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FZN21-40.5 Indoor high voltage vacuum load switch

FZN21-40.5 high-voltage vacuum load switch and combined electrical appliances are suitable for three-phase AC 40.5kV, 50Hz power systems, or used in conjunction with power distribution equipment and ring network switch cabinets, combined AC power stations, etc. They are widely used in wind power generation, power network construction and renovation projects, industrial and mining enterprises, high-rise buildings and public facilities, etc. They can be used as ring network power supply units or terminal equipment to distribute, control and protect electric energy. The technical performance of this product complies with GB16926-1997 "AC High Voltage Load Switch-Fuse

The product has the advantages of large breaking capacity, safety and reliability, long electrical life, frequent operation, compact structure, small size, light weight, and basically no maintenance. It has the ability to break rated current, overload current, short-circuit current and prevent equipment from running in phase loss. The switch has a clearly visible isolation break, is equipped with a grounding switch with closing ability and an electric spring mechanism, and has remote control capabilities.

    Model and meaning

     FZN21-40.5 Indoor high voltage vacuum load switch(1).jpg

    Environmental conditions for use

    ◆The ambient air temperature does not exceed 40℃, and the average temperature measured within 24 hours does not exceed 35℃, and the lowest ambient air temperature is -25℃;

    ◆The influence of sunlight radiation can be ignored;

    ◆Altitude not exceeding 1000m;

    ◆The surrounding air is not obviously polluted by dust, smoke, corrosive, corrosive and/or flammable gases, steam or salt mist;

    ◆The daily average relative humidity shall not exceed 95%; the daily average water vapor pressure shall not exceed 22kPa; the average relative humidity of the lunar phase shall not exceed 90%; the monthly average water vapor pressure shall not exceed 1.8KPa;

    ◆Vibration or ground motion from outside the switchgear and control equipment is negligible;◆The amplitude of electromagnetic interference induced in the secondary system does not exceed 1.6kV.

    Technical Parameters

    Name

    Unit

    Combined electrical appliances

    Load switch

    Rated voltage

    kV

    40.5

    Rated frequency

    Hz

    50

    4s rated short-time withstand current

    kA

    16

    Rated current

    A

    50

    1250

    Rated active load breaking current

    kA

    /

    1250

    Rated closed-loop breaking current  Rated cable charging current

    kA

    /

    1250

    Rated peak withstand current

    kA

    /

    40

    Rated short-circuit breaking current

    kA

    20

    /

    Rated cable charging current

    kA

    /

    21

    1min power frequency withstand voltage (vacuum break, phase-to-phase, phase-to-ground/isolation break)

    kV

    95/110

    Lightning impulse withstand voltage (vacuum break, phase-to-phase, phase-to-ground/isolation break)

    kV

    185/215

    1min power frequency withstand voltage of control auxiliary circuit

    kV

    2

    Mechanical life

    Second-rate

    10000

    Allowable wear thickness of vacuum interrupter contact

    mm

    3

    Manual operating force

    N·M

    ≯250

    Installation Dimensions

    FZN21-40.5 Indoor high voltage vacuum load switch.1.jpg