| Place of Origin: | Zhejiang, China |
|---|---|
| Brand Name: | XK |
| Certification: | ISO9001 / GB / IEC |
| Model Number: | VB7M |
| Minimum Order Quantity: | 1 Piece/Pieces |
| Price: | Negotiation |
| Packaging Details: | EXPORTING PACKING |
| Supply Ability: | 100 Piece/Pieces per Month |
| Standard: | IEC | Rated Current: | 630A,1250A, 1600A |
|---|---|---|---|
| Rated Voltage: | 12KV | Mechanical Life: | 10000 |
| Usage: | RING MAIN UNIT, SUBSTATION, NON-STD POWER SUPPLY SYSTEM | Port: | NINGBO |
| High Light: | outdoor vcb breaker,indoor vcb panel |
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DISADVANTAGE OF VACCUM CIRCUIT BREAKER
Requirements of high technology for production of vacuum interrupters.
It needs additional surge suppressors for the interruption of low magnetizing currents in a certain range.
Loss of vacuum due to transit damage or failure makes the entire interrupter useless, and it cannot be repaired on site.
APPLICATIONS OF VACUUM CIRCUIT BREAKER
Because of the short gap and excellent recovery of vacuum circuit breaker, they are very useful as very high speed making switches in many industrial applications.
When the voltage is high and current to be interrupted is low these breakers have definite superiority over the other breakers.
For low fault interrupting capacities the cost is low in comparison to other interrupting devices.
Because of the least requirements of maintenance, these breakers are very suitable for the system which requires voltage from 11 to 33 kV
| Item | Unit | Data | |||
| Rated voltage | KV | 12 | |||
| Maximum working voltage | KV | 12 | |||
| Rated Current | A | 630-1250 | 630-1600 | 630-1600 | |
| Rated short circuit breaking current | KA | 20 | 25 | 31.5 | |
| Rated short-circuit switching 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 | 1min Power frequency withstand voltage | KV | 42(fracture 48) | ||
| lmpulse withstand voltage | KV | 75(fracture 84) | |||
| Rated short-circuit current breaking times | Times | 50 | |||
| Rated Operating Mechanism Closing Voltage(DC) | V | AC,DC 110,220 | |||
| Rated Operating Mechanism Opening Voltage(DC) | V | AC,DC 110,220 | |||
| Contact opening distance | mm | 11±1 | |||
| Overtravel(the length of contact spring compression) | mm | 3.5±0.5 | |||
| Closing/Opening Time Difference Among Three Phase | ms | ≤2 | |||
| Contact closing bounce time | ms | ≤2 | |||
| Average opening speed | m/s | 0.9-1.2 | |||
| Average closing speed | m/s | 0.5-0.8 | |||
| Tripping Time | Maximum operating voltage | S | ≤0.05 | ||
| Minimum operating voltage | S | ≤0.08 | |||
| Closing time | S | 0.1 | |||
| The main circuit resistance of each phase | 630≤50 | 1250≤45 | 1600≤40 | ||
| Allowed Consumpted thickness of Contacts | mm | 3 | |||
