Single Phase Pole Mounted Transformer 75kva 13.8Kv to 120V/240V

Single Phase Pole Mounted Transformer 75kva 13.8Kv to 120V/240V

1. Technical Parameter

2. Product Description

Single Phase Pole Mounted Transformer 75kva 13.8Kv to 120V/240V is a standard oil immersed single-phase distribution transformer engineered for North American and international single-phase power grid systems. As a mainstream outdoor pole-mounted power transformation device, this 75kVA oil filled transformer is professionally designed to step down 13.8kV medium-voltage overhead line power into standard 120V/240V split-phase low voltage, perfectly matching residential, commercial and remote site power consumption standards.

Manufactured with low-loss silicon steel core and high-conductivity copper windings, this 13.8kV single-phase pole transformer effectively reduces no-load and load operating losses, delivering stable and energy-efficient power conversion performance. Adopting mature ONAN natural oil cooling technology, the internal insulating oil circulates freely to dissipate heat evenly, ensuring continuous stable operation under full-load and long-term standby conditions. The fully sealed heavy-duty steel tank structure prevents moisture, dust and corrosive substances from entering the interior, avoiding insulating oil aging and insulation degradation caused by long-term outdoor exposure.

This 75kVA 120/240V step-down transformer features dual low-voltage output design, supporting independent 120V and 240V power supply to meet mixed load demands of different electrical equipment. All units undergo strict factory testing including voltage ratio calibration, insulation resistance testing, lightning impulse testing and temperature rise testing. With compact structure, lightweight body and strong environmental adaptability, this outdoor single-phase distribution transformer is the most cost-effective solution for decentralized small-capacity power distribution and rural grid electrification projects.

3. Core Product Features

3.1 Dual Voltage Split-phase Output Design

Different from single-voltage transformers, this single phase pole mounted transformer supports 120V and 240V dual output. The 120V voltage suits low-power equipment such as household lighting, sockets and small electronic devices, while the 240V output adapts to high-power loads including air conditioners, water heaters and small commercial machinery. The flexible dual-voltage design covers most single-phase power consumption scenarios, greatly improving equipment utilization and avoiding redundant power distribution configuration.

3.2 Low Loss & Energy Saving Operation

Optimized core lamination process and high-purity copper winding layout minimize magnetic flux leakage and operating power consumption. Compared with traditional old-fashioned single-phase transformers, this 75kVA oil immersed transformer has significantly lower no-load and load losses, complying with DOE energy efficiency standards. It maintains low energy consumption during long-term standby and full-load operation, effectively reducing daily grid operation loss and user electricity costs for long-term economic operation.

3.3 Outstanding Outdoor Weather Resistance

Designed specifically for outdoor pole-mounted installation, the fully sealed anti-corrosion oil tank can resist rain erosion, high-temperature aging, low-temperature frost and wind impact. It operates stably in extreme temperatures ranging from -30℃ to +45℃, with excellent waterproof, dustproof and anti-oxidation performance. The rugged mechanical structure adapts unattended outdoor working conditions, effectively reducing outdoor equipment failure rate in harsh climatic areas.

3.4 Easy Installation & Low Maintenance

The lightweight and compact integrated structure supports fast pole-mounted installation and flexible pad-mounted placement, requiring minimal on-site construction and short installation cycle. The fully enclosed oil immersed design eliminates frequent insulating oil replacement and routine maintenance work. Daily operation only needs simple visual inspection, realizing long-term maintenance-free operation and greatly reducing later operation and maintenance labor costs for power teams.

3.5 High Safety & Stable Power Supply

With 15kV high insulation grade and 95kV lightning impulse resistance, this 13.8kV pole mounted transformer effectively resists grid surge, lightning strike and short-circuit faults. The stable impedance design ensures balanced and accurate output voltage, avoiding voltage fluctuation that may burn out terminal electrical equipment. Strictly manufactured per ANSI and IEEE standards, it provides reliable overcurrent and fault tolerance performance for residential and commercial power distribution systems.

4. Core Purpose & Application Scenarios

4.1 Core Purpose

The core function of Single Phase Pole Mounted Transformer 75kva 13.8Kv to 120V/240V is to convert 13.8kV medium-voltage overhead grid power into standard 120V/240V single-phase low-voltage power. It undertakes decentralized power distribution, voltage stabilization and power safety isolation tasks in single-phase power grid systems, solving the problem of voltage mismatch between medium-voltage transmission lines and terminal civil and commercial equipment, and ensuring safe, stable and low-loss terminal power supply.

4.2 Typical Application Scenarios

Residential Single-family Power Supply: Widely used for independent villa power supply, suburban single-family households and scattered residential communities. The 75kVA rated capacity perfectly matches the daily comprehensive power load of single residential users, providing stable dual 120V/240V voltage for all household electrical appliances.

Rural Grid Electrification Projects: Ideal for rural power grid renovation, remote village electrification and mountainous area power supply expansion. This outdoor pole-mounted transformer solves the problems of unstable voltage and high power loss in remote rural decentralized power supply, improving rural power supply quality and grid coverage.

Small Commercial Site Power Distribution: Suitable for roadside retail stores, small shops, gas stations, field offices and mini service venues. It provides safe and standardized single-phase power support for small commercial equipment, meeting low-load and stable power consumption demands of decentralized commercial scenarios.

Remote Field Equipment Power Supply: Applied for communication base stations, outdoor monitoring equipment, scenic spot facilities and field engineering temporary power supply. The weather-resistant and unattended design adapts long-term outdoor operation, ensuring continuous and stable power supply for remote terminal equipment.

North American Standard Grid Matching: Specialized for 13.8kV single-phase power distribution networks in North America and other regions adopting 120/240V power supply standards, realizing precise voltage conversion and grid system matching for regional power infrastructure construction.

5. FAQ (Frequently Asked Questions)

5.1 Why choose an oil immersed pole-mounted transformer over a dry-type model for 13.8kV outdoor single-phase power distribution?

For outdoor pole-mounted installation scenarios, oil immersed single-phase transformers have irreplaceable practical advantages. The ONAN oil circulation cooling system delivers more uniform and efficient heat dissipation than dry-type cooling, supporting long-term full-load outdoor operation. The fully sealed oil tank structure has stronger anti-corrosion, waterproof and anti-aging capabilities, adapting to outdoor rain, high temperature and low temperature harsh environments. In addition, this 75kVA 13.8kV transformer features lower manufacturing cost and longer service life under the same capacity, with almost no daily maintenance required, making it the mainstream choice for outdoor rural and residential power grid construction.

5.2 What is the actual load capacity of a 75kVA single phase pole mounted transformer?

In actual on-site operation, the 75kVA oil immersed transformer can stably bear a continuous effective load of about 60kW, reserving 20% safe load margin to avoid overload operation. It can also withstand short-term intermittent overload within a reasonable range to cope with peak power consumption. This load range fully meets the daily peak and valley power consumption demands of single-family residences and small commercial sites. It is not recommended to operate under long-term full overload, which will accelerate equipment aging and affect service life.

5.3 What routine inspection work is needed for long-term outdoor operation of this 120/240V pole transformer?

This fully sealed oil immersed pole transformer has low daily maintenance pressure. Field operators only need to conduct regular visual inspections to check for tank oil leakage, shell rust and loose high-low voltage terminals, and ensure no debris blocks the heat dissipation area. It is recommended to test insulating oil performance and insulation resistance every 3 to 5 years, and conduct a comprehensive electrical performance overhaul every decade. Avoid long-term overload operation and direct lightning strike exposure without protection, which can effectively maintain stable operation and extend the 30-year design service life of the equipment.