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VS1-12 3 Phase VCB Vacuum Circuit Breaker 40KA AC 50/60Hz

China Knkong Electric Co.,Ltd certification
China Knkong Electric Co.,Ltd certification
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VS1-12 3 Phase VCB Vacuum Circuit Breaker 40KA AC 50/60Hz

VS1-12 3 Phase VCB Vacuum Circuit Breaker 40KA AC 50/60Hz
VS1-12 3 Phase VCB Vacuum Circuit Breaker 40KA AC 50/60Hz

Large Image :  VS1-12 3 Phase VCB Vacuum Circuit Breaker 40KA AC 50/60Hz

Product Details:
Place of Origin: China
Brand Name: Knkong
Certification: CCC,ISO9001,CE, CB,IEC60898
Model Number: VS1-12
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: USD 1000-3000
Packaging Details: Standard export packaging
Delivery Time: 15 working days
Payment Terms: L/C, T/T
Supply Ability: 500 unit per month

VS1-12 3 Phase VCB Vacuum Circuit Breaker 40KA AC 50/60Hz

Manufactory: KNKONG Voltage: 12KV
Current: 20KA/25KA/31.5KA/40KA Type: Vacuum
Poles: 3 Standards: ISO9001:2015,CCC,ISO9001,CE, CB,IEC60898
High Light:

VCB Vacuum Circuit Breaker


VS1-12 3 Phase VCB


VCB Vacuum Circuit Breaker 40KA

Vacuum Circuit Breaker VCB 12kv,3-phase AC 50/60Hz VS1-12 series


Product Introduction


"High-voltage vacuum circuit breaker" is named because its arc extinguishing medium and the insulating medium in the contact gap after arc extinguishing are both vacua; vacuum circuit breakers are small in size, light in weight, suitable for frequent operation, and arc extinguishing without maintenance. Advantages, it is more popular in the distribution network.

VS1-Series VCB  vacuum circuit breakers are applicable 3-12kV, 3-phase AC 50/60Hz indoor switchgear and can serve as protection and control units for industrial and mining establishment transformer substation equipment. With the modular and independent-frame design for their spring operating mechanisms, VS1 circuit breakers can operate with KYN28 mid-set and fixed switchgear. These circuit breakers are subject to both fixed installation and assembly with the truck as a handcart unit


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


VS1 Technical Parameters

No. Item Unit Parameter
1 Rated voltage KV 12/24
2 Rated frequency Hz 50


Rated insulation level

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




48(across the isolating distance)

Lighting impulse withstand voltage (peak)


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





The resistance of each phase main circuit



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



Responsibility: Production research and development MV& LV switch, outdoor&indoor VCB, power distribution terminals (DTU, FTU).

Year of establishing: 10th-June-2009

Registered capital:RMB102,000,000 (USD 15,000,000 )

Company License: 91410104689749184A

Manufacturing workshop area:20,000 square meters

Company nature:private enterprise

Number of Employees:180

Senior engineer:20-30

Annual sales volume on 2019:RMB200,000,000 (USD 26,000,000)

VS1-12 3 Phase VCB Vacuum Circuit Breaker 40KA AC 50/60Hz 0VS1-12 3 Phase VCB Vacuum Circuit Breaker 40KA AC 50/60Hz 1

Contact Details
Knkong Electric Co.,Ltd

Contact Person: Ken Chan (English)

Tel: 0086 13938551009

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