50kva Pole Mounted Transformer 12.47kv To 277v Oil Filled
Distribution Electric Pole Transformer UL Listed
The pole-mounted transformer is a fully sealed cylindrical
structure and is installed by pole-mounted suspension. It has the
advantages of small size, strong overload capacity, high
reliability in continuous operation, simple maintenance, long
service life
The pole-mounted transformers produced by WINLEY have obtained
UL/cUL certification, with rated capacities ranging from 10 kVA to
333 kVA. The products meet or even exceed ANSI, IEEE, CSA, IEC60076
and other standards.
Main Data
| Transformer Type | Overhead Distribution Transformer, Conventional Type |
| Phase | Single Phase |
| Capacity | 50 KVA |
| Primary Voltage | 12470GrdY/7200 |
| Primary BIL | 95 kV |
| Secondary Voltage | 277/480V |
| Secondary Voltage Class | 1.2 kV Class |
| Secondary Phasor | Dual Winding Single Phase |
| Secondary BIL | 30 KV |
| Frequency | 60 Hz |
| Temperature Rise | 65°C |
| Insulation Rating | Class E |
| Cooling Class | ONAN; Self-Cooled |
| Efficiency Standard(s) | Meets DOE 2016 Standards, Meets ANSI/IEEE Standards |
| Winding Material | Copper |
| Ambient Temperature Rating | 40°C |
| Sound Level | 51 dBA |
| Efficiency | 99.00% |
| No Load Loss (in watts) | +/- 176W |
| Full Load Loss (in watts) | +/- 650W |
Drawing
Feature
- High pressure porcelain bushing
- Low pressure porcelain bushing
- Eyebolt Terminals - HV and LV
- LV neutral point earthing bus
- Compliant with ANSl support lugs
- Mild steel tank
- Non-PCB mineral oil/FR3rm fluid
- 0ff-load tap changer
- Oil-filling plug with cap and earth
- Pressure relief device
- Coil: copper/Aluminum winding
- lron core: silicon steel
- Lifting ears
- Nameplate engraving
Pole Mounted Transformer Key Craft
1. Magnetic circuit design
The iron core's shape, size, hysteresis, and eddy current loss are
important factors to consider. Properly designing the magnetic
circuit can lead to efficient energy transmission and reduced loss.
2. Winding design
Factors such as the number of turns, wire material, interlayer
insulation, and wiring method should be taken into consideration
during the design process. By implementing a well-planned winding
design, the transformer can achieve greater load capacity and
reliability.
3. Insulation material selection
Choosing the right insulation materials is paramount to ensure
safety and longevity. It's essential to opt for insulating
materials that offer excellent insulation performance,
high-temperature resistance, arc breakdown resistance, and moisture
resistance.
4. Vacuum oil filling
Single-phase pole-mounted transformers typically utilize a vacuum
oil filling method. This involves treating the transformer chips
with a vacuum, injecting insulating oil, eliminating air bubbles,
and sealing the transformers. The vacuum oiling process is
beneficial as it enhances the insulation performance and thermal
stability of the transformer, leading to prolonged service life.
5. Heat treatment
Transformers' mechanical properties and strength can be enhanced
through heat treatment. This process alters the material's
organizational structure, boosting its hardness and wear resistance
while reducing stress and deformation.
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
