VS1-24/630A indoor fixed high voltage vacuum circuit breaker
product description
Product name: VS1-24 indoor high voltage vacuum circuit breaker
Category: high voltage components
Product introduction: VSl-24 indoor high-voltage vacuum circuit breaker is an indoor switchgear with a three-phase AC 50Hz rated voltage of 24kV power system. It is used as a protection and control unit for power grid equipment and industrial and mining enterprise power equipment. It is suitable for places requiring frequent operation under rated industrial current, or multiple interruption of short-circuit current.
Applicable environment of VS1-24 indoor high voltage vacuum circuit breaker
A Ambient air temperature E upper limit +40℃, lower limit -15℃;
b Altitude: ≤1000m (if the altitude needs to be increased, the rated insulation level shall be increased accordingly);
c Amplitude: the seismic intensity does not exceed 8 degrees;
d The daily average value of air relative humidity is not more than 95%, and the monthly average value is not more than 90%
e A place free from fire, explosion, serious pollution, chemical corrosion and severe vibration.
The main technical parameters
| Serial number | project | unit | Numerical value |
| 1 | Rated voltage | KV | 24 |
| 2 | Rated short-time power frequency withstand voltage(1min) | 65/79(Alternating, to ground/fracture) |
| 3 | Rated lightning impulse withstand voltage (peak value) | 125/145(Alternating, to ground/fracture) |
| 4 | Rated frequency | HZ | 50 |
| 5 | Rated current | A | 630
1250 | 630 1250 1600
2000 2500 3150 | 630 1250 1600
2000 2500 3150 |
| 6 | Rated short-circuit breaking current | KA | 20/25 | 31.5 | 40 |
| 7 | Rated short-time withstand voltage | | 20/25 | 35.5 | 40 |
| 8 | Rated short-circuit duration | S | 4 |
| 9 | Rated peak 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) | V | 200 |
| 12 | Rated single/back-to-back capacitor bank breaking current | A | 630/400 (40KA is 800/400) |
| 13 | Rated capacitor bank closing inrush current | KA | 12.5 (Frequency is not more than 1000Hz) |
| 14 | Mechanical life | Second-rate | 20000 |
| 15 | Rated current breaking times (electric life) | 20000 |
| 16 | Rated short-circuit current breaking times | | 50(40KA≤30) |
| 17 | The cumulative thickness of the moving and static contacts allowed to wear | mm | 3 |
| 18 | Energy storage time | S | ≤10 |
| 19 | Contact opening distance | MM | 16±1 |
| 20 | Overtravel | 3.5±0.5 |
| 21 | Bounce time of contact closing | MS | ≤2(40KA≤3) |
| 22 | Three-phase opening and closing without interval | ≤2 |
| 23 | Average opening speed (contact separation -8mm) | M/S | 1.5±0.2 |
| 24 | Average closing speed (8mm-contact closed) | 0.8±0.2 |
| 25 | Main conductive loop resistance | μΩ | ≤50(630A)≤45(1250A)
≤35(1600-2000A)≤25(2500Aabove) |
| 26 | Rated operating sequence | | Points-0.3S-combined points 180S-combined points |
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