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Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection

    Buy cheap Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection from wholesalers
     
    Buy cheap Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection from wholesalers
    • Buy cheap Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection from wholesalers

    Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection

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    Brand Name : Tianan Electric
    Model Number : LW8-40.5
    Certification : ISO9001-2000
    Price : Pending
    Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram
    Supply Ability : 14000 PCS/year
    Delivery Time : 35 work days
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    Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection

    Outdoor SF6 High Voltage Circuit Breaker AC 50Hz LW8-40.5


    1.General


    1.1 LW8-40.5 Outdoor HV SF6 circuit breaker is an outdoor HV electrical equipment of three-phase, AC, 50Hz and it's suitable for control and protection of power transmission and distribution system, it also can be used to tie circuit breaker and break/make capacitor bank, and also can attach circuit breaker in it for measurement and protection.

    1.2 LW8-40.5 Outdoor HV SF6 circuit breaker adopts CT14 spring operation mechanism.

    1.3 The circuit breaker meets the requirements of national standard : GB1984-89 AC High-Voltage Circuit breakers, and IEC56 AC High-Voltage Circuit breakers.

    1.4 Main features of the Circuit breaker


    a. Good breaking performance, short-time arcing time,
    long electrical duration and with the ability of continuous breaking of 16 times under the rated voltage without change of SF6.
    b. Reliable insulation, to be up to 40.5Kv/10min at gas pressure of zero point of meter.
    c. High mechanical reliability, High making ability, frequent operation is available.
    d. Without return while closing and opening capacitor bank of 400A.
    e. Cut off long line of 25.50km and has no re-burn.
    f. Simple structure, small size, long free time is no need to overhaul.

    1.5. Application environment

    a. Altitude to be not more than 1000m
    b. Ambient temperature: -30ºC - + 40ºC, the average value of 24H to be not more than 35ºC;
    c. Relative humidity: the daily average value to be not more than 95%, monthly average value to be not more than 90%,
    d. Speed of wind: not more than 35km/s
    e. Contamination condition to be III grade, porcelain bushing creepage distance shall be 1050 mm (nominal creepage ratio to be not less than 25mm/kV);
    f. The ambient air should be free of the flammable material, explosive danger, chemical corrosive and intensive shake.

    2. Main technical parameters

    2.1 LW8-40.5 Circuit breaker main technical parameters to see table 1.
    2.2 Assembly and adjustment parameters of circuit breaker to see table 2.

    Table 1

    No.ItemUnitParameter
    1Rated voltagekV40.5
    2Rated insulation level1min power frequency withstand voltagekV185/215(fracture)
    Lightning impulse withstand voltage95/118(fracture)
    3Rated currentA2000
    4Mechanical endurancetime5000
    5Rated pressure of SF6 gas(20ºC meter pressure)Mpa0.45
    6Locking pressure (20ºC meter pressure)Mpa0.40
    7Lowest ambient temperatureºC-30
    8Rated short-circuit breaking currentkA31.5
    9Rated short-circuit making current(peak)kA80
    10Rated short time withstand current(thermal current)kA31.5
    11Rated peak withstand current(dynamic current)kA80
    12Rated out-of-phase breaking currentkA7.9
    13Breaking times of the rated short-circuit breaking current:time16
    14Close times≤0.1
    15Open times≤0.06
    16Rated operation sequence
    O-0.3s-CO-180s-CO
    17Rated breaking/opening current of single capacitor groupA400
    18Last time of short circuit currents4
    19SF6 leakage rate (yearly)
    ≤1
    20Moisture Content of SF6 gas(20ºC)Ppm(v/v)≤150
    21Rated operating voltage of spring operation mechanism

    Voltage of closing and opening coilVAC 220, 380
    DC:48, 110 , 220
    Voltage of energy storage motorVAC 220
    DC 220
    22Weight of SF6 gaskg8
    23Weight of circuit breaker (including operation mechanism)kg1400


    Table 2

    No.ItemUnitTechnical RequirementsTest conditions and methods
    1Travel of movable contactmm95±2Measurement of movable contact travel refer to darawing12
    2Clearance between contactsmm605±1.5Measurement of Clearance between movable and fixed contact refer to drawing 12a
    3Three-phase switch-on asynchronyms≤3Measurement of pole distance difference between movable and fixed contact refer to darawing14
    4Three-phase switch-off asynchronyms≤2Measurement of pole distance difference between movable and fixed contact refer to drawing 15
    5Resistance of main loopμΩ≤120Measurement to DC voltage drop method, put in 100A
    6Speed at instant of contacts touchingm/s3.2±0.2Rated voltage and measurement method refer to drawing 14
    7Speed at instant of contacts disconnectingm/s3.4±0.2Rated voltage and measurement method refer to the drawing 15
    8Cuisine stroke of makingmm10+0.5 -0.1Refer to drawing 6 under the closing status
    9positioning gap of Cuisine stroke of makingmm1-2Refer to drawing 6 under the closing status
    10Partial charging
    40.5kV
    25.7kV
    PC20At rated gas pressure, use partial instrument to put 40.5kV between two outgoing wires for 1min, then drop to 25.7kV equably
    PC10

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