VS1-12 indoor high-voltage vacuum circuit breaker is an indoor switchgear for three-phase AC 50Hz rated voltage of 12kV power system, as a protection and control unit for power equipment of grid equipment and industrial and mining enterprises. It is suitable for frequent operation under the rated working current, or for the place where the short-circuit current is broken by multiple crossings.
The circuit breaker adopts the design of operating mechanism and circuit breaker body, which can be used as fixed installation unit or withdrawable unit.
VS1-12 indoor HV vacuum circuit breaker is a 3-phase AC 50Hz 12kV indoor switch equipment.
♦ Installation way: withdrawable type, fixed type, side mounted type;
♦ Operating mechanism: spring ope rating mechanism, permanent magnetic operating mechanism;
♦ Pole type: assembled pole, embedded pole;
♦ Application: switchgear KYN28-12, XGN-12.
♦ Secondary plug: 58pins, 64pins.
Product Standards
♦ IEC62271-100 High Voltage Switchgear and Controlgear Part 100: AC Circuit-breakers
♦ GB1984 High Voltage AC Circuit-breakers
♦ GB/T11022 Common Specifications for High-voltage Switchgear and Controlgear Standards
♦ JB/T 3855 High Voltage AC Vacuum Circuit-breakers
♦ DL/T402 Specification of High-voltage AC Circuit-breakers
Environmental Conditions
♦ Ambient temperature: -15°C~+40°C;
♦ Altitude:
♦ Relative humidity: daily average
♦ Earthquake intensity:
♦ Places without fire, explosion hazard, serious filthy, chemical corrosion, as well as intense vibration.
Main Technical Parameters
| No | Item | Unit | Value |
| 1 | Rated voltage | kV | 12 |
| 2 | 1 min power frequency withstand voltage | 42 | |
| 3 | Rated lightning impulse withstand voltage | 75 | |
| 4 | Rated frequency | Hz | 50 |
| 5 | Rated current | A | 630, 1250, 1600, 2000, 2500, 3150, 4000 |
| 6 | Rated short circuit breaking current | kA | 20, 25, 31.5, 40 |
| 7 | Rated short time withstand current | 20, 25, 31.5, 40 | |
| 8 | Rated short circuit duration | s | 4 |
| 9 | Rated peak value withstand current | kA | 50, 63, 80, 100 |
| 10 | Rated short circuit making current | 50, 63, 80, 100 | |
| 11 | Secondary circuit power frequency withstand voltage (1min) | IN | 2000 |
| 12 | Rated single / back-to-back capacitor bank breaking current | A | 630/400 (800/400 for 40kA and 50kA) |
| No | Item | Unit | Value |
| 13 | Rated capacitor bank closing inrush current | A | 12.5 |
| 14 | Opening time (rated voltage) | ms | 20-50 |
| 15 | Closing time (rated voltage) | ms | 35-70 |
| 16 | Mechanical life | Times | 10000 |
| 17 | Rated current breaking number | Times | 10000 |
| 18 | Rated short circuit current breaking number | Times | 50 (30 for 40kA; 20 for 50kA) |
| 19 | Moving and fixed contacts cumulative allowed wear thickness | mm | 3 |
| 20 | Rated closing operating voltage | IN | AC/DC110/220 |
| twenty one | Rated opening operating voltage | ||
| twenty two | Rated voltage of energy storage motor | IN | 70 (80 ror 40kA and 50kA) |
| twenty three | Rated power of energy storage motor | ||
| twenty four | Energy storage time | s |
|
| 25 | Clearance between open contacts | mm | 11±1 |
| 26 | Over travel | mm | 3.5±0.5 |
| 27 | Contact closing bounce time | ms | ≤2 (≤3 for 40kA and 50kA) |
| 28 | Three phase opening and closing asynchronism | ms | ≤2 |
| 29 | Average opening speed | m/s | 0.9-1.2 |
| 30 | Average closing speed | m/s | 0.5-0.8 |
| 31 | Main conductive circuit resistance | mΩ | ≤60 (630A) ≤50(1250A) ≤35(1600-2000A) ≤25(above 2500A) |
| 32 | Closing contact pressure of the contacts | N | 2000±200(20kA) 2400±200(25kA) 3100±200 (31.5kA) 4250±250 (40kA) 6500±500 (50kA) |
| 33 | Rated operating sequence | O-0.3s-CO-180s-CO O-180s-CO-180s-CO (50kA) |
