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12KV Withdrawable Vacuum Circuit Breaker Modularized Mechanism

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12KV Withdrawable Vacuum Circuit Breaker Modularized Mechanism

12KV Withdrawable Vacuum Circuit Breaker Modularized Mechanism
12KV Withdrawable Vacuum Circuit Breaker Modularized Mechanism

Large Image :  12KV Withdrawable Vacuum Circuit Breaker Modularized Mechanism

Product Details:
Place of Origin: China
Brand Name: KNKONG
Certification: CB,ISO,IEC
Model Number: VS1-12
Payment & Shipping Terms:
Minimum Order Quantity: 1
Packaging Details: Standard export packaging
Delivery Time: 15 working days
Payment Terms: L/C, T/T, Western Union
Supply Ability: 1000 Unit per month

12KV Withdrawable Vacuum Circuit Breaker Modularized Mechanism

Normal Voltage: 12KV Normal Current: 630-2000A
Breaking Current: 20-25KA Type: Withdrawable
Original: China Manufactory: KNKONG-ELECTRIC
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Withdrawable Vacuum Circuit Breaker


12KV Vacuum Circuit Breaker


25KA Modularized Vacuum Circuit Breaker

VS1 12KV withdrawable vaccum circuit breaker modularized mechanism

Voltage: 12KV

Current: 630-2000A

Breaking current: 20KA

Type: withdrawable



Product overview

VS1 series circuit breakers are completely independently developed by Knkong. The modular mechanism makes installation, maintenance, testing and operation easier. Compared with traditional circuit breakers, it has more stable operation, higher safety and longer service life. It can meet the application needs of customers in 12kV and 24kV power transmission and distribution systems and is widely used in electric power, energy, petrochemical, metallurgy, manufacturing, transportation, construction, environmental protection and other industries.


Normal service condition

Altitude ≤1000m
Ambient temperature Max +40℃
Min -15℃

Ambient humidity:

Maximum average humidity

24 hours ≤95%
1 month ≤90%
Maximum water vapor pressure 24 hours ≤2.2kpa
1 month ≤1.8kpa


Special service condition

For special operating conditions, please consult the manufacturer:
The site elevation does not exceed 1000m
Allows to reduce the dielectric strength of air
Reduce current carrying capacity
Provide additional ventilation for heat dissipation
Other precautions should be negotiated with the manufacturer according to section 2.2 of IEC 62271-1


Technical Parameters

No. Item Unit Parameter
1 Rated voltage KV 12
2 Rated frequency Hz 50/60


Rated insulation level

1min power frequency withstand voltage(r. m. s)



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)






Rated current




630 630 1250 1600
1250 1250 1600 2000
    2000 2500
    2500 3150
5 Rated short-circuit breaking current



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



14 Rated back-to-back capacitor bank breaking current 400
15 Double-earth fault breaking current 27.4
16 Allowable maximum contact erosion



17 Clearance between open contacts 10±1
18 Over stroke 3.5±0.5
19 Non-simultaneity of 3-phase opening and closing



20 Bounce duration of contact closing ≤2
21 Average breaking speed (instant breaking 6mm)



22 Average making speed 0.8±0.2
23 Making time



24 Breaking time ≤50





Resistance of each phase main circuit


μ Ω

630A ≤50
1250A ≤45
1600A~2000A ≤35
≥2500A ≤25
26 Contact breaking bounce amplitude mm ≤2



Rated operating voltage Rated operating voltage(V)AC/DC



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 Details
Knkong Electric Co.,Ltd

Contact Person: Antonio

Tel: +8613607680651

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