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  • Product description and use method:

    FN7-12 series indoor high voltage load switch and fuse combination

    I. Overview

    FN7-12DR AC high-voltage load switch is a new type of indoor gas-generating high-voltage load switch. It is suitable for AC 50HZ three-phase AC power system with a rated voltage of 12KV. It is used to interrupt the load current and close the short-circuit current.


    Model


    Third, the use of environmental conditions

    Normal use conditions:
    * Ambient air temperature
    Upper limit: + 40 ° C,
    Lower limit: 10 ℃ in general area, -25 ℃ in high cold area.
    * Altitude is 1000 and below.
    * Relative humidity: daily average is not greater than 95%, monthly average is not greater than 90%;
    * The surrounding air should not be obviously polluted by corrosive or flammable gases and water vapor;
    * No repetitive severe vibration


    Fourth, the main technical parameters

    Rated voltage ( KV )

    Insulation level

    Rated current ( A )

    有效值4sRated thermal stable current ( KA effective value 4s )

    有效值) Rated dynamic and stable current ( KA effective value)

    峰值) Rated short-circuit closing current ( KA peak)

    耐压一分钟( KV有效值) Power frequency 50HZ withstand voltage for one minute ( KV effective value)

    有效值) Lightning impulse withstand voltage ( KV effective value)

    400

    12.5

    31.5

    31.5

    12

    Phase to phase, relative 42

    Phase to phase, phase to ground 48

    630

    20

    50

    50

    Isolation fracture 48

    Isolation fracture 85


    Five, external installation dimensions

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