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

Brand Name:WINLEY
Certification:UL/cUL,CE,ISO
Model Number:D-250/22.86
Minimum Order Quantity:1unit
Delivery Time:30days
Payment Terms:T/T
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Location: Xiamen Fujian China
Address: No.168,Xiabao Road,Siming,Xiamen,Fujian,China
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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 TypePole Mounted Transformer
PhaseSingle Phase
Capacity250 KVA
Primary Voltage22860GrdY/13200
Secondary Voltage277/480V
Frequency60 Hz
Temperature Rise65°C
Insulation RatingClass E Insulation - 120°C, 248°F
Cooling ClassONAN; Self-Cooled
Efficiency Standard(s)Meets DOE 2016 Standards, Meets CSA Standards Meets ANSI/IEEE Standards
Winding MaterialCopper
Ambient Temperature Rating40°C
Ambient Operating Temperature Range-40°C to +40°C (-50°F to +104°F)
Sound Level55 dBA
Tank Material304 Stainless Steel
Efficiency99.20%
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)HighLow Voltage(v)Connection SymbolStandardShort-circuit impedance(%)Efficiency
Voltage(v)(%)
104160
7200
12000
12470
13200
13800
19920
24940
34500
110
220
230
400
480
II0,II6IEEE/ANSI/ DOE1.8-4%98.7
1598.82
2598.95
37.599.05
5099.11
7599.19
10099.25
16799.33
25099.39
33399.43

Production process



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

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

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