VS1-12(ZN63A-12) 12kV Indoor Vacuum Circuit Breaker (VCB) is a mainstream medium voltage indoor switchgear for 12kV power distribution system.
It uses high-performance vacuum interrupter as arc quenching medium, features small size, light weight, zero pollution, low noise and maintenance-free operation.
Available in fixed type and withdrawable trolley type, perfectly matched with KYN28 indoor switch cabinet. It is the ideal choice for commercial buildings, industrial plants, power plants, substations and new energy power distribution projects.
1.Temperatura ambiente: no superior a +40 °C, no inferior a -15°C
2. Altitud: no superior a 1000 m.
3. Humedad relativa: media diaria no superior a 95%, media mensual no superior a 90%.
4. Intensidad del terremoto: no más de diez.
5. Sin riesgo de incendio, explosión, suciedad grave, corrosión química, así como lugares de vibraciones intensas.
Vacuum interrupter arc extinction, safe, environmental friendly and no pollution
Compact integrated structure, small installation space
Maintenance-free during normal service life, low operation cost
High short-circuit breaking capacity, stable and reliable performance
Optional fixed type / withdrawable trolley type for cabinet installation
Spring operating mechanism, flexible manual and electric operation
Strong mechanical life, suitable for frequent switching operation
Good seismic and anti-corrosion performance, long service lifespan
Model: VS1-12 / ZN63A-12
Rated Voltage: 12kV
Rated Frequency: 50Hz
Rated Current: 630A, 1250A, 1600A, 2000A, 2500A, 3150A
Rated Short-circuit Breaking Current: 20kA, 25kA, 31.5kA, 40kA
Rated Short-time Withstand Current: 20kA~40kA / 4s
Installation Type: Indoor Fixed / Withdrawable Trolley Type
Arc Quenching Medium: Vacuum
Operating Mechanism: Spring Type
Ambient Temperature: -20℃ ~ +40℃
Applicable Altitude: ≤1000m
| NO | Artículo | Unidades | parámetros |
| 1 | Tensión nominal | KV | 12 |
| 2 | Frecuencia nominal | HZ | 50 |
| 3 | Corriente nominal | A | 630.1250.1600.2000.3150 |
| 4 | Corriente asignada de corte en cortocircuito | KA | 20 25 31.5 |
| 5 | Corriente nominal de cierre en cortocircuito (pico) | KA | 50 63 80 |
| 6 | Duración asignada del cortocircuito | S | 4 |
| 7 | Corriente asignada de corte en cortocircuito Número de corte | nos | 50s |
| 8 | Secuencia de funcionamiento nominal | 0-0,3s-CO-180s-CO | |
| 9 | Tensión nominal soportada por impulso de rayo | kv | 125 |
| 10 | 1min frecuencia de alimentación tensión soportada | KV | 65 |
| 11 | Hora de cierre | ms | ≤ 70 |
| 12 | hora de apertura | ms | ≤ 50 |
| 13 | Vida mecánica | Times | 20000 |
| 14 | Tensión nominal de almacenamiento y funcionamiento | V | CA CC 220/110 |
| 15 | Romper la vida | ms | ≤ 80 |
| 16 | Vida útil | s | ≤ 10 |







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