| Customization: | Available |
|---|---|
| Breaking Capacity: | High Voltage Circuit Breakers |
| Operation: | Energy-storage Type |
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The 12kV series vacuum interrupter is a top-of-the-line product that boasts a ceramic insulating shell, a middle sealing or built-in fixed shielding tube, and copper and chromium alloy contact material. The cup-shaped longitudinal magnetic electrode has been optimized to ensure uniform electromagnetic field distribution, which greatly improves the stability of the breaking capacity. Additionally, a special sophisticated process has been implemented to enhance the insulation level of the product. This exceptional product has been designed to meet the specific needs of our customers. VACEM has introduced two series of 12kV vacuum interrupters, which can be used for air insulation, embedded insulation, or external insulation protection. These interrupters are perfectly suited for use as control and protection devices in transmission and distribution electrical power grids with a frequency of 50Hz/60Hz, rated voltage of 12kV, rated current of 630A-4000A, and rated short circuit breaking current of 5kA-40kA. VI is mainly applied to VZN63-12kV series indoor MV vacuum circuit breaker. Meets or exceeds the requirement of IEC62271-100 and E2 level in GB1984-2003.
Specification of VI
| Parameter item | Unit | Data |
| Rated voltage | kV | 12 |
| Rated current | A | 1250 |
| Rated frequency | Hz | 50 |
| Rated short-time power frequency withstand voltage(1 min) | kV | 42 |
| Rated lightning impulse withstand voltage | kV | 75 |
| Rated short-circuit breaking current | kA | 25/31.5 |
| Rated peak withstand current | kA | 63/80 |
| Rated short-circuit making current | kA | 63/80 |
| Rated short-time withstand current | kA | 25/31.5 |
| Rated short-circuit duration | s | 4 |
| Rated single capacitor bank breaking current | A | 630 |
| Rated back to back capacitor bank breaking current | A | 400 |
| Breaking operation of rated short circuit breaking current | times | 30 |
| Mechanical life | times | 10000 |
| Contact closing force due to bellows and atomsphere | N | 100±40 |
| Force required to hold contact open at full stroke | N | 160±50 |
| Circuit resistance at lowest rated contact force | μΩ | ≤20 |
| Contact limit erosion | mm | 3 |
| Internal gas pressure | Pa | ≤1.33×10-3 |
| Weight of moving parts | kg | 1.1 |
| Storage life | year | 20 |
| Parameter item | Unit | Data |
| Rated clearance between open contacts | mm | 11±1 |
| Average opening speed | m/s | 1.1±0.2 |
| Average closing speed | m/s | 0.6±0.2 |
| Rated contact pressure | N | 2500±200 3100±200 |
| Contact bouncing duration at closing operation | ms | ≤2 |
| Closing and opening non-simultaneity of contacts | ms | ≤2 |
| Maximum rebound during opening | mm | ≤2 |
| Rated contact stroke | mm | 3.5±0. |
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