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VVS-12kV/1250A type permanent magnet operating mechanism vacuum circuit breaker is a circuit breaker with quick split function developed by our company.
The vacuum circuit breaker of permanent magnet mechanism is installed indoors and air insulated. It is used to switch open and close various power loads of different properties. It is suitable for urban power grid, rural power grid and other power grid construction and transformation projects, especially for frequent operation within the working current range and occasions with certain requirements for short-circuit breaking performance. The product absorbs advanced technologies and processes at home and abroad. It has the characteristics of intelligence, high reliability, long service life and maintenance free. When used, it has no pollution to the surrounding environment. It is a green environmental protection product.
2.Technical parameters
Table 1 Technical parameters
No. | Item | Unit | Data | |
1 | Rated voltage | kV | 12 | |
2 | Rated frequency | Hz | 50 | |
3 | Rated insulation level | 1min power frequency withstand voltage | kV | 42/48 |
Lightning impulse withstand voltage | 75/85 | |||
4 | Rated current | A | 630（1000；1250） | |
5 | Partial discharge value (14.4kV/1min) | pC | ≤5 | |
6 | Rated short-time withstand current | kA | 20（25；31.5） | |
7 | Rated peak withstand current | kA | 50（63:80） | |
8 | Rated short-circuit current duration | S | 4 | |
9 | Rated short-circuit current breaking times | times | 30 | |
10 | Rated thermal stability time | S | 4 | |
11 | Mechanical life | times |
| |
12 | Rated energy storage voltage | V | AC/DC: 24V;48V;110V;220V | |
13 | Rated closing and opening operating voltage | V | AC/DC:24V;48V;110V;220V | |
10000
Table 2 Mechanical parameters
No. | Item | Unit | Data |
1 | Clearance between open contacts | 8.5±0.3 | |
2 | Contact overtravel | mm | 2.5±0.5 |
3 | O/C asynchronous | ms | ≤2 |
4 | Contact closing bounce time | ms | ≤2 |
5 | Phase distance | mm | (150;180;200;230;250;275;300)±1.0 |
6 | Closing speed | m/s | 0.8±0.2 |
7 | Opening speed | m/s | 1.6±0.2 |
8 | Closing time | ms | ≤50 |
9 | Opening time | ms | ≤15 (Inherent time less than 5) |
10 | Controller energy storage time | s | ＜5A |
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