| Params | 1. **Model & Rated Capacity**
This S-series 35 kV oil-immersed transformer covers 18 standard capacity ratings from 800 kVA up to 40,000 kVA, including 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300, 8000, 10000, 12500, 16000, 20000, 25000, 31500 and 40000 kVA.
2. **Voltage Configuration & Connection**
- High voltage side: 35 kV base voltage with flexible tapping ranges: 35±5% for 800–2500 kVA units, 35±5% / 38±5% for 3150–5000 kVA units, and 35±2×2.5% / 38±2×2.5% for 6300–40000 kVA units.
- Low voltage side: Multiple output options available, including 10.5 kV, 6.3 kV, 3.15 kV for lower capacity models, and 11 kV, 10.5 kV, 6.6 kV, 6.3 kV, 3.3 kV, 3.15 kV for higher capacity models.
- Connection group: Standard Yd11 vector group for all models.
3. **Loss Performance**
- No-load loss: Ranges from 1.23 kW (800 kVA) to 28.8 kW (40,000 kVA), scaling proportionally with rated capacity.
- Load loss: Ranges from 9.9 kW (800 kVA) to 155.25 kW (40,000 kVA).
4. **Electrical Characteristics**
- No-load current: Gradually decreases from 0.9% at 800 kVA to 0.36% at 25,000–31,500 kVA, with a slight increase to 0.48% at the 40,000 kVA rating.
- Impedance voltage: Stepwise design matching capacity grades: 6.5% for 800–2500 kVA, 7.0% for 3150–5000 kVA, 7.5% for 6300–10,000 kVA, and 8.0% for 12,500–40,000 kVA.
5. **Weight Specifications (tonnes)**
- Oil weight: 0.88 t to 7.78 t
- Total weight: 3.83 t to 46.9 t
- Top-up oil weight: 0.25 t to 2.48 t
- Transport weight: 3.56 t to 38.5 t | Material | Core
High-quality grain-oriented electrical steel for optimized magnetic performance and reduced core losses.
Windings
High-purity copper or aluminum conductors, designed according to rated capacity and project requirements.
Insulation System
Transformer-grade insulating paper, pressboard and high-performance transformer oil.
Tank & Structural Components
High-strength low-carbon steel with corrosion-resistant surface treatment for reliable outdoor operation.
Bushings & Terminals
High-quality conductive materials with porcelain or composite insulation, selected according to voltage and insulation requirements.
Cooling System
Steel radiators and optimized oil circulation components for efficient heat dissipation.
Protection & Monitoring Components
Buchholz relay, pressure relief device, oil level indicator, temperature indicators and other protection or monitoring devices can be configured according to requirements. |
