1.ZW8-12 Series high voltage vacuum circuit breaker
2.Rated voltage 12KV
3.competitive price
4.ISO9000 Certificate
1.specifications
NO. | Item | Unit | Parameter | ||||
|
|
| 6.3KA | 12.5KA | 20KA | ||
1 | Rated voltage | KV | 12 | ||||
2 | Max. working voltage | KV | 12 | ||||
3 | Rated current | A | 630 | ||||
4 | Rated short-circuit break and close current | KA | 6.3 | 12.5 | 20 | ||
5 | Rated short-circuit close current (peak value) | KA | 16 | 31.5 | 50 | ||
6 | Rated peak value withstand current | KA | 16 | 31.5 | 50 | ||
7 | Rated short-time 1min withstand current | KA | 6.3 | 12.5 | 20 | ||
8 | Rated insulation level | Industrial frequency withstand voltage(dry) | KV | 42 | |||
|
| Thunder impulse withstand voltage (peak value) |
| 75 | |||
9 | Rated operating sequence |
| Off-0.3s-on and off – 180s- on and off | ||||
10 | Machine’s life-span | times | 10000 | ||||
11 | Rated short-circuit current break and close time | times | 30 | ||||
12 | Rated switching voltage of operating mechanism | V | 110,220 | ||||
13 | Rated breaking voltage of operating mechanism | V | 110,220 | ||||
14 | Switching distance of the contact | mm | 11±1 | ||||
15 | Compressed length of contact’s spring | mm | 3 | ||||
16 | Three-phase divide-shut time difference | ms | ≤2 | ||||
17 | Contact bounce time when it switches on | ms | ≤2 | ||||
18 | Average speed of breaking brake | m/s | 1.0±0.2 | ||||
19 | Average speed of closing brake | m/s | 0.7±0.15 | ||||
20 | Time of breaking brake | Under the highest operational voltage | s | 0.015-0.05 | |||
|
| Under the lowest operational voltage |
| 0.03-0.06 | |||
21 | Time of closing brake | s | 0.025-0.05 | ||||
22 | Each main line loop resistance | μΩ | ≤120 (≤200) | ||||
23 | Permit abrasion total thickness of active and static contactor | mm | 3 | ||||
2.Introduction
ZW8-12,ZW8-12G series high voltage vacuum circuit breaker is a kind of outdoor high-voltage switch equipment with 50Hz three phase alternating current and 12Kv rated voltage. It mainly apply to break and close the load current, overload current and short-circuit current in country power net, city power net and small power system. The general framework of this product is adopted three-phase together box type,putting the three-phase arc extinguishing chamber inside of the metal box. For the SMG material has the advantage of space insulation and grounding insulation, the breaker has
dependable performance and high insulating strength.
ZW8-12G is composed of ZW8-12 breaker and disconnecting link that we called
combination breaker. It can be used as sectional switch.
These series products have the operation framework of CT23 type power storage with
spring, which can divide into electromotor type and manual type.
