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Vacuum Circuit Breaker(VCB)12KV 24KV 36KV ZN-85-40.5 indoor vacuum circuit breaker

ZN-85-40.5 (modular type) indoor vacuum circuit breaker

suitable for indoor high voltage equipment with rated voltage of 40.5kV and three-phase AC 50Hz. It can be used as industrial and mining enterprises, power plants and substations as load current, overload current and short circuit. For current use, it is suitable for frequent operation.


Can be use in KYN61-40.5 type of metal clad switchgear.

    Product Description

    ZN-85-40.5 indoor vacuum circuit breakerProduct Description

    Overview :

    ZN-85-40.5 (modular type) indoor vacuum circuit breaker is suitable for indoor high voltage equipment with rated voltage of 40.5kV and three-phase AC 50Hz. It can be used as industrial and mining enterprises, power plants and substations as load current, overload current and short circuit. For current use, it is suitable for frequent operation.

    Can be use in KYN61-40.5 type of metal clad medium voltage switchgear assemblies.

     

    Environmental conditions:

    1. Altitude: the altitude does not exceed 2000m;

    2. Ambient temperature: no higher than +40℃, not lower than -25℃;

    3. Relative humidity: the daily average does not exceed 95%, and the monthly average does not exceed 90%;

    4. Earthquake intensity: no more than 8 degrees;

    5. Locations without fire, explosion hazard, serious contamination, chemical corrosion and severe vibration.

     

    Structural features:

    1. The circuit breaker adopts the arc extinguishing chamber on the upper part, and the structure of the whole structure under the mechanism is favorable for debugging;

    2. It adopts composite insulation structure of air and organic materials, which is compact in design and light in weight;

    3. It can be equipped with the vacuum interrupter of Cutler-Hammer Company of the United States and the domestic ZMD vacuum interrupter. The two arc extinguishing chambers adopt the longitudinal magnetic field arc extinguishing, low interception and good asymmetric breaking performance.

    4. Simple spring operating mechanism, 10,000 operations free of maintenance.

    5. Screw drive mechanism, labor-saving, stable, self-locking performance.

     

    The main technical parameters

    Name

    Unit

    Value

    Rated voltage

    KV

    40.5

    1min power frequency withstand voltage (effective value)

    KV

    95

    Lightning impulse withstand voltage (effective value)

    KV

    185

    Rated frequency

    Hz

    50

    Rated current

    A

    1250,1600,2000

    Rated short-time withstand current

    KA

    25,31.5

    Rated peak withstand current

    KA

    63,80

    Rated short circuit duration

    S

    4

    Rated short-circuit breaking current

    KA

    25,31.5

    Rated short circuit closing current

    KA

    63,80

    Rated operation sequence

     

    0-0.3s-Co-180s-Co

    Break time

    ms

    <80

    Rated short-circuit breaking current breaking times

    time

    20

    Single capacitor bank breaking current

    A

    630

    Back-to-back capacitor bank breaking current

    A

    400

    Rated operating voltage

    V

    ~110/-110,~220/-220

    Mechanical life

    time

    10000