VS1-12 Type Side-Mounted(Vbm7) Vacuum Circuit Breaker
VS1-12 type side-mounted(VBM7) vacuum circuit breaker is an indoor high voltage switchgear, suitable for the three-phase power system of rated voltage 12kV and 50Hz to protect and control the appliances. due to its special advantages, it is quite suitable for the occasion when the frequent operation at the rated current or breaking the short-circuit current is needed.VS1-12 type side-mounted(VBM7)vacuum circuit breaker adopts the fixed type installation, mainly used for the fixed type switchgear, it can be used separately, it can also be used for the ring net power supply, box type transformer substation or kinds of non-standard power systems.
Specification Parameter
| Item | unit | parameter | |||||
| Rated voltage | kV | 12 | |||||
| Max working voltage | kV | 630 | 630 | 630 | |||
| Rated current | A | 1250 | 1250 | 1250 | |||
| Rated short circuit breaking current | kA | 20 | 25 | 31.5 | |||
| Rated short circuit closing current | kA | 50 | 63 | 80 | |||
| Rated peak withstand current | kA | 50 | 63 | 80 | |||
| 4S rated short circuit withstand current | kA | 20 | 25 | 31.5 | |||
| Rated insulation level | Power frequency withstand voltage (Before and after rated interruption) | kV | 42(48) | ||||
| impulse withstand voltage (Before and after rated interruption) | times | 75(84) | |||||
| Rated operating sequence | O-0.3s-CO-180s-CO | ||||||
| Mechanical life | times | 10000 | |||||
| Rated short-circuit breaking current breaking times | times | 50 | |||||
| Rated closing voltage of operating mechanism(DC) | V | 110,220 | |||||
| Rated opening voltage of operating mechanism(DC) | V | 110,220 | |||||
| Clearance between open contacts | mm | 111 | |||||
| Over stroke(compression length of contact spring) | mm | 3.50.5 | |||||
| Three-phase opening and closing | ms | ≤2 | |||||
| Closing bouncing time of contacts | ms | ≤2 | |||||
| Average opening speed | m/s | 0.9-0.12 | |||||
| Average closing speed | m/s | 0.4-0.8 | |||||
| Opening time | At maxoperating voltage | s | ≤0.05 | ||||
| At min operating voltage | ≤0.08 | ||||||
| Closing time | s | 0.1 | |||||
| Main circuit resistance of each phase | μΩ | 60 | 50 | ||||
| Total thickness of permissible wear of moving and static contacts | mm | 3 | |||||
Product Advantage
1. Compact size and light weight: This allows for easy installation in confined spaces and reduces overall equipment footprint, making it ideal for integration into various switchgear setups.
2. High suitability for frequent operation: It excels in environments requiring repeated switching, such as industrial or grid applications, due to its robust design that handles rated current operations and multiple short-circuit interruptions efficiently.
3. Maintenance-free arc quenching: The vacuum interrupter technology eliminates the need for regular maintenance of the arc extinguishing system, enhancing reliability and reducing operational downtime.
4. Compact structure with minimal width dimensions: Featuring a longitudinal three-phase layout, it ensures space efficiency and seamless integration into fixed installations like box-type substations and ring main units (RMUs).
5. Compliance with international standards: It meets stringent specifications such as IEC 62271-100, GB/T 1984, and DL/T 403, ensuring safety, performance consistency, and broad applicability across global power systems.
6. Optional intelligent monitoring capabilities: Intelligent components enable real-time online diagnostics of parameters like contact temperature, mechanical characteristics, and partial discharges, supporting remote management via IoT platforms for predictive maintenance.
7. Versatile application range: Widely used in diverse settings including power plants, grids, industrial facilities, and urban infrastructure (e.g., airports, buildings, metros), it provides reliable protection and control for cables, transformers, and capacitor banks.
Outline And Mounting Dimensions
