Overview
The Single-Phase Oil-Immersed Transformer provides efficient and reliable power distribution suitable for various outdoor applications. It combines robust performance, energy efficiency, and extended service life by integrating meticulously engineered components and advanced manufacturing techniques.
Core Construction
Constructed from high-quality cold-rolled, grain-oriented silicon steel sheets, the transformer core ensures optimal efficiency. These sheets are precision-cut and laser scribed to achieve minimal burrs and superior accuracy. Moreover, a 45° inclined seam aligns the silicon steel with the magnetic flux, significantly reducing load losses, current, and noise.
High-Voltage Winding
For enhanced reliability, the high-voltage winding employs polyvinyl acetal enameled wire in a layered structure, insulated with double-sided adhesive dot paper. This insulation forms a cohesive unit after drying. Additionally, advanced winding technology reduces axial forces during short circuits, improving transformer durability.
Transformer Oil Containment Design
Utilizing a corrugated tank structure, the transformer enclosure is manufactured with precision through automated production lines. Each tank undergoes rigorous leak testing, ensuring superior sealing performance and protecting internal components effectively.
Enhanced Insulation
By filling the transformer with oil under vacuum conditions, insulation strength significantly increases, thus enhancing operational safety and reliability.
Advanced Bushing Design
The transformer bushings incorporate innovative technology without external pressure feet or plates, effectively preventing oil leaks and corrosion. This design enhances both structural integrity and visual appeal.
Magnetic Plate Oil Level Indicator
A specialized oil level indicator completely isolates the oil tank from air exposure, safeguarding transformer oil from ultraviolet damage and maintaining oil integrity.
Efficient Tap Changer
Featuring a strip-type no-load tap changer, the transformer enables effortless operation with automatic rapid switching and clear manual feedback. This solution resolves common switching challenges, and an additional locking feature prevents unauthorized adjustments, enhancing safety.
Application Advantages
- Efficient Power Distribution: Optimized specifically for dispersed power networks, the transformer shortens distribution line lengths, reducing losses and improving power quality.
- Energy-Efficient Core Design: Its innovative core reduces line losses by over 60%. Additionally, the pole-mounted design saves installation space.
- Sealed Structure: The fully sealed design provides excellent overload capacity, continuous reliability, and low maintenance, ensuring longevity.
Model Description
| Code | Meaning |
|---|---|
| D | Single-phase oil-immersed |
| 11 | Performance level code |
| □□□ | Rated capacity (kVA) |
| □ | Voltage level (kV) |
| □ | Special environment code: GY (High altitude), WF (Corrosion-resistant), TA (Dry tropics), TH (Humid tropics) |
Service Conditions
| Parameter | Specification |
| Device Type | Outdoor |
| Max Ambient Temperature | +40°C |
| 24-hour Avg Temperature | +35°C |
| Min Ambient Temperature | -25°C (Customizable to -45°C) |
| Earthquake Intensity | ≤8 |
| Altitude | ≤1000m |
| Installation Environment | Free from fire, explosions, chemical corrosion, or earthquakes |
Performance Parameters
| Rated Capacity (kVA) | High Voltage (kV) | Tap Range (%) | Low Voltage (kV) | Vector Group Symbol | No-load Loss (W) | Load Loss | No-load Current (%) | Short Circuit Impedance (%) |
| 5 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 40 | 215 | 3.2 | 3.5 |
| 10 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 45 | 235 | 2.8 | 4.0 |
| 15 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 53 | 315 | 2.8 | 4.0 |
| 20 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 62 | 405 | 2.8 | 4.0 |
| 25 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 70 | 480 | 2.8 | 4.0 |
| 30 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 80 | 560 | 2.8 | 4.0 |
| 50 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 120 | 855 | 2.3 | 4.0 |
| 63 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 135 | 1020 | 2.1 | 4.0 |
| 80 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 160 | 1260 | 2.0 | 4.0 |
| 100 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 190 | 1485 | 1.9 | 4.0 |
| 125 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 220 | 1755 | 1.8 | 4.0 |
| 160 | 6,6.3,10,10.5,11 | ±2×2.5%, ±5% | 0.22, 0.23, 0.24 | Ii0, Ii6 | 260 | 2050 | 1.6 | 4.0 |
The Single-Phase Oil-Immersed Transformer is ideal for efficient, reliable power distribution, providing superior performance and minimal maintenance.