Product Details
250kva Single Phase Pole Mounted Transformer 304 SS Tank 22860Grdy
To 480V oil immersed Power Distribution Transformer UL/cUL Listed
WINLEY Electric designs and manufactures a full line of
single‑phase pole‑type distribution transformers for overhead
utility systems. Built for dependable power and long service life,
this 250 kVA pole‑mounted transformer pairs high capacity with
industry‑leading safety, efficiency, and corrosion resistance — now
reinforced by authoritative UL certification for assured compliance
and field confidence.
Pole Mounted Transformer Main data
| Transformer Type | Pole Mounted Transformer |
| Phase | Single Phase |
| Capacity | 250 KVA |
| Primary Voltage | 22860GrdY/13200 |
| Secondary Voltage | 277/480V |
| Frequency | 60 Hz |
| Temperature Rise | 65°C |
| Insulation Rating | Class E Insulation - 120°C, 248°F |
| Cooling Class | ONAN; Self-Cooled |
| Efficiency Standard(s) | Meets DOE 2016 Standards, Meets CSA Standards Meets ANSI/IEEE
Standards |
| Winding Material | Copper |
| Ambient Temperature Rating | 40°C |
| Ambient Operating Temperature Range | -40°C to +40°C (-50°F to +104°F) |
| Sound Level | 55 dBA |
| Tank Material | 304 Stainless Steel |
| Efficiency | 99.20% |
| No Load Loss (in watts) | +/- 680W |
| Full Load Loss (in watts) | +/- 2,755W |
Technical drawings
Key Advantages
- Powerful 250 kVA capacity: Ideal for heavy single-phase
distribution loads and industrial or utility pole-mounted
applications that require substantial power handling.
- UL-qualified: Meets rigorous Underwriters Laboratories (UL)
standards, providing verified safety and market acceptance.
- High efficiency: 99.20% efficiency (measured at 50% of nameplate
kVA), complying with DOE 2016 and CSA efficiency requirements to
reduce operating losses and energy costs.
- Rugged stainless steel construction: 100% 304 stainless steel tank,
removable top cover and corrosion-resistant cover band for
outstanding durability in harsh outdoor environments.
Pole Mounted Transformer Certifications
Pole Mounted Transformer Specifications
| 10kva-333kva Single-phase oil immersed transformer |
| Rated Cap acity(kVA) | High | Low Voltage(v) | Connection Symbol | Standard | Short-circuit impedance(%) | Efficiency |
| Voltage(v) | (%) |
| 10 | 4160 7200 12000 12470 13200 13800 19920 24940 34500 | 110 220 230 400 480 | II0,II6 | IEEE/ANSI/ DOE | 1.8-4% | 98.7 |
| 15 | 98.82 |
| 25 | 98.95 |
| 37.5 | 99.05 |
| 50 | 99.11 |
| 75 | 99.19 |
| 100 | 99.25 |
| 167 | 99.33 |
| 250 | 99.39 |
| 333 | 99.43 |
Production process
Company Profile
WINLEY is located in Xiamen, China. We are specialized in
manufacturing all kinds of transformers, voltage stabilizers,
voltage regulators, etc. The products are widely used in industrial
machinery, new energy, power generation, power supply, coal,
metallurgy, petroleum, chemical, construction, port, airport,
railway transportation, urban infrastructure, and other areas.
With more than 17 years experience, WINLEY always adhere to the
route of "Integrity makes brand,quality wins the market"! We have a
professional R&D team, a quality control team, scientific
production management system and comprehensive customer service
system.
WINLEY holds ISO 9001:2015 quality management system certification,
All products have approved by CE certification, we can also apply
for UL(Authorized by partner), SASO, SONCAP, etc. according to
customer requirements.
WINLEY products are sold to Europe, North & South America, Oceania,
Asia and Africa, more than 100 countries and regions in the world
are using WINLEY products. Products’ quality and technical service
are recognized by all customers around the world, and we have
cooperative distributors in some countries.
And we will continue to carry forward the integrity of compliance,
scientific and technological innovation, win-win cooperation
spirit, provide quality products and comprehensive service to all
partners, and work hard for the development of the world’s green
electrical power.
