37.5 kVA Pole Mounted Transformer | IEEE & DOE Compliant
OMEK 37.5 kVA single phase pole mounted transformers with IEEE/ANSI/DOE standards, lower medium voltage from 2.4kV – 34.5kV down to 120/240V. They are designed with a weather-tight tank, and 100% PCB free mineral or biodegradable insulation fluid, ensuring dependable power for residential, rural & agricultural and light commercial applications.
- Rated Capacity: 37.5 kVA
- Primary Voltage: Up to 34.5 kV
- Secondary Voltage: 120/240V
- Cooling Type: ONAN
- Standards: IEEE C57.12.20, IEEE C57.12.31, DOE 2016
Key Features
Before oil filling, OMEK conducts laser based airtightness testing on each 37.5 kVA overhead transformer tank, ensuring long-term reliability in the coastal environment, high-humidity and utility applications.
OMEK uses multi-layer epoxy/polyurethane coating for mild steel or 304/316 stainless steel, resisting corrosion in coastal, high-salt-spray, and industrial corrosive areas.
5-position NLTC tap changer (±2 × 2.5%) allows precise voltage adjustment at line ends, maintaining the voltage level and prevents damage to the equipment due to voltage fluctuations.
Optional CSP design features internal high-voltage fuses, secondary breakers, and surge arresters, saving up to 15% in installation time and overall cost, without the need for external fuse cutouts and arresters.
Technical Specs: OMEK 37.5 kVA Single Phase Overhead Transformer D13‑M vs. D11‑M Performance Comparison
| Technical Specs | D13‑M Series (Ultra‑Low Loss Core) | D11‑M Series (Standard Efficiency) |
|---|---|---|
| Phase | Single phase | Single phase |
| High Voltage (kV) | 6 / 6.3 / 10 / 10.5 / 11 | 6 / 6.3 / 10 / 10.5 / 11 |
| Low Voltage (kV) | 2 × (0.22~0.24) or 0.22~0.24 | 2 × (0.22~0.24) or 0.22~0.24 |
| Frequency (Hz) | 50, 60 | 50, 60 |
| Tapping Range | ± 2×2.5% | ± 2×2.5% |
| Total Weight (kg) | 340-454 | 340-454 |
| Connected Group Label | Ii0, Ii6 | Ii0, Ii6 |
| No‑Load Loss (W) | 80 | 100 |
| Load Loss (W) | 700 | 700 |
| No‑Load Current (%) | 0.8 | 0.8 |
| Short Circuit Impedance (%) | 3.5 | 3.5 |
| Cooling Type | ONAN | ONAN |
| Temperature Rise | 65 ℃ | 65 ℃ |
| Enclosure Protection Rating | IP54, IP65 | IP54, IP65 |
| Overall Dimension (L×W×H, inches) | 22.1 × 19.7 × 42.3 | 22.1 × 19.7 × 42.3 |
| Mounting Dimension (L×W, inches) | 9.8 × 17.7 | 9.8 × 17.7 |
OMEK Solution: We can customize kVA ratings, high/low primary voltages, tapping range, vector groups, rated frequency, dual-voltage outputs, short-circuit impedance, enclosure material, winding material, core material, packing method, etc., according to your specific requirements.
Application & Case Study
Medium-Density Suburban & Multi-Family Residential Clusters
Application Scene: Overhead secondary step-down distribution in rural cooperatives and expanding residential cluster or mixed-load residential lanes in Latin America.
OMEK Solution: A regional electric cooperative in Honduras bought 12 units of OMEK 37.5 kVA pole mounted transformers on a 13.8 kV distribution line, which delivered 120/240V split phase power. It supplied 10-12 standard households (2-3 kW peak) or 4-6 larger households (5-7 kW peak) of air conditioning and electric water heaters.
Low loss core and high thermal margin windings ensured that the voltage remains stable during peak hours in the evening, minimize idle losses when power flows on the line, and have never failed after 5 years of operation.
Grid Distribution
Application Scene: Ideal for secondary distribution over buildings in high humidity coastal townships, island utility systems and high-density residential areas with significant marine corrosion problems.
OMEK Solution: The deployment of 45 units of OMEK 37.5 kVA pole mounted transformer (13.8 kV to 120/240 V) in a Regional Electric Cooperative in Luzon replaced the traditional steel pole mounted units which could corrode after only 3–5 years. The OMEK transformers had 304 stainless steel tanks, C5-M marine grade coating and FR3 eco fluid to provide 8-12 households with heavy air-conditioner loads.
The units were tested for 24 months and were proven to have no corrosion failures in salt mist and monsoon conditions, with a 40% drop in replacement cost.
Roadside Commercial Hubs & Electric Vehicle Infrastructure
Application Scene: Level 2 EV charging for decentralized roadside charging stations, Level 2 highway service plazas, fast food drive thrus and car wash applications.
OMEK Solution: A national highway service group installed OMEK 37.5 kVA pole mounted transformers to power remote gas stations and fast-food restaurants. Electrical noise, known as harmonics, was generated by commercial refrigerators and computer systems, and caused problems in the power system for normal operation of the standard transformer. OMEK added harmonic protection to ensure the power system was operating properly.
The customer avoided the installation of large ground pads and thus reduced construction costs and ground space by 40% by mounting the transformers directly on the utility poles.
Rooftop Solar & Village Energy Storage
Application Scene: Home solar panels and home batteries and connecting to the power grid so they can transfer power back and forth.
OMEK Solution: A 35 kW community solar-and-battery project in the Valparaíso Region used OMEK 37.5 kVA overhead transformers to provide connection between local clean energy and the main 13.2 kV grid. Solar panels give out an abundant amount of electricity to the power lines on sunny days.
OMEK designed these transformers to be strong enough to take this flow of power in reverse without damage, with heavy duty copper coils and heat resistant insulation.
Get Your Customized 37.5 kVA Pole Mounted Transformer?
Just tell us your specs: phase number, winding material, high/low voltage, frequency, no-load Loss and load loss. Missing some numbers? No problem. Tell us your application and grid standard — our engineers will help you determine the rest. Contact OMEK now!
Why Choose OMEK – Your Trusted 37.5 kVA Pole Mounted Transformer Manufacturer
Stable Raw Material Supply
In-House Copper Industrial Hub: OMEK has a dedicated copper industrial park, ensuring that 100% purity grade of copper coil and a stable raw material supply chain.
Stable Supply & Price: Direct access to raw materials helps avoid sudden price increases and supply delays, reducing more than 15% of the total cost of ownership.
Full-Process Manufacturing & 100% Tested
In-House Production: All the processes in accordance with ISO 9001 standards are handled in-house, including core cutting, coil winding and oil filling in the vacuum room.
100% Factory Tested: All units undergo routine tests required by this quality check and have certified test reports attached to each shipment.
Global Certification & Compliance
International Standards: Fully complies with energy efficiency and energy saving requirements of DOE and PCCC and constructed to IEEE/ANSI, IEC, CE standards.
Easy Regional Utility Approval: Pre-qualified for fast market entry in North America, South America (RETIE, INMETRO), Africa (SONCAP, KEBS, SABS), and Southeast Asia.
Flexible Customization & OEM Support
Tailored Solutions: OMEK changes technical specifications, including protection breakers, anti-rust coatings to fit your requirements.
Full OEM Support: OMEK provides full OEM manufacturing services such as custom metal nameplates, your own brand logos, custom tank colors, and private label packaging.
Related Products
FAQs
Have any questions? We’re here to help you out.
- Capacity Alternatives: Do you need a smaller or larger single-phase unit?
Lower Load: 25 kVA Pole Mounted Transformer, 15 kVA Pole Mounted Transformer, 10 kVA Pole Mounted Transformer
Higher load: 50 kVA Pole Mounted Transformer, 100 kVA Pole Mounted Transformer, 150 kVA Pole Mounted Transformer - Overhead Pole Mounted Lines: Not possible?
For landscape purposes, safety codes or local regulations, consider using a pad mounted transformer if overhead lines are not possible. - Phase & Configuration Alternatives: searching for a 37.5 kVA 3 phase transformer?
Normally, a single phase uses a 37.5 kVA. It is not linked to a 3 phase load, which is against the NEC and will create an unbalance in voltage. But there’s a better way: 3 Phase Transformer Bank: 3 × 37.5 kVA = 112.5 kVA.
A 37.5 kVA pole mounted transformer typically weighs 340-454 kg.
Yes. The sound from a 37.5 kVA overhead transformer is perfectly normal and is a quiet, steady, low frequency hum of about 100-120Hz. It is due to the small change in the size of the transformer core when it is subjected to alternating magnetic fields, which is known as magnetostriction. The unit functions well if the hum is low-level and remains the same.
For the secondary output of 240 V, the full-load amperage is 156.25 A (or 312.5 A split across each 120V leg). The 80% rule is generally used by utilities for continuous loads, which means that the continuous draw is at around 125 A at 240V. This rating amperage is exceeded, which leads to overheating the internal windings and reduces the life of insulation.
OMEK 37.5 kVA pole mounted transformer has a lead time of only 4-8 weeks, which is much quicker than the industry average time of 20+ weeks. For projects that need to be done quickly, there is also express production scheduling that can be used.