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FKRN12-12 Indoor high voltage load switch

FKRN12A-12D compressed air load switch, FKRN12A-12D series compressed air load switch-fuse combination electrical appliances, are suitable for 12KV and below three-phase distribution systems, as the control and protection of power equipment such as transformers, cables, overhead lines, etc.; especially suitable for terminal substations and box-type substations in urban and rural networks. And suitable for the control and protection of ring networks and double-radiation power supply units.

FKN12A-12D series compressed air load switches can disconnect and connect load current and overload current.

FKRN12A-12D series compressed air load switch-fuse combination appliances can separate and connect load current, overload current, and break line short-circuit current.

    Model and meaning

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    Normal use environment

    ◆Ambient air temperature upper limit: +40℃ lower limit -25℃

    ◆Altitude not exceeding 1000m;

    ◆The daily average relative humidity is not more than 95%, and the monthly average is not more than 90%.

    ◆The earthquake intensity does not exceed 8 degrees;

    ◆A place without fire, explosion hazard, chemical corrosion and severe vibration;

    ◆Filth level:Ⅱ 

    Main Features

    ◆The load switch, grounding switch, fuse and mechanism are on one frame, which can be flexibly combined, with compact structure, small size and convenient installation;

    ◆The fracture is arranged in direct action, with high dynamic and thermal stability current parameters, and the operation can be completed in one go;

    ◆With the static contact insulation cover, the ring network cabinet is isolated in structure, eliminating the interphase insulation partition and the break insulation plug board, which can prevent arc short circuit accidents in the cabinet;

    ◆With a unique valve structure, after the load switch is opened, the valve automatically isolates the break, with good protection performance;

    ◆There is a reliable mechanical locking device between the load switch, grounding switch and fuse to meet the "five protection" requirements;

    ◆It has two modes: manual operation and electric operation with AC/DC dual-purpose operating power supply, which is convenient for realizing the "three remote" requirements of the power system.

    Technical Parameters

    Name

    Unit

    FKN12A-12D

    FKRN12A-12D

    Rated voltage

    kV

    12

    12

    Rated frequency

    Hz

    50

    50

    Rated current

    A

    630

    125

    Rated insulation level

    1 min power frequency withstand voltage

    To ground, between phases

    kV

    42

    42

    Isolation fracture

    48

    48

    Lightning impulse withstand voltage (peak value)

    To ground, between phases

    75

    75

    Isolation fracture

    85

    85

    Rated short-time withstand current

    Load switch

    kA

    20

    -

    Earthing switch

    20

    Rated short circuit duration

    Load switch

    s

    4

    -

    Earthing switch

    2

    Rated short-circuit making current (peak value)

    kA

    50

    -

    Rated breaking current

    Active load breaking current

    A

    630

    -

    Closed loop breaking current

    630

    -

    5% active load breaking current

    31.5

    -

    Cable charging current

    10

    -

    Breaking capacity of no-load transformer

    KVA

    1250

    Rated short-circuit breaking current (current limiting fuse)

    kA

    -

    31.5

    Rated transfer current

    A

    -

    1200

    Mechanical life

    Second-rate

    2000

    2000

    Impactor output energy

    J

    -

    1+0.5

    Table 1

    Name

    Unit

    Numeric

    Fracture distance

    mm

    ≥175

    Phase center distance

    mm

    210±2

    Air gap between phases

    mm

    ≥125

    journey

    mm

    210±4

    Overtravel

    mm

    ≥40

    Three-phase closing at different times

    ms

    ≤10

    Three-phase disconnection at different times

    ≤5

    Inherent opening time of shunt release

    ms

    40-65

    Main circuit resistance

    μΩ

    ≤130

    Table 2

    Installation Dimensions

    FKRN12-12 Indoor high voltage load switch(1).jpg