Description
Comparative Technical Matrix
| Performance Characteristic / Parameter | Medium Voltage SF6 Gas Circuit Breaker Technical Specifications |
| Maximum System Voltage (Ur) | 12 kV – 17.5 kV – 24 kV – 36 kV – 40.5 kV |
| Power Frequency Withstand Voltage (1 min dry) |
• 12 kV: 28 kV | 17.5 kV: 38 kV | 24 kV: 50 kV • 36 kV: 70 kV | 40.5 kV: 95 kV |
| Lightning Impulse Withstand Level (Up Peak) |
• 12 kV: 75 kVp | 17.5 kV: 95 kVp | 24 kV: 125 kVp • 36 kV: 170 kVp | 40.5 kV: 185 kVp |
| Continuous Current Rating (Ir) |
• 12 kV / 24 kV: Up to 3600 A (fixed) / 3150 A (withdrawable) • 17.5 kV / 36 kV / 40.5 kV: Up to 2500 A – 3150 A |
| Short-Circuit Breaking Capacity (Isc / 3 sn) |
• 12 kV / 17.5 kV: Up to 50 kA • 24 kV: Up to 40 kA • 36 kV / 40.5 kV: Up to 31.5 kA |
| Peak Making Current Capacity (Ip) | 40 kAp – 125 kAp across the product range |
| Standard Operating Sequence | O – 0.3s – CO – 15s – CO (standard) / O – 0.3s – CO – 3min – CO (heavy duty) |
| Switching Speed Characteristics |
• Opening Time: 35 ms – 60 ms (12–24 kV) / 45 ms (36–40.5 kV) • Arcing Time: 10 ms – 15 ms • Total Break Time: 45 ms – 75 ms • Closing Time: ≤ 85 ms |
| Insulating Gas Filling Pressure | Absolute pressure between 380 kPa and 550 kPa depending on breaking capacity |
| Phase Pitch Options | 150 mm, 210 mm, 275 mm or 350 mm center-to-center distance |
| Thermal Operating Range | -5°C to +40°C |
