Summary
VCB(VS1)-12 type indoor high VCB, is a three-phase ac 50Hz rated voltage of 12kV power system indoor switch equipment, as power grid equipment, industrial and mining enterprise power equipment protection and control unit. It is suitable for frequent operation under the rated working current, or the place where short-circuit current is turned on multiple times.
The circuit breaker is designed with operating mechanism and circuit breaker body. which can be used as a fixed installation unit, and it can also be equipped with a special propulsion mechanism.
Main Product Technical
| NO | Item | Units | Technical parameters | ||
| 1 | Rated voltage | KV | 12 | ||
| 2 | Rated short-duration power frequency withstand voltage | 42/48(Interphase, ground/fracture) | |||
| 3 | Rated lightning impulse withstand voltage | 42/48(Interphase, ground/fracture) | |||
| 4 | Rated frequency | Hz | 50 | ||
| 5 | Rated current | A | 630 1250 | 630 1250 16002000 2500 3150 | 630 1250 16002000 2500 3150 |
| 6 | Rated short-circuit breaking current | KA | 20/25 | 31.5 | 40 |
| 7 | Rated short-time withstand voltage | 20/25 | 31.5 | 40 | |
| 8 | Rated short circuit duration | S | 4 | ||
| 9 | Rated peak withstand current | KA | 50/63 | 80 | 100 |
| 10 | Rated short circuit closing current | 50/63 | 80 | 100 | |
| 11 | Secondary circuit power frequency withstand voltage (1min) | 2000 | |||
| 12 | Rated single / back to back capacitor group breaking current | A | 630/400(40kA:800/400) | ||
| 13 | Rated capacitor bank closing current | 12.5 (frequency is not greater than) | |||
| 14 | Mechanical life | KA | 20000 | ||
| 15 | Rated current breaking times (electrical life) | 20000 | |||
| 16 | Rated short circuit current breaking times | times | 50(40KA≤30) | ||
| 17 | Dynamic and static contacts allow wear cumulative thickness | mm | 3 | ||
| 18 | Energy storage time | s | ≤10 | ||
| 19 | Contact opening distance | mm | 11±1 | ||
| 20 | Overtravel | 3.5±0.5 | |||
| 21 | Contact closing bounce time | ms | ≤2(40KA≤3) | ||
| 22 | Three-phase split/closed period | ≤2 | |||
| 23 | Average opening speed (contacts are separated by -8mm) | m/s | 1.2±0.2 | ||
| 24 | Main conductive loop resistance | 0.6±0.2 | |||
| 25 | Main conductive loop resistance | μΩ | ≤50(630A)≤45(1250A)≤40 (1600,2000A)≤35 (2500A or more) | ||
| 26 | Rated operation sequence | 0-0.3s-Co-180s-Co | |||
