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12KV Solid Sealed Pole VCB Circuit Breaker 25KA Explosion Proof

    Buy cheap 12KV Solid Sealed Pole VCB Circuit Breaker 25KA Explosion Proof from wholesalers
     
    Buy cheap 12KV Solid Sealed Pole VCB Circuit Breaker 25KA Explosion Proof from wholesalers
    • Buy cheap 12KV Solid Sealed Pole VCB Circuit Breaker 25KA Explosion Proof from wholesalers

    12KV Solid Sealed Pole VCB Circuit Breaker 25KA Explosion Proof

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    Brand Name : KNKONG
    Model Number : VS1-12
    Certification : CB,ISO,IEC
    Payment Terms : L/C, T/T, Western Union
    Supply Ability : 1000 Unit per month
    Delivery Time : 15 working days
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    12KV Solid Sealed Pole VCB Circuit Breaker 25KA Explosion Proof

    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.ItemUnitParameter
    1Rated voltageKV12
    2Rated frequencyHz50/60
    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

    63063012501600
    1250125016002000
    20002500
    25003150
    4000
    5Rated short-circuit breaking current

    KA

    202531.540
    6Rated short-time withstand current202531.540
    7Rated short-circuit marking current506380100
    8Rated peak withstand current506380100
    9Rated duration of short-circuits4
    10Rated operating sequenceO-0.3s-O/C-180s-O/C
    11Breaking times of rated short-circuit currentTimes30/20 times(40KA)
    12Mechanical enduranceOps20000
    13Rated single capacitor bank breaking current

    A

    630
    14Rated back-to-back capacitor bank breaking current400
    15Double-earth fault breaking current27.4
    16Allowable maximum contact erosion

    mm

    3
    17Clearance between open contacts10±1
    18Over stroke3.5±0.5
    19Non-simultaneity of 3-phase opening and closing

    ms


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

    m/s


    1.1±0.2
    22Average making speed0.8±0.2
    23Making time

    ms


    ≤100
    24Breaking time≤50

    25


    Resistance of each phase main circuit


    μ Ω

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

    27

    Rated operating voltageRated operating voltage(V)AC/DC

    V

    24*110220
    Scope of normal operation voltageOpening:65%-120% rated voltage, in case the voltage is lower than 30% rated voltage, opening operation is not allowed
    28Rated voltage of energy storage motorVAC110/220,DC110/220
    29Energy storage timeS≤15

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