A Vacuum Circuit Breaker (VCB) is a type of circuit breaker where the arc quenching occurs in a vacuum chamber. These breakers are highly reliable, maintenance-free, and ideal for medium-voltage power systems.
| Feature | Details |
|---|---|
| Voltage Rating | Typically ranges from 3.3 kV to 36 kV for medium-voltage applications |
| Current Rating | Up to 4000A for heavy-load systems |
| Breaking Capacity | Up to 63 kA for effective arc extinction |
| Insulation Medium | Vacuum for fast arc quenching and dielectric insulation |
| Arc Quenching Time | 1-2 cycles for rapid response |
| Mechanical Life | Up to 1,00,000 operations for prolonged durability |
| Contact Erosion | Minimal due to vacuum arc extinction technology |
| Design Type | Available in indoor and outdoor configurations |
| Compliance Standards | Conforms to IEC 62271-100, ANSI, and IS standards |
| Rated Voltage | Upto 36kV |
| Rated Current | Upto 2500A |
| Frequency | 50/60 Hz |
| short-circuit breaking current | Upto 31.5kA |
| Lightning impulse withstand level-LIWL | upto 170kVp |
| short-circuit making current | Upto 65kA |
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