy operation and effectively reducing daily grid operation costs for power supply departments.

• Dual Stable Voltage Output: Professional single-phase coil layout design ensures balanced and accurate 120V and 240V dual low-voltage output. The built-in multi-grade off-circuit voltage regulator can adapt to regional 13.8kV grid voltage deviation, effectively suppress voltage surge and harmonic interference, and ensure terminal electrical equipment operates under rated stable voltage.

• Fully Sealed & Weather-resistant Structure: Integral fully sealed steel oil tank structure prevents insulating oil aging, moisture ingress and dust pollution. The whole machine adopts high weather-resistant anti-corrosion electrostatic spraying coating, resisting ultraviolet aging, rain erosion, frost and snow damage, supporting all-weather outdoor continuous operation.

• High Insulation & Lightning Protection: Strict 13.8kV medium-voltage insulation design with 95kV BIL lightning impulse withstand level provides excellent over-voltage protection and lightning resistance. The equipment has strong short-circuit impact resistance and low operational failure rate, effectively ensuring power grid and terminal equipment operational safety.

• Low Noise & Environmentally Friendly Operation: Optimized core vibration reduction structure and mute winding process greatly reduce operating noise, meeting NEMA environmental protection standards. The low-noise operation feature makes it suitable for residential and suburban living areas without causing noise disturbance.

• Flexible Installation & Low Maintenance Cost: Compact lightweight structure supports both pole-mounted and pad-mounted installation, adapting to different site terrain and installation conditions. The fully sealed design requires no frequent oil replenishment, and standardized internal structure simplifies daily inspection and maintenance work, lowering later operational and maintenance expenses.

6. FAQ (Frequently Asked Questions)

Q1: What are the advantages of 37.5kVA single phase oil immersed transformers for 13.8kV power grids?

The 37.5kVA 13.8kV 120/240V single phase oil immersed transformer is specially optimized for medium single-phase decentralized loads in 13.8kV power grids. Compared with smaller-capacity transformers, it has stronger overload resistance and more stable operation under medium household and small commercial peak loads. Different from three-phase transformers, it can directly output standard 120V/240V dual voltage required by North American users, with simpler structure, lower no-load loss and higher cost performance. It can effectively solve the problem of insufficient power supply capacity of rural scattered users and is the most suitable power transformation equipment for 13.8kV suburban and rural power distribution.

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

Yes, this ANSI standard 37.5kVA oil immersed distribution transformer is fully optimized for harsh outdoor working conditions. The fully sealed oil tank structure completely isolates internal insulation components from external humid air, dust and corrosive substances, avoiding insulation damp failure and insulating oil deterioration. The high-strength weather-resistant outer coating can resist long-term ultraviolet radiation, heavy rain erosion, low-temperature freezing and high-temperature aging. With a wide operating temperature range of -40℃ to +45℃, it can operate continuously and stably in extreme seasonal weather, fully meeting long-term unattended outdoor power distribution operation requirements.

Q3: What routine maintenance does a 13.8kV 37.5kVA single phase oil immersed transformer need?

This medium-capacity single-phase oil immersed transformer has low daily maintenance threshold and stable operational performance. Daily routine work mainly includes visual inspection of the oil tank for oil leakage and confirmation of normal insulating oil level and clarity. Users need to regularly clean dust and sundries on the radiator surface to ensure unobstructed heat dissipation and prevent equipment overheating faults. Periodically test winding insulation resistance and check the tightness of high and low voltage wiring terminals. Under normal operating conditions, insulating oil can be used for a long time without frequent replacement. With standardized simple maintenance, the equipment service life can reach more than 20 years.