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VBI Spring Actuating Mechanism
This VBI actuating mechanism is for VBI-12 vacuum circuit breaker is a type of indoor high voltage VCB, suitable for 3 phase AC 50 Hz, and rated voltage of 12kV, and applied in places with breaking of different load and frequent operations as protection and control unit, such as industrial and mining enterprise, power plants and transformer substations.
Electrical ProductsSpecifications of VBI Spring Actuating Mechanism
This VBI actuating mechanism is for VBI-12 vacuum circuit breaker is a type of indoor high voltage VCB, suitable for 3 phase AC,50 Hz, and rated voltage of 12kV, and applied in places with breaking of different load and frequent operations as protection and control unit, such as industrial and mining enterprise, power plants and transformer substations.
Technical Parameters of VBI Spring Actuating Mechanism
| Item | Unit | Data | |
| Rated voltage | kV | 12 | |
| Rated insulation voltage | 1 min power frequency withstand voltage | kV | 65 |
| Lightning impulse withstand voltage(peak) | kV | 75 | |
| Rated frequency | Hz | 50/60 | |
| Rated current | A | 630,1250,1600,2000,2500,3150 | |
| Rated short-time withstand current | kV | 20,25,31.5 | |
| Rate peak withstand current | 50,63,80 | ||
| Rate short-circuit duration | S | 4 | |
| a.c. component of rate short-circuit breaking current | kA | 42 | |
| Rated short-circuit making current | kA | 50,63,80,100 | |
| Mechanical life | time | 10000 | |
| Permitted abrasion thickness of moving and fixed contacts | mm | 3 | |
| Arcing time | ms | ≤15 | |
Use conditions of VBI Spring Actuating Mechanism
1. Altitude not exceeding 2000m;
2. Ambient temperature: -15°c ~+40°c;
3. Relative humidity: monthly average not exceeding 95%, daily relative humidity not exceeding 95%;
4. Earthquake level not exceeding 8 class;
5. Without peril of fire, corrosion gas, explosion, vibration.
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