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SZ9 and SFZ9 Series Three-phase On-load-tap-changing


  • General

    1.This kind of product is applied to power system of three-phase, 50Hz as well as 35kV and below, it is the main transformer equipment of medium and small-sized transformer substation, supplies power distribution, power and illumination for the industry and agriculture.
    2.The company introduces domestic and overseas advanced technique, adopts the latest material and optimizes design, which enables the product structure more reasonable, and greatly improves the product electric strength, mechanical strength and heat-sinking capability. S9 Series product has passed the short circuit test prepared by Wuhan High Voltage Research Institute and also the test prepared by National Center for quality Supervision & T est of T ransformer .

    Structural Features

    1.Iron core
    The iron core is made of high quality cold rolled silicon steel sheet, adopts the kinds of types like full-bias multi-step seam, no punched hole, winding iron core, etc., besides, both stainless steel stay plate and epoxy glass belt are for clamping it.
    2.Coil
    High quality enameled wire that is made of oxygen free copper or paper wrapped flat copper wire is used as conductor, the coils is provided kinds of types such as drum type, spiral type, improved spiral type, continuous type and interleaved type.
    3.Oil tank
    The oil tank is of barrel type or shield type, the heat-sinking element is provided with corrugated plate or plated radiator . The transformer has not been equipped with trolley, but there is a base that accords with national standard rail gauge welded at the bottom of box for your convenience.
    4.Safety protection device
    According to national standard and users' requirements, the transformer may be equipped with following safety protection devices: pressure relief valve, gas relay, signal thermometer, oil purifier, oil conservator, oil sampling valve, etc.


    Implementation of the standards
    GB1094.1-1996 GB1094.2-1996 GB1094.3-2003 GB1094.5-2003 GB/T6451-2008 GB311.1-1997 JB/T10088-2004

    Service Environment

    1.Altitude: ≤1000m
    2.Ambient temperature: the highest temperature +40℃, the highest monthly mean temperature+30℃; The highest yearly mean temperature+20℃.
    3.Installation environment: inclination of installation place<3°, no obvious dirt and corrosive or flammable gas.

    Models and meaning






  • Main technical parameters
    SZ9 and SFZ9 series three-phase on-load-tap-changing power transformer of 35k

    TypeRated capacity(kVA)VoltageConne
    ction
    Loss(kW)No-load current (%)Short circuit impedance (%)Weight (t)
    H.V(kV)L.V
    (kV)
    Load lossNo-load
    loss
    Oil weightTotal weightAdding oil weightTranspor
    tation weight
    SZ9-1600/35160035± 3×2.5% 38.5± 3×2.5%11
    10.5
    6.6
    6.3
    Ynd112.218.50.96.51.86.50.44.9
    SZ9-2000/3520002.920.20.96.52.07.00.66.3
    SZ9-2500/3525003.422.70.96.52.28.10.76.9
    SZ9-3150/3531504.1260.87.02.59.30.77.6
    SZ9-4000/3540004.930.70.87.02.711.40.88.1
    SZ9-5000/3550005.8360.757.03.112.90.810.5
    SZ9-6300/3563007.038.70.757.53.615.40.913
    SFZ9-8000/35800035±
    3×2.5%
    38.5±
    3×2.5%
    10.5
    6.3
    Yd119.9430.77.54.517.80.915.4
    SFZ9-10000/351000011.650.60.77.54.619.31.017.2
    SFZ9-12500/351250013.859.90.785.924.71.222.5
    SFZ9-16000/351600016.2730.786.632.52.027
    SFZ9-20000/352000019.584.60.787.936.72.131
    SFZ9-25000/352500022.5100.20.788.138.52.235
    SFZ9-31500/353150026.41240.6810.540.52.336

    SZ9 series three-phase on-load-tap-changing power transformer of 10kV


    TypeRated
    capacity
    (kVA)
    VoltageConne
    ction
    Loss(kW)No-load
    current
    (%)
    Short circuit
    impedance
    (%)
    Weight (t)
    Oil
    weight
    Total
    weight
    Transpor
    tation
    weight
    H.V(kV)L.V
    (kV)
    Load
    loss
    No-load
    loss
    SZ9-100/1010010±4×2.5% 10.5±4×2.5% 6.3±4×2.5% 6±4×2.5%0.4Yyno0.362.51.84.02.27.77.7
    SZ9-200/102000.423.11.84.03.2512.512.5
    SZ9-250/102500.513.61.74.03.513.213.2
    SZ9-315/10315Yd110.614.31.64.03.914.314.3
    SZ9-400/1040010.5±4×2.5% 6.3±4×2.5% 6±4×2.5%0.4Dyn11 Yyno0.735.21.54.04.21717
    SZ9-500/105000.876.211.44.05.419.519.5
    SZ9-630/106301.127.651.34.56.226.226.2
    SZ9-800/108001.369.361.24.58.433.8533.85
    SZ9-1000/1010001.59111.14.59.054242
    SZ9-1250/1012501.8713.051.04.510.447.547.5
    SZ9-1600/1016002.3915.570.94.514.557.657.6
    SZ9-2000/10200010±3×2.5% 10.5±3×2.5%0.4Y d112.8518.60.86.519.57979
    SZ9-2500/1025006.3
    3.15
    3.2521.50.86.522.78686
    SZ9-3150/1031504.125.30.86.529.59898
    SZ9-4000/1040005.229.90.76.53210.575
    SZ9-5000/1050005.934.030.76.536.611.688.1
    SZ9-6300/1063007.238.50.76.545.613.3110
    SFZ9-8000/1080009.642.50.76.551.216.63135.5