Rockwill pad-mounted transformer is a fully enclosed, ground-level solution designed for stepping down high-voltage electricity to usable levels in residential, commercial, and industrial applications. Unlike pole-mounted units, our transformers are housed in tamper-proof, weather-resistant metal enclosures mounted on concrete pads, ensuring safety, durability, and space efficiency.
Main Characteristics
- Full Insulation and Sealed Structure：Ensures complete safety for personnel and equipment.
- Insulated HV Cable Connectors：Safe, reliable, and easy to operate.
- Compatible with Ring Main and Terminal Systems：Enables flexible power supply configurations for improved reliability.
- Advanced Core Design：Three-phase three-limb or five-limb construction with step-lap technology for reduced noise, lower losses, and superior short-circuit resistance.
- Vacuum Drying and Oil-Filling Technology：Ensures high-quality insulation and extends transformer lifespan.
- Anti-Corrosion Enclosure：Specialized coating with anti-condensation, anti-salt fog, and anti-mildew properties, ideal for harsh environments.
Main Parameter
| Rated Power (kVA) |
High Voltage (kV) |
Low Voltage (V) |
Loss (W) |
| No-load Loss (W) |
On-load Loss (W) |
| 75 |
6kV/6.3kV/10.5kV/11kV/33kVor others |
400V |
180 |
1250 |
| 112.5 |
200 |
1500 |
| 150 |
280 |
2200 |
| 225 |
400 |
3050 |
| 300 |
480 |
3650 |
| 500 |
680 |
5100 |
| 750 |
980 |
7500 |
| 1000 |
1150 |
10300 |
| 1500 |
1640 |
14500 |
| 2000 |
2160 |
20645 |
| 2500 |
2680 |
23786 |
| 3000 |
3300 |
25300 |
| 3750 |
4125 |
27875 |
| 5000 |
5200 |
30000 |
Service Environment
| Parameter |
Specification |
| Ambient temperature |
–25 °C to +40 °C |
| Altitude |
≤ 1,000 m above sea level |
| Installation |
Outdoor, ground-level on concrete pad |
| Enclosure protection |
Tamper-resistant, weatherproof, suitable for public areas |
Applications
- Urban power networks — residential complexes and high-rise buildings
- Commercial and industrial facilities
- Step-down distribution in 33 kV primary systems
- Ground-level installations requiring secure, low-profile enclosures
Structure View
HV:1.Manometer; 2.Oil level guage; 3.Air valve; 4.Oilling plug; 5.Plug-in fuse; 6.Thermometer; 7.Load switch operation indicator plate 8.Load switch; 9.HV cable contactor; 10.Hanging; 11.Tap changer; 12.Earthing & earthing label; 13.Dual-purpose valve; 14.HV cable bracket.
LV: 15.Measuring equipment; 16.LV branch; 17.Measurement lead sealing; 18.Transformer oil tank.
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