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Product Details:
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| Normal Voltage: | 12KV | Normal Current: | 630-2000A |
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| Breaking Current: | 25KA | Type: | Withdrawable |
| Original: | Zhengzhou, CHINA | Manufactory: | KNKONG |
| High Light: | 12KV Withdrawable VCB Circuit Breaker,25KA Magnetic Control VCB Circuit Breaker,Indoor Switchgear Vacuum Circuit Breaker |
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VS1-12KV withdrawable vacuum circuit breaker indoor switchgear use
Voltage: 12KV
Current: 630-2000A
Breaking current: 20KA
Type: withdrawable
Product overview
VS1-12 vacuum circuit breaker, empty, when the moving and static contacts are energized and opened under the action of the operating mechanism, a vacuum arc will be generated between the contacts. At the same time, due to the special structure of the contacts, in the contact gap Appropriate longitudinal magnetic field will also be generated, which will keep the vacuum arc as a diffusion type, make the arc evenly distributed on the contact surface and burn, and maintain a low arc voltage. It can be compounded or accumulated on the surface of the contact and the shield in seconds, and the dielectric strength of the arc extinguishing chamber fracture is quickly restored, so that the arc is extinguished and the purpose of breaking is achieved. Because the vacuum circuit breaker adopts magnetic field control Vacuum arc, so it has a strong and stable ability to break current.
Normal service condition
| Altitude | ≤1000m | |
| Ambient temperature | Max | +40℃ |
| Min | -15℃ | |
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Ambient humidity: Maximum average humidity |
24 hours ≤95% | |
| 1 month ≤90% | ||
| Maximum water vapor pressure | 24 hours ≤2.2kpa | |
| 1 month ≤1.8kpa | ||
Technical Parameters
| No. | Item | Unit | Parameter | ||||||
| 1 | Rated voltage | KV | 12 | ||||||
| 2 | Rated frequency | Hz | 50/60 | ||||||
| 3 |
Rated insulation level |
1min power frequency withstand voltage(r. m. s) |
KV |
42(phase-to-phase, phase-to-earth) 48(across the isolating distance) |
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| Lighting impulse withstand voltage (peak) |
75(phase-to-phase, phase-to-earth) 85(across the isolating distance) |
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4 |
Rated current |
A |
630 | 630 | 1250 | 1600 | |||
| 1250 | 1250 | 1600 | 2000 | ||||||
| 2000 | 2500 | ||||||||
| 2500 | 3150 | ||||||||
| 4000 | |||||||||
| 5 | Rated short-circuit breaking current |
KA |
20 | 25 | 31.5 | 40 | |||
| 6 | Rated short-time withstand current | 20 | 25 | 31.5 | 40 | ||||
| 7 | Rated short-circuit marking current | 50 | 63 | 80 | 100 | ||||
| 8 | Rated peak withstand current | 50 | 63 | 80 | 100 | ||||
| 9 | Rated duration of short-circuit | s | 4 | ||||||
| 10 | Rated operating sequence | O-0.3s-O/C-180s-O/C | |||||||
| 11 | Breaking times of rated short-circuit current | Times | 30/20 times(40KA) | ||||||
| 12 | Mechanical endurance | Ops | 20000 | ||||||
| 13 | Rated single capacitor bank breaking current |
A |
630 | ||||||
| 14 | Rated back-to-back capacitor bank breaking current | 400 | |||||||
| 15 | Double-earth fault breaking current | 27.4 | |||||||
| 16 | Allowable maximum contact erosion |
mm |
3 | ||||||
| 17 | Clearance between open contacts | 10±1 | |||||||
| 18 | Over stroke | 3.5±0.5 | |||||||
| 19 | Non-simultaneity of 3-phase opening and closing |
ms
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≤2 | ||||||
| 20 | Bounce duration of contact closing | ≤2 | |||||||
| 21 | Average breaking speed (instant breaking 6mm) |
m/s
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1.1±0.2 | ||||||
| 22 | Average making speed | 0.8±0.2 | |||||||
| 23 | Making time |
ms
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≤100 | ||||||
| 24 | Breaking time | ≤50 | |||||||
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25 |
Resistance of each phase main circuit |
μ Ω |
630A | ≤50 | |||||
| 1250A | ≤45 | ||||||||
| 1600A~2000A | ≤35 | ||||||||
| ≥2500A | ≤25 | ||||||||
| 26 | Contact breaking bounce amplitude | mm | ≤2 | ||||||
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27 |
Rated operating voltage | Rated operating voltage(V)AC/DC |
V |
24* | 110 | 220 | |||
| Scope of normal operation voltage | Opening:65%-120% rated voltage, in case the voltage is lower than 30% rated voltage, opening operation is not allowed | ||||||||
| 28 | Rated voltage of energy storage motor | V | AC110/220, DC110/220 | ||||||
| 29 | Energy storage time | S | ≤15 | ||||||
Contact Person: Antonio
Tel: +8613607680651
