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    35kV Vacuum Circuit Breaker

    Good price vacuum circuit breaker with 35kv rated voltage for sale online. Rated current is 630A, 1250A, 1600A, 3150A. Over voltage protection is vacuum circuit breaker function. VCB breaker parts with high quality material, you can buy with satisfaction, use at ease.
    SKU: ATO-VCB-35
    Delivery date: 6-12 days

    Indoor vacuum circuit breaker with 35kv rated voltage. Vacuum circuit breaker uses convenient, mechanical life about 20000 times. VCB breaker is applicable in occasions with frequent operations, acting to protect and control line.


    • Vacuum circuit breaker with 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.
    • VCB circuit breaker with few components and parts, compact and logical structure, assuring more reliable and safer operation.
    • Compact design enables the breaker to be installed within almost all switchgears.
    • Superior cost performance, vcb breaker is the ideal choice for engineering programs.

    Parameter List: (Parameters can be customized)

    Model ATO-VCB-35
    Rated voltage 35 kV
    Maximum operating voltage 12 kV
    Rated current 630 A, 1000 A, 1250 A, 1600 A, 2000 A, 3150 A
    Rated short circuit breaking current 20/25 kA, 31 kA, 40 kA, 50 kA
    Rated short circuit switching current 50/63 kA, 80 kA, 100 kA, 125 kA
    Rated peak withstand current 50/63 kA, 80 kA, 100 kA, 125 kA
    4S Rated short-time withstand current 20 kA, 31 kA, 40 kA, 50 kA
    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
    Contactor torque 11±1
    Exceed range(the compress length of contact spring) 4±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
    Weight 350 kg
    Certification CE
    Warranty 12 months

    Dimensions: (Unit: mm)

    Vacuum circuit breaker inside constructionVacuum circuit breaker external construction

    Schematic Diagram:

    Vacuum circuit breaker schematic diagram

    Tips: VCB Working Principle

    When the circuit breaks due to any reason, the moving contacts move away from the fixed contact and this produces an arc between the contacts.

    When the contacts separate, they release metallic vapor that fills in the space. The vapors have positive ions from the contacts' materials. The vapors help in the elimination of the arc. The rate of vapor release depends upon the rate of current. When the current starts to decrease, the level of vapors also decreases. Gradually the current decreases to zero, and so does the rate of vapors. This causes the medium to recover its dielectric strength.

    When the current voltage is high, the arc is condensed in a small region. This leads to swift vaporization of the surface. Interruption is possible when the arc is in the diffusion phase. After the arc finally breaks, the dielectric strength increases rapidly.

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