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    Indoor high voltage electrical components

    ZN12-12 series high voltage vacuum circuit breaker

    The ZN12-12 series vacuum circuit breaker is a rated voltage of 12kV, and the three-phase AC 50Hz indoor high voltage switch equipment is a product manufactured by the German Siemens technology.
    The operating mechanism of the circuit breaker structure is a spring energy storage type, which can be operated by AC or DC, or can be operated manually. The circuit breaker has simple structure, strong breaking ability, long life, complete operation function, no explosion danger, and simple maintenance. It is suitable for controlling or protecting power transmission and distribution systems such as power plants and substation, and is especially suitable for switching important loads and frequent operations. place. This product meets the GB1984-89 AC High Voltage Breaker standard.
    The operating mechanism of the circuit breaker structure is a spring energy storage type, which can be operated by AC or DC, or can be operated manually. The circuit breaker has simple structure, strong breaking ability, long life, complete operation function, no explosion danger, and simple maintenance. It is suitable for controlling or protecting power transmission and distribution systems such as power plants and substation, and is especially suitable for switching important loads and frequent operations. place. This product meets the GB1984-89 AC High Voltage Breaker standard.
    Description
    · operating environment (vacuum circuit breaker 3AF type (zn12-12 series))
    1. Ambient temperature: not more than + 40 ℃, no less than 25 (40 ℃) *.
    2. Altitude: no more than 2000m.

    · main technical parameters (vacuum circuit breaker type 3AF (zn12-12 series))


    project unit unit
    I ll lIl lV V Vl VII VIII IX X
    The rated voltage kV 12 12 12 12 12 12 12 12 12 12
    Rated current A 1250 1600 2000 2500 1600 2000 3150 1600 2000 3150
    Rated short circuit breaking current kA 31.5 31.5 31.5 31.5 40 40 40 50 50 50
    Dynamic stable current (peak) kA 80 80 80 80 130 130 130 140 140 140
    4S thermally stable current (50kA is 3s) kA 31.5 31.5 31.5 31.5 40 40 40 50 50 50
    Rated short circuit closing current (peak) kA 80 80 80 80 100 100 100 125 125 125
    Rated short circuit current breaking times A 50 30 12
    Rated operation sequence   Score -0.3s- composite score -180s- composite score Score -0.3s- composite score -180s- composite score
    Rated lightning impulse withstand voltage (full wave) kV 5
    Rated short-time frequency withstand voltage (1min) kV 42
    Closing time ms ≤75
    Break-brake time ms ≤60(50)
    Mechanical life A 20000(I~IV) 10000(V-X)
    Rated current breaking times A 20000(I~lV) 10000(V-X)
    Power of energy storage motor W 275
    Rated voltage of energy storage motor V 110 220
    Energy storage time s ≤15
    Rated voltage of closed electromagnet V AC、DC:110 220
    Rated voltage of parting electromagnet V AC、DC:110 220
    Rated voltage of energy storage shunt tripper V AC、DC:110 220
    Rated voltage of the voltage loss tripper V AC、DC:110 220
    Rated current of overcurrent tripper A 5
    Rated current for the auxiliary switch A AC10 DC5
    Note: the values in brackets refer to the time when the energy storage tripper is used to break off.
    · mechanical characteristic adjustment parameters (vacuum circuit breaker 3AF type (zn12-12 series))
    project unit Technical parameters
    I,II,III,IV V,Vl,Vll VII,IX,X
    Contactor trip

    mm 11±1 11±1 11±1
    Contact overtravel mm 8±2 8±2 4+1
    -0.5
    Closing speed m/s 0.6~1.4
    Break-brake speed m/s 1.0~1.8
    Contact closing and tripping time ms ≤2
    Interphase center distance mm 210±1.5 230±1.5 250±1.5 275±1.5 280±1.5
    Three - phase contact closing timing ms ≤2
    Resistance of each phase loop μΩ ≤35
    Note: closing speed refers to the average speed at the last 6mm of contact, and closing speed refers to the average speed at the first 6mm of contact.
    The contact opening distance of the inlet arc extinguishing chamber is 8 + / 1mm(31.5kA, 40Ka) from Siemens. Us Westinghouse is 8 mm(31.5kA); 8 + / - 1 mm (40 ka). · general structure (vacuum circuit breaker type 3AF (zn12-12 series))
    Send Inquiry

    Please feel free to contact with us at sales@cnshengyuan.cn, info@cnshengyuan.cn or filling up an enquiry form instructed at the bottom, You will get an effective response within 24 hours from Shengyuan sales representative.
    Thanks for your valued time with interest!

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