VGK Series Indoor High Voltage Vacuum Circuit Breaker used in Air insulated cabinet
Product Description
VGK-I-12 series indoor high voltage AC Vacuum Circuit Breaker
Summary
VGK-I-12 series indoor high voltage AC Vacuum circuit breaker (vertical rotary isolation type) is an Indoor Switchgear for 12kV power system. It is used as protection and control unit for power grid equipment and industrial and mining enterprises. The nature of the load and frequent operation, multiple occasions of short-circuit current. The product adopts the new Circuit breaker Operating Mechanism, the vacuum interrupter and the main conductive circuit parts are solidly sealed in one part to protect the arc extinguishing chamber from collision, dust and condensation. The environment adaptability is strong, the operation and maintenance cost is greatly reduced, and the product is realized once. Partially maintenance-free, the operating mechanism is less maintenance; the operating mechanism is integrated with the Circuit Breaker and the Isolating switch. It has been tested by type test and has E2 electrical life and M2 mechanical life.
Main Technical Specification
| No. | Parameters name | Unit | Parameters
| ||||||
| Circuit breaker | Load switch | ||||||||
| 1 | Rated voltage | kV | 12 | ||||||
| 2 | Rated current of main busbar | A | 630 | 1250 | |||||
| 3 | Rated frequency | Hz | 50 | ||||||
| 4 | Rated short time withstand current | Main circuit | kA | 25 | 31.5 | ||||
| Ground circuit | 21.7 | 27.4 | |||||||
| 5 | Rated short-time peak current | Main circuit | 63 | 80 | |||||
| Ground circuit | 54.5 | 68.5 | |||||||
| 6 | Rated short circuit withstand time | Main circuit | s | 4 | |||||
| Ground circuit | 2 | ||||||||
| 7 | Rated short circuit closing current (peak) | kA | 63 | 80 | |||||
| 8 | Rated short circuit breaking current | 25 | 31.5 | ||||||
| 9 | Rated short circuit breaking times | Times | 30 | ||||||
| 10 | Rated operation sequence | O-0.3s-CO-180s-CO | |||||||
| 11 | Mechanical life | Circuit breaker (load switch) | Times | 10000 | |||||
| Three-position switch | 5000 | ||||||||
| 12 | Rated insulation level | 1min power frequency withstand voltage (effective value) | Phase, to ground | kV | 42 | ||||
| Fracture | 48 | ||||||||
| Lightning impulse withstand voltage (peak) | Phase, to ground | 75 | |||||||
| Fracture | 85 | ||||||||
| Power frequency withstand voltage of secondary circuit | V | 2000 | |||||||
| 13 | Contact opening distance | mm | 9±1 | ||||||
| 14 | Overtravel | 3±0.5 | |||||||
| 15 | Interphase center distance | 210±1 | |||||||
| 16 | Closing contact bounce time | ms | ≤2 | ||||||
| 17 | Three phase asynchronous of opening | ≤2 | |||||||
| 18 | Opening time
When the operating voltage is | highest | 17~55 | ||||||
| rated | |||||||||
| Minimum | |||||||||
| 19 | Closing time | ms | 30~70 | ||||||
| 20 | Average opening speed (first 6mm average) | m/s | 1.0~1.8 | ||||||
| 21 | Average closing speed (after 6mm average) | 0.8~1.4 | |||||||
| 22 | Main conductive circuit’s resistance | μΩ | ≤100 | ||||||
| 23 | Contact pressure | N | 3200±150 | ||||||
| 24 | Opening contact’s rebound amplitude | mm | ≤2 | ||||||
VGK-I-12 series indoor high voltage AC vacuum circuit breaker
Product Categories : VGK series > VGK circuit breaker
