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    ZW43-12 Type Outdoor HV AC Vacuum Circuit Breaker
    ZW43-12 type outdoor HV AC vacuum circuit breaker is used to make and break load current, overload current and short-circuit current in the power system with rated voltage 12kV, three-phase AC 50/60Hz. The product is composed of a circuit breaker and a spring operating mechanism. It is applicable to substations, industrial and mining enterprises, unban and rural electric power networks, especially to those serious pollution environment and frequent operation places for power network control and equipment protection. The product conforms to the standards of IEC62271-100 & GB1984: AC high voltage circuit breaker, IEC60694 & GB/T11022: HV general technical requirement of switch and control apparatus.
    Ambient conditions
    1. Altitude: ≤2000m;
    2. Ambient temperature: -40℃~+45℃;diurnal temperature rang ≤25℃;
    3. Wind speed: ≤35m/s, equivalent to wind pressure of 700Pa;
    4. Earthquake intensity: ≤grade 8;
    5. Relative humidity: monthly average ≤90%; daily average ≤95%;
    6. Ice thickness: ≤10mm
    7. Sunlight intensity: ≤1000W/m2
    8. Pollution degree: ≤Ⅳ(GB5582);
    9. Applicable occasions: no fire and explosion danger, no chemical corrosion and no frequent severe vibration.

    Technical specification
    No. Item Unit Data
    1 Rated voltage kV 12
    2 Rated current A 630
    3 Rated frequency Hz 50/60
    4 Rated short-circuit breaking current kA 20
    5 Rated short-time withstand current(4s) 20
    6 Rated peak withstand current(peak) 50
    7 Rated short-circuit making current(peak) 50
    8 1min P.F withstand volage Wet test kV 34
    Phase to phase,phase to earth 42
    Across open contacts 48
    9 Lightning impulse withstand
    Phase to phase,phase to earth kV 75
    Across open contacts 85
    10 1min P.F withstand voltage for secondary loop kV 2
    11 Breaking times of rated current times 1000
    12 Breaking times of rated short-circuit current 30
    13 Mechnical life 10000
    14 Opening speed m/s 1.2±0.2
    15 Closing speed 0.6±0.2
    16 Closing time ms 25~60
    17 Opening time 18~45
    18 Contact close-bouncing time ≤2
    19 Rated power for energy storage motor W 40
    20 Three-phase opening/closing non-simultaneity ms ≤2
    21 Resistance for each phase
    conductive loop
    Switch body μΩ ≤80
    Disconnect blade Single side≤120、double sides≤200
    22 Phase-to-phase spacing mm 280±1.5
    23 Net weight kg 125(single isolator)、150(double isolator)

    Main function features
    1. The performance of the product is stable and reliable as the product adopts three-pillar type structure, and the vacuum arc-extinguishing chamber connects with the operating mechanism through insulation pulling rod;
    2. Arc-extinguishing chamber, main conducting loop and insulation support are casted into an organic whole by epoxy resin with APG technology, and encapsulated with silicon rubber, it is provided with good anti-condensation performance and mechanical strength.
    3. The switch adopts a high performance spring operating mechanism with the advantages of simple structure and long mechanical life, and with the functions of manual/electric energy storage and opening/closing operation.
    4. An integrated isolation switch is optional for the product.
    5. The product has the advantages of small size, novel appearance, light weight and easy installation.
    6. The switch can be equipped with control terminal interface to apply to automation distributiong networks and the unattended substations.
    Outline and installation dimension
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