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    12kV Vacuum Circuit Breaker, 50Hz, 630A

    5 out of 5 based on 2 reviews | Write a review
    Economical price vacuum circuit breaker with 12kv rated voltage. Vacuum circuit breaker voltage range is 11kv to 40kv. 12kv vacuum circuit breaker has particular advantages for use in networks where there is a high switching frequency in the working current range.
    SKU: ATO-VCB-12B
    30-day Returns
    Delivery date: 6-12 days

    12kv vacuum circuit breaker for sale online, it is suitable for indoor use. Rated current is 630A, 1250A, 2000A, 2500A. VCB circuit breaker adopts the modular spring operating mechanism, with simple structure and stable performance.


    • Ultra-low-resistance type vacuum interruption meets the requirements of temperature rise of large current type, and lowers the energy loss.
    • Ideal contact material and shape, ensuring low current carrying value and stable contact resistance.
    • Integrated design of main conductive circuit made of compound isolation material and operating mechanism.
    • 12kV vcb with few components and parts, compact and logical structure, assuring more reliable and safer operation.
    • 12kV vacuum circuit breaker adopts the composite insulation structure, with high insulation level,no pollution or explosion danger.
    • Compact design enables the breaker to be installed within almost all switchgears.
    • Superior cost performance, vacuum circuit breaker is the ideal choice for engineering programs.

    Specification: (Parameters can be customized)

    Model ATO-VS1-12 (ZN63A-12)
    Rated voltage 12 kV
    Maximum operating voltage 12 kV
    Rated current 630A/1000A/1250A 1250A/1600A/2000A/2500A 1250A/1600A/2000A/3150A 2000A/2500A/3150A
    Rated short circuit breaking current 20kA/25kA 31.5kA 40kA 50kA
    Rated short circuit closing current 50kA/63kA 80kA 100kA 125kA
    Rated peak withstand current 50kA/63kA 80kA 100kA 125kA
    4S Rated short-time withstand current 20kA/25kA 31.5kA 40kA 50kA
    Rated insulation level power frequency withstand voltage(rated open circuit before and later): 42 kV
    impulse withstand voltage(rated open circuit before and later): 75 kV
    Mechanical life 20000 times
    Rated closing voltage of operating mechanism (DC) 110 V, 220 V
    Rated switching voltage of operating mechanism (DC) 110 V, 220 V
    Operating Frequency 50Hz/60Hz
    Contactor torque 11±1
    Exceed range(the compress length of contact spring) 3±0.5
    Max.bouncing duration ≤ 2
    Average opening speed ≤ 0.05
    Average closing speed ≤ 0.08
    Opening time ≤ 50
    Closing time ≤ 100
    Accumulative allowable wear thickness of dynamic and static contacts  3 mm
    Certification CE
    Warranty 12 months

    Dimensions: (Unit: mm) (Contact us for detailed dimensions)

    VS1 12

    Schematic Diagram:

    Vacuum circuit breaker schematic diagram


    12 KV Vacuum Circuit Breaker Details

    Tips: What are the reasons for choosing ATO vacuum circuit breaker?

    • ATO 12kV vacuum circuit creaker has the reliable interlocking function. Designed into fore and rear separate structure, it is used as the unit for fixed installation, in addition, it can be assembled with the chassis, as the individual handcart.
    • Employing the mature APG technique and advanced epoxy-resin solid encapsulation technology, the vacuum arc-extinguishing chamber, main conductive circuit, insulating support, etc. are combined organically to form a integrated solid-encapsulated pole, the surface of vacuum arc-extinguishing chamber is not affected with the environment, so as to really realize the maintenance free.
    Existing reviews of 12kV Vacuum Circuit Breaker, 50Hz, 630A
    Works very well
    I was impressed in this vacuum circuit when I was look at this picture. I received this one one month and 12kV vacuum circuit works very well. Superior cost performance, is the ideal choice for engineering programs. Highly recommend!!
    From: Enon | Date: 02/06/2022
    Was this review helpful? Yes No (0/0)
    Solid vacuum circuit breaker
    I was very happy to receive the vacuum circuit breaker in the expected time. Compact design and superior cost performance with this product. Definitely recommend!! I would purchase this product again.
    From: Dehn | Date: 18/04/2022
    Was this review helpful? Yes No (0/0)
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