Introduction :Â
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VS1 -12KV fixed type indoor vacuum circuit breaker is rated voltage 12kV, three-phase AC 50Hz/60Hz Indoor high-voltage Switchgear ,applied for power stations, substations, and industrial and mining enterprises to control or  protection transmission and distribution systems , specially for the important high altitude breaking load and frequent operation place.
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Circuit breaker manufacturing accordance with our national standard GB1984-2003
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Circuit breaker operating mechanism for the spring energy storage type, can use AC and DC energy storage operations, can also be used manually.
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Circuit breaker can also be equipped with long life permanent magnetic actuator, mechanical life can reached 60000 times , can be used for extremely Frequent operation place,
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Circuit breaker designed to repackage the structure before and after, both can be used as a fixed installation unit, Can also be equipped with the chassis as used in the mounted unit.
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The use of environmental conditions:
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1.Ambient temperature: not higher than +40 °C, not less than -15°C  Â
2. Altitude: not exceed 1000m.Â
3. Relative humidity: daily average of not more than 95%, month average of not more than 90%.Â
4. Earthquake intensity: not more than ten.Â
5. No fire, explosion hazard, serious filthy, chemical corrosion, as well as places of intense vibration.
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Mainly technical parameters | |||
NO | Item | Units | parameters |
1 | Rated voltage | KV | 12 |
2 | Rated Frequency | HZ | 50/60 |
3 | Rated Current | A | 4000AÂ |
4 | Rated short-circuit breaking current | KA | 40KA |
5 | Rated short-circuit closing current (peak) | KA | 50 63 80 |
6 | Rated short-circuit duration | S | 4 |
7 | Rated short-circuit breaking current breaking number | nos | 50s |
8 | Rated operating sequence | Â | 0-0.3s-CO-180s-CO |
9 | Rated lightning impulse withstand voltage | kv | 125 |
10 | 1min power frequency withstand voltage | KV | 65 |
11 | Closing time | ms | ≤ 70 |
12 | opening time | ms | ≤ 50 |
13 | Mechanical life | Times | 20000 |
14 | Rated Storage and operation voltage | V | AC DC 220/110 |
15 | Breaking life | ms | ≤ 80 |
16 | Storage life | s | ≤ 10 |
      Adjust the parameters of mechanical properties: | |||
No | Item | Unit | Parameters |
1 | Contact distance | mm | 14±1 |
2 |   Contact Over-travel | mm | 3.5±1 |
3 | Closing speed | m/s | 1.0±0.2 |
4 | Opening speed | m/s | 1.3±0.2 |
5 | Contact closing spring time | ms | ≤2 |
6 | Rated contact pressure | N |  40KA (4000±200) |
7 | Three phase closing opening asynchrony | ms | ≤2 |
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