Information
The Dingxin 20 kV SC(B)10 dry-type transformer is designed to convert 20, 22, or 24 kV medium-voltage power directly to 0.4 kV for safe and efficient power distribution.
Manufactured with high-quality silicon steel and optimized cast-resin windings, the transformer delivers low electrical loss, reduced operating noise, and strong resistance to atmospheric and switching overvoltage. An optional temperature-monitoring and forced-air cooling system automatically activates the fans under heavy-load conditions, improving overload capability and operational reliability.
The oil-free and flame-retardant construction makes this 20 kV dry-type distribution transformer suitable for indoor substations, commercial buildings, industrial facilities, and other locations with strict fire-safety requirements.
Main Technical Parameters
| Parameter |
Specification |
| Product series |
SC(B)10 |
| Rated capacity |
50–2,500 kVA |
| High voltage |
20 / 22 / 24 kV |
| High-voltage tapping range |
±5% or ±2 × 2.5% |
| Low voltage |
0.4 kV |
| Connection symbol |
Yyn0 or Dyn11 |
| No-load current |
0.8%–2.4% |
| No-load loss |
380–4,300 W |
| Short-circuit impedance |
6.0% or 8.0% |
| Voltage regulation |
Off-circuit tap changing |
| Cooling |
Natural air or optional forced-air cooling |
| Installation |
Indoor |
20 kV Performance Data
| Capacity (kVA) |
No-Load Current (%) |
No-Load Loss (W) |
Short-Circuit Impedance (%) |
| 50 |
2.4 |
380 |
6.0 |
| 100 |
2.2 |
600 |
6.0 |
| 160 |
1.8 |
750 |
6.0 |
| 200 |
1.8 |
820 |
6.0 |
| 250 |
1.6 |
940 |
6.0 |
| 315 |
1.6 |
1,080 |
6.0 |
| 400 |
1.4 |
1,280 |
6.0 |
| 500 |
1.4 |
1,500 |
6.0 |
| 630 |
1.2 |
1,700 |
6.0 |
| 800 |
1.2 |
1,950 |
6.0 |
| 1,000 |
1.0 |
2,300 |
6.0 |
| 1,250 |
1.0 |
2,650 |
6.0 |
| 1,600 |
1.0 |
3,100 |
6.0 |
| 2,000 |
0.8 |
3,600 |
6.0 or 8.0 |
| 2,500 |
0.8 |
4,300 |
6.0 or 8.0 |
EN
