FN83-24KV series VCB
24kv Indoor Medium Voltage Embedded Pole Type Vacuum Circuit Breaker
Product Description
1.General description
FN83-24KV is optimized modular spring operating mechanism is adopted in the mechanism part,which has high reliability,long service life and free maintenance.
FN83-24KV series vacuum circuit breaker can be used as the protection and control unit of power equipment for industrial and mining enterprises.It is especially suitable for the worse environment with frequent operation,multiple disconnection of short-circuit
2. Main technical parameter
| Item | Unit | Date |
| Rated voltage | kV | 24 |
| Rated frequency | Hz | 50 |
| Rated insulation level | 1min power frequency withstand voltage | pole to earth | kV | 65 |
| phase | kV | 79 |
| lightning impulse withstand voltage | pole to earth | kV | 125 |
| phase | kV | 145 |
| Power frequency withstand voltage of secondary circuit | V | 2000 |
| Rated current | A | 630 | 630 | 1250 | 1250 |
| 1250 | 1250 | 1600 | 3150 |
|
| 2000 |
|
| Rated short-circuit breaking current | kA | 20 | 25 | 31.5 |
| Rated short-time withstand current | kA | 20 | 25 | 31.5 |
| Rated short circuit duration | s |
|
| Rated peak withstand current | kA | 50 | 63 | 80 |
| Rated short-circuit making current | kA | 50 | 63 | 80 |
| Rated short-circuit current breaking time (classE2) | times | 30 |
| Rated single/back to back capacitor bank breaking current | A | 630/400 |
| Clearance between open contacts | mm | 12~14 |
| Contact stroke | mm | 3~5 |
| Allowable wear thickness of contact | mm | 3 |
| Average opening speed | m/s | 1.1~1.6 |
| Average closing speed | m/s | 0.6~1.1 |
| Contact closing bounce time | ms | ≤2 |
| Different phase of contact closing and opening | ms | ≤2 |
| Rebound amplitude of opening contact | mm | ≤2 |
| Opening time (rated voltage) | ms | 20~50 |
| Closing time (rated voltage) | ms | 30~70 |
| Mechanical life (M2) | times | 10,000(20,000) |
| Rated operating voltage | V | AC110/220 DC110/220 |
| Rated operation sequence |
| 0-0.3s-CO-180s-CO |
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