250kva Single Phase Pole Mounted Transformer 304 SS Tank 22860Grdy To 480V oil immersed Power Distribution Transformer
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
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