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SF6 LW8-40.5 2000-31.5 outdoor circuit breaker 40.5KV

LW8-40.05 series outdoor high voltage sulfur hexafluoride circuit breaker is a kind of high voltage electrical equipment with SF6 gas as the extinguishing medium, installed outdoors, three-phase AC 50Hz and rated voltage 35kV. They are mainly used for switching and breaking rated current and fault current, switching and breaking vessel groups, and can be used for frequent operations in transmission circuits. In addition, they can be used as disconnect circuit breakers to achieve control and protection of transmission and distribution lines.

    The circuit breaker is equipped with CTI4 spring operating mechanism. Each circuit breaker can be equipped with 6-12 sets of bushing-type CT.

    Operating condition

    Temperature :-10℃~ + 40℃

    Relative humidity: the daily average relative humidity is not more than 95%; The average monthly relative humidity does not exceed 90%

    Earthquake intensity: not more than 8.

    Saturated vapor pressure: the daily average pressure does not exceed 2.2kPa, the monthly average pressure does not exceed 1.8Kpa

    Altitude :≤1000m(except for special circumstances)

    The device should be installed in a place without fire, explosion, serious dirt, chemical erosion, and violent vibration.

     

     

     

     

     

     

     

     

    Technical parameter

    Item

    Unit

    Data

    Rated voltage

     KV

     40.5

    Rated power frequency

     Hz

    50/60 

    Rated current

     A

     2000/1250/630

    Rated power frequency withstand voltage (1min) KV

     Isolating

    95

     To ground

    75

    Rated lightning impulse withstand voltage (1min) KV

     Isolating

    185

     To ground

    145

    Rated short-circuit breaking current

    KA 

     31.5/25

    Rated withstand current(peak)

    KA 

     80/63

    Rated short-time withstand current(3s)

    KA 

     31.5/25

    Rated short-circuit making current(peak)

    KA 

     80/63

    Phase to phase spacing

    mm

    745

    Moving contactor travel

    mm

    95

    Moving contactor overtravel

    mm

    25

    Opening time

    ms

    60

    Closing time

    ms

    150

    Trip time

    ms

    40

    Rated out-of-phase breaking current

    KA

    6.3

    Grounding fault breaking capability

    KA

    27.4

    Rated operation sequence

     

    O-0.3s-CO-180s-CO

    Main circuit resistance

    μΩ

    ≤50

    Rated SF6 gas pressure(20℃)

    Mpa

    0.45

    Rated minimum SF6 gas pressure(20℃)

    Mpa

    0.4

    SF6 gas leakage rate(yearly)

    Mpa

    ≤0.5%

    Gas moisture content

    ppm

    ≤150

    Mechanism life

     times

     10000

    Radio interference

     μV

     <500

    Creepage distance

     mm

    1255

    Heating and lighting voltage

     V

     220ACV

    Control system voltage

    V

    220DCV/ACV

    Mass of filled SF6 gas

     Kg

    8

    Mass of equipment

    Kg

    1400

    Dimension  W*D*H

    mm

    2740*1280*2600