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| Categories | VCB Circuit Breaker |
|---|---|
| Brand Name: | KNKONG |
| Model Number: | VS1-12 |
| Certification: | CB,ISO,IEC |
| Place of Origin: | China |
| MOQ: | 1 |
| Price: | USD 1000-2000 Each |
| Payment Terms: | L/C, T/T, Western Union |
| Supply Ability: | 1000 Unit per month |
| Delivery Time: | 15 working days |
| Packaging Details: | Standard export packaging |
| Voltage: | 12KV |
| Current: | 1250A |
| Breaking current: | 25KA |
| Type: | withdrawable |
| Original: | China |
| Manufactory: | KNKONG |
| Company Info. |
| Knkong Electric Co.,Ltd |
| View Contact Details |
| Product List |
VCB 12KV 1250A VS1 Series Vacuum Circuit Breaker
Voltage: 12KV
Current: 1250A
Breaking current: 25KA
Type: withdrawable
Product overview
VS1-Series embedded pole. vacuum circuit breakers are applicable to 12kV, three-phase AC 50Hz indoor switchgear and can serve as protection and control units for industrial and mining establishment transformer substation equipment. With modular and independent-frame design for their spring operating mechanisms, VS1-Series circuit breakers can operate with KYN28-12(24) mid-set and fixed switchgear. These circuit breakers are subject to both fixed installation and assembly with the truck as a handcart unit
Applicable standards
1EC62271-100 High-voltage switchgear and control-gear-Part 100: Alternating-current circuit-breakers
Secondary circuit
VS1-Series vacuum circuit breakers adopt modular designs for their secondary control circuit boards. The electric connection of the mechanisms employs high-grade self-fastener plugs, which both facilitates replacement and ensures reliable electrical connection
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) | |||||
| Lighting impulse withstand voltage (peak) | 75(phase-to-phase, phase-to-earth) 85(across the isolating distance) | ||||||||
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 | ≤2 | ||||||
| 20 | Bounce duration of contact closing | ≤2 | |||||||
| 21 | Average breaking speed (instant breaking 6mm) | m/s | 1.1±0.2 | ||||||
| 22 | Average making speed | 0.8±0.2 | |||||||
| 23 | Making time | ms | ≤100 | ||||||
| 24 | Breaking time | ≤50 | |||||||
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 | ||||||
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 | ||||||
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