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Vacuum Circuit Breaker(VCB)12KV 24KV 36KV Side-mounted VCB

BKV3 (VS1)- 12 side-mounted vacuum circuit breaker is an indoor high-voltage switchgear for three-phase power system with rated voltage of 12 kV and frequency of 50 Hz. It is used as protection and control electric appliance due to special vacuum circuit breaker. Superiority, especially suitable for frequent operations requiring rated current or multiple short-circuit currents.

The BKV3(VS1)-12 type side-mounted vacuum circuit breaker is fixedly mounted and is mainly used for fixed switchgear. The circuit breaker can be used alone or in ring power supply, box type or various non-standard power supply. system.

    VS1-Series vacuum circuit breakers

     

    Environmental conditions:

    1. Altitude: the altitude does not exceed 1000m;
    2. Ambient temperature: no higher than +40℃, not lower than -25℃;
    3. Relative humidity: the daily average does not exceed 95%, and the monthly average does not exceed 90%;
    4. Earthquake intensity: no more than 8 degrees;
    5. Locations without fire, explosion hazard, serious contamination, chemical corrosion and severe vibration

     

    The main technical parameters: 

    NO

    Item

    Units

    Technical parameters

    1

    Rated voltage

    kV

    12

    2

    Maximum working voltage

    kV

    12

    3

    Rated current

    A

    630/1250

    630/1250

    630/1250

    4

    Rated short-circuit breaking current

    kA

    20

    25

    31.5

    5

    Rated short circuit closing current

    kA

    50

    63

    80

    6

    Rated peak withstand current

    kA

    50

    63

    80

    7

    4S rated short circuit withstand current

    kA

    20

    25

    31.5

    8

     

    Rated insulation level

    Power frequency withstand voltage (before and after rated breaking)

    kV

    42(Fracture:48)

     

     

    Impact withstand voltage (before and after rated breaking)

     

    75(Fracture:84)

    9

    Rated operation sequence

     

                          0-0.3s-Co-180s-Co

    10

    Mechanical life

    times

    10000

    11

    Rated short circuit current breaking times

    times

    50

    12

    Operating mechanism rated closing voltage (DC)

    V

    110,220

    13

    Operating mechanism rated trip current (DC)

    V

    110,200

    14

    Contact stroke

    mm

    11±1

    15

    Overtravel (contact spring compression length)

    mm

    3.5±0.5

    16

    Three-phase split and close bounce time

    ms

    ≤2

    17

    Contact closing bounce time

    ms

    ≤2

    18

    Average opening speed

    m/s

    1.2±0.2

    19

    Average closing speed

    m/s

    0.6±0.2

    20

    Opening time

    At the highest operating voltage

    s

    ≤0.05

     

     

    At the lowest operating voltage

     

    ≤0.08

    21

    Closing time

    S

    0.1

    22

    Main loop resistance of each phase

    μΩ

    60

    50

    23

    Dynamic and static contacts allow wear cumulative thickness

    mm

    3