Description:
The VCB in the GIS cabinet is a high-voltage circuit breaker used to protect equipment and personnel in the power system from the effects of power system overload, short circuits, and ground faults. This device is suitable for power transmission and distribution systems ranging from 10 kV to 35 kV, and has the advantages of reliable short circuit protection, fast closing speed, and convenient operation. Its main components include mechanisms, electrical components, control circuits, etc. This de...
Working condition
O Altitude is not more than 1000m, earthquake intensity is not more than 8 degrees. O Pollution resistance level: II.. O Ambient temperature: -40C ~+140% . relative humidity daily average≤90%, monthly average≤90%. O Frequently vibrating installation sites, places with water vapor, gas, chemical corrosive deposits, salt spray, dust and dirt, and fires, that significantly affect the performance of the Mechanism and places with fire or explosion hazards are not suitable.
Drawing
No. | ltem | Unit | Data |
1 | Rated frequency | Hz | 50 |
2 | Rated current | A | 630 |
3 | Rated short time withstand current | KA | 20/25 |
4 | Rated peak withstand current | KA | 50 |
5 | Rated short circuit duration | S | 4 |
6 | Rated short circuit closing current | KA | 50 |
7 | Rated operation sequence | O-0.3s-180s-CO | |
Mechanical specification
No. | ltem | Unit | Data |
1 | Circuit Breaker main loop resistance | UΩ | ≤30 |
2 | Overtravel | mm | 2-3 |
3 | Spacing | mm | 8-10 |
4 | Bounce | MS | ≤2 |
5 | Opening average speed | m/s | 0.6-1.4 |
6 | Closing average speed | m/s | 0.4-1.1 |
7 | Opening three phase asynchronous | MS | ≤2 |
8 | Closing three phase asynchronous | Ms | ≤2 |
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