24KV 1250A Side Mounted Embedded Solid Seal Switchgear Vacuum Circuit Breaker
VCB-12 side mounted embedded solid seal switchgear VCB Vacuum Circuit Breaker
Intorduction:
VBR (VS1)- 12 side-mounted vacuum circuit breaker is an indoor high-voltage switchgear for three-phase power system with rated voltage of 12 kV and frequency of 50 Hz. It is used as protection and control electric appliance due to special vacuum circuit breaker. Superiority, especially suitable for frequent operations requiring rated current or multiple short-circuit currents.
The VBR (VS1)-12 type side-mounted vacuum circuit breaker is fixedly mounted and is mainly used for fixed switchgear. The circuit breaker can be used alone or in ring power supply, box type or various non-standard power supply. system.
The main technical parameters:
| NO | Item | Units | Technical parameters | |||||
| 1 | Rated voltage | kV | 12 | |||||
| 2 | Maximum working voltage | kV | 12 | |||||
| 3 | Rated current | A | 630/1250 | 630/1250 | 630/1250/1600 | |||
| 4 | Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | |||
| 5 | Rated short circuit closing current | kA | 50 | 63 | 80 | |||
| 6 | Rated peak withstand current | kA | 50 | 63 | 80 | |||
| 7 | 4S rated short circuit withstand current | kA | 20 | 25 | 31.5 | |||
8 | Rated insulation level | Power frequency withstand voltage (before and after rated breaking) | kV | 42(Fracture:48)
| ||||
| Impact withstand voltage (before and after rated breaking) | | |||||||
| 9 | Rated operation sequence | 0-0.3s-Co-180s-Co | ||||||
| 10 | Mechanical life | times | 10000 | |||||
| 11 | Rated short circuit current breaking times | times | 50 | |||||
| 12 | Operating mechanism rated closing voltage (DC) | V | 110,220 | |||||
| 13 | Operating mechanism rated trip current (DC) | V | 110,200 | |||||
| 14 | Contact stroke | mm | 11±1 | |||||
| 15 | Overtravel (contact spring compression length) | mm | 3.5±0.5 | |||||
| 16 | Three-phase split and close bounce time | ms | ≤2 | |||||
| 17 | Contact closing bounce time | ms | ≤2 | |||||
| 18 | Average opening speed | m/s | 1.2±0.2 | |||||
| 19 | Average closing speed | m/s | 0.6±0.2 | |||||
| 20 | Opening time | At the highest operating voltage | s | ≤0.05 | ||||
| At the lowest operating voltage | ≤0.08 | |||||||
| 21 | Closing time | S | 0.1 | |||||
| 22 | Main loop resistance of each phase | μΩ | 60 | 50 | ||||
| 23 | Dynamic and static contacts allow wear cumulative thickness | mm | 3 | |||||
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