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BKZCR-12.png
BKZCR-12.png

BKZC(R)-12 Indoor vacuum contactor 12KV (Drawout)

BKZC(R)-12 Indoor vacuum contactor 12KV (Drawout)

Vacuum AC contactors utilize vacuum bottle encapsulated contacts to suppress the arc. This arc suppression allows the contacts to be much smaller and use less space than air break contacts at higher currents. As the contacts are encapsulated, vacuum contactors are used fairly extensively in dirty applications, such as mining.

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    Vacuum contactors are only applicable for use in AC systems. The AC arc generated upon opening of the contacts will self-extinguish at the zero-crossing of the current waveform, with the vacuum preventing a re-strike of the arc across the open contacts. Vacuum contactors are therefore very efficient at disrupting the energy of an electric arc and are used when relatively fast switching is required, as the maximum break time is determined by the periodicity of the AC waveform.

    Can be use in KYN28-12 medium voltage metal clad drawout type switchgear assemblies.

     

    Technical parameters:

    NO.

    Parameters

    Unit

    Value

    BKZC(R)-12-630/400/250

    BKZC(R)-12-630/400/250

    1

    Rated Voltage

    kV

    7.2

    12

    2

    Rated Current

    A

    630

    400

    250

    630

    400

    250

    3

    Rated closing current (rms)

    A

    6300

    4000

    2500

    6300

    4000

    2500

    4

    rated breaking current

    5040

    3200

    2500

    5040

    3200

    2500

    5

    4S thermal current

    6300

    4000

    2500

    6300

    4000

    2500

    6

    Limit breaking current

    6300

    4000

    2500

    6300

    4000

    2500

    7

    Power frequency withstand voltage

    kV

    32

    42

    8

    operating frequency

    Times/h

    300

    9

    Electric life time

    AC-3

    ×104 Times

    25

    AC-4

    10

    10

    Mechanical life

    30

    11

    Rated operating voltage

    V

    AC110/220

    12

    Closing coil pull current

    A

    ≤ DC6/3

    13

    Holding coil holding current

    D:DC0.32/0.16

    14

    Shunt trip coil current

    J:DC2.5/1.3

     

    NO.

    Parameters

    Unit

    Value

    BKZC(R)-12-630/400/250

    BKZC(R)-12-630/400/250

    1

    contact distance

    mm

    4.5+1.0/-0.5

    6+1.0-0.5

    2

    contact overtravel

    1.5±0.5

    3

    Average closing speed

    m/s

    0.1~0.25

    4

    Average opening speed

    0.3~0.6

    5

    3 Phase closing - opening period

    ms

    ≤ 2

    6

    Closing time / opening time

    ≤ 150/ ≤ 150

    7

    Each phase conductive loop resistance(20oC)

    Ω

    ≤ 250