An SF₆ Circuit Breaker is a high-voltage circuit breaker that uses sulfur hexafluoride (SF₆) gas as the insulating and arc-extinguishing medium. Known for its superior dielectric strength and thermal stability, SF₆ breakers are widely used in power transmission and distribution systems.
| Feature | Details |
|---|---|
| Voltage Rating | Ranges from 11 kV to 800 kV for transmission networks |
| Current Rating | Up to 5000A for heavy-duty applications |
| Breaking Capacity | Up to 63 kA for fast and effective arc quenching |
| Insulation Medium | SF₆ gas for superior dielectric performance |
| Operating Mechanism | Spring, hydraulic, or pneumatic systems for precise operation |
| Arc Quenching Time | 2-3 cycles for fast interruption |
| Leakage Rate | ≤ 0.5% per year (ensuring minimal SF₆ gas loss) |
| Design Types | Live Tank, Dead Tank, and GIS configurations |
| Compliance Standards | Meets IEC 62271-100, ANSI, and IS standards |
| Rated Voltage | Upto 72.5kV |
| Rated Current | Upto 3150A |
| Frequency | 50/60 Hz |
| short-circuit breaking current | Upto 40kA |
| Lightning impulse withstand level-LIWL | upto 325kVp |
| Peak Withstand Current | Upto 100 kAp |
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