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ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage

METALWORK MACHINERY (WUXI) CO.LTD
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    Buy cheap ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage from wholesalers
     
    Buy cheap ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage from wholesalers
    • Buy cheap ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage from wholesalers
    • Buy cheap ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage from wholesalers
    • Buy cheap ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage from wholesalers
    • Buy cheap ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage from wholesalers

    ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage

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    Brand Name : Metalwork
    Model Number : ZN28G-12
    Certification : CE, ISO, CCC
    Price : Negotiable
    Payment Terms : L/C, T/T
    Supply Ability : 100 sets per month
    Delivery Time : 20 days
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    ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage

    ZN28G-12 Indoor High-voltage Vacuum Circuit Breaker

    General:

    ZN28G-12 indoor AC high-voltage vacuum circuit breaker is an indoor switching equipment with three-phase AC 50HZ and rated voltage 12KV. It is used for the protection and control of power grid equipment and industrial and mining enterprises. Because of the special advantages of vacuum circuit breaker, it is especially suitable for frequent operation, or many times to break the short circuit current.


    The vacuum circuit breaker has the advantages of simple structure and small volume, and the operating mechanism is the spring energy storage type. It can be operated by AC power or DC power supply, and up to three overcurrent trip devices can be installed. The circuit breaker adopts the integrated design of the operating mechanism and the circuit breaker body as the fixed installation unit. The vacuum arc extinguishing chamber part and the operating mechanism part are arranged front and back. The composite insulation overall structure is easy to install, no adjustment and little maintenance.





    Technical Parameters:

    ItemsUnitDate
    Rated voltage

    KV

    12
    Rated impulse withstand voltage75
    Rated short-time power frequency withstand voltage (1min)42
    Rated frequencyHz50
    Rated short-circuit breaking currentKA202531.540
    Rated currentA

    630 1000

    1250

    630 1000

    1250 1600

    1250 1600

    2000 2500

    1600 2000 2500 3150 4000
    Rated short-time withstand currentKA202531.540
    Rated peak tolerable current506380100
    Rated short-circuit making current (peak value)506380100
    Secondary circuit power frequency withstand voltage (1min)V2000
    Rated operation sequence

    O-0.3S-CO-180S-CO

    O-180S-CO-180S-CO (at 40KA)

    Rated duration of short circuit currentS4

    Rated single/back-to-back capacitance bank breaking current

    Set breaking current


    A630/400
    Rated short-circuit breaking current DC flow percentage≤35%
    Average closing speedm/s0.6±0.2
    Average opening speedm/s1.2±0.3
    Opening timems≤60
    Closing timems≤80
    Mechanical lifetimes10000
    Rated short-circuit breaking current breaking timestimes30
    Allowable wear accumulate thickness of moving and static contactsmm3
    Rated closing operating voltagevAC110/220 DC110/220
    Rated opening operating voltagevAC110/220 DC110/220
    Rated voltage of energy storage motorvAC110/220 DC110/220
    Contact opening distancemm11±1
    Contact strokemm4±1
    Contact bounce timems≤2

    Three - phase opening and closing

    heterogeneity

    ms≤2
    Opening contact rebound amplitudems≤3
    Main circuit resistanceΩ≤40 (≤25 at 40KA)




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