China Circuit Breaker factory

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    xiao15xiao
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    ZW8-12 outdoor high voltage vacuum circuit breaker
    Summary
    ZW8-12 series outdoor high voltage vacuum circuit breaker, with rated voltage 12kV and AC three-phase frequency of 50HZ, is mainly applied to close and break load current, overload current and short-circuit current in country power net, city power net and small- type power system. The breaker adopts the structure of three phases in one box. Three -phase arc-extinguishing chamber is inside the metal box. SMC material, which has the advantages of high insulating strength and reliable performance, is used to insulate phase-to- phase and phase-to-earth.

    Specifications
    NoItemUnitData
    1Rated voltagekV 24
    2Max working voltagekV 24
    3Rated currentA630,1000,12501250,1600,2000,25001250,1600,2000,3150
    4Rated short-circuit opening currentkA20/2531.540
    5Rated short-circuit closing currentkA50/6380100
    6Rated peak withstand currentkA50/6380100
    74s rated short-time withstand currentkA2031.540
    8Rated
    Insulating
    LevelPower frequency withstand voltage
    (before and after rated breaking)kV42(fracture 48)
    Impulse withstand voltage
    (before and after rated breaking)kV75(fracture 85)
    9Rated operating sequence O-0.3 s-C&O-180s-C&O
    10Mechanical life endurancetime10000
    11Rated short-circuit opening current frequencytime50
    12Rated closing voltage of operating mechanism(DC)V110,220
    13Rated closing voltage of operating mechanism(DC)V110,220
    14Open contact clearancemm11±1
    15Super stroke(compressed length of contact springs)mm3.5 ± 0.5
    16Time differential among phases for opening and closingms≤2
    17Bounce time of closing contactsms≤2
    18Average opening speedms0.9~1.2
    19Average closing speedms0.5~0.8
    20Opening timeUnder maximum operating voltagems15~50
    Under minimum operating voltagems30~60
    21Closing timems≤100
    22Main loop resistance of each phaseμΩ≤50 (630A)≤45(1250A)≤35(1600-2000A)≤25(2500A以上)
    23Allowed accumulative wearing thickness of static&Moving contactmm3

    FAQ:
    Why choose pingchao Electric
    Here at Pingchao Electric Company,Promise customer satisfaction and guarantee first-class service. With over 5 years of business experience,we guarantee that our products are of the highest quality and reasonable price.
    What are our services?
    We manufacture 12kV, 24kV, 40.5kV switchgear fittings,Mainly earthing switches, interlocking devices, Vacumm circuit breaker,chassis trucks,copper contact,contact box ect.
    How are the quality of our products guaranteed?
    Each product produced by us will be 100% checked before delivery.If Any defective goods occurred,which will be returned free and be changed for new one.China Circuit Breaker factory
    website:http://www.switchgearfitting.com/circuit-breaker/

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