Knkong Electric Co.,Ltd
| Payment Terms | L/C, T/T, Western Union |
| Supply Ability | 1000 Unit per month |
| Delivery Time | 15 working days |
| Packaging Details | Standard export packaging |
| Working Voltage | 12KV |
| Working Current | 2000A |
| Breaking current | 25KA |
| Type | withdrawable |
| Original | Zhengzhou, CHINA |
| Manufactory | KNKONG-ELECTRIC |
| Brand Name | KNKONG |
| Model Number | VS1-12 |
| Certification | CB,ISO,IEC |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T, Western Union | Supply Ability | 1000 Unit per month |
| Delivery Time | 15 working days | Packaging Details | Standard export packaging |
| Working Voltage | 12KV | Working Current | 2000A |
| Breaking current | 25KA | Type | withdrawable |
| Original | Zhengzhou, CHINA | Manufactory | KNKONG-ELECTRIC |
| Brand Name | KNKONG | Model Number | VS1-12 |
| Certification | CB,ISO,IEC | Place of Origin | China |
| High Light | 12KV Sealed Pole VCB Circuit Breaker ，VCB Circuit Breaker 25KA ，Explosion Proof VCB Circuit Breaker | ||
Solid sealed pole vacuum circuit breaker 12KV for indoor electric panel
Voltage: 12-24KV
Current: Max 2000A
Breaking current: 20KA
Type: withdrawable/Fixed
Product overview
Vacuum circuit breaker: It is a new type of high-voltage circuit breaker developed in the 1960s (for example, the picture at the beginning of this article is ZN28-12 indoor high-voltage vacuum circuit breaker), which uses vacuum to extinguish arcs. Its advantages are small size, light weight, fast action, fireproof and explosion-proof, low noise and so on. At present, there is a trend to replace other circuit breakers, mainly used in substations below 35KV and places requiring frequent operations in industrial and mining enterprises.
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 | ||||||
Company Details
Business Type:
Manufacturer
Year Established:
2012
Total Annual:
1000000-9000000
Employee Number:
50~100
Ecer Certification：
Active Member
Knkong Electric Co., Ltd (Zhengzhou Knkong Mechanical And Electrical Co., Ltd)was established in 2012. A wholly-owned subsidiary of Henan Sanhe Electric Group. We are mainly responsible for overseas market exporting, electronic components, and technology import. Relying on a h... Knkong Electric Co., Ltd (Zhengzhou Knkong Mechanical And Electrical Co., Ltd)was established in 2012. A wholly-owned subsidiary of Henan Sanhe Electric Group. We are mainly responsible for overseas market exporting, electronic components, and technology import. Relying on a h...
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