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SG(B)10 Series of Non-encapsulated Coil Three-phase


  • General

    The non-encapsulated coil three-phase dry type power transformer that adopt UL certificated NOMEX insulation system, with advantages of safe, reliable, energy saving, fireproof , explosion resistant, simple maintaining and so on. It has superior design, reasonable structure, elegant appearance, and its main performance index is superior to domestic standard, such as local discharge level, no-load loss, load loss, noise and capability of operating in serious humid environment, it can be installed in humid environment like places near lake, sea or river , also suitable for areas that require high fireproof capability and high load, such as high-rise, airport, station, dock, underground railway , hospital, electric power plant, metallurgy industr y, shopping center , residential area, petrochemical industr y, nuclear power station, nuclear submarine, etc.

    Product characteristics

    1.The elaborate designed coil structure and vacuum immersed treatment enable SG(B)10 transformer operates without local discharging, and no crack performance will be find during the whole service life, and its insulation level will be kept as good as beginning.
    2.The high voltage part adopts continuous wire winding, LV foil winding, vacuum immersed, curing processed and high strength ceramics supporting, with fine withstand capability to paroxysmal short -circuit current.
    3.Flame resisting, flameproof , nontoxic, self-extinguishing, fireproof .
    4.When burn SG(B)10 transformer in high temperature and open fire, almost no fume will by produced.
    5.Insulation of the transformer is H grade (180℃).
    6.The insulation layer is very thin, with strong short-time over load capability, needless of forced cooling, can be overloaded for 120% for long term and 140% for 3 hours. As this kind of insulation material has elasticity and will not be aged, it can be full loaded at once under ±50℃.

    Operating conditions

    1.Ambient temperature: -50℃~+50℃
    2.Altitude: ≤1000m
    3.Other requirements that are beyond the stipulation range of this technical manual, please negotiate with our technical department and indicate out when placing an order.

    Models and meaning


  • Main technical parameters

    1.Voltage grade: high voltage (kV): 3, 6, 6.3, 6.6, 10, 10.5, 11; Low voltage: 0.4, 0.69;
    2.High voltage tap range: ±5% or±2×2.5%;
    3.Mark of joint group: Y,yn0 or D,yn11



    Outline size list


  • Outline and installation size


    Size drawing of SG(B)10-100~400kV ASize drawing of SG(B)10-500~2500kV A

    Note: The outline dimensions and track gauge dimensions covered in the catalog are only for reference. Welcome to contact us for accurate dimensions


    Outline diagram of standard side coiling out of SG(B)10 type non-encapsulated coil power transformer


    Outline diagram of IP20 of SG(B)10 type non-encapsulated coil power transformer (HS1)


    Outline diagram of IP20 of SG(B)10 type non-encapsulated coil power transformer (HS2)


    Outline diagram of IP20 of SG(B)10 type non-encapsulated coil power transformer (HS3)

    Diagram of L V terminal


    The notice for placing order of dry type transformer



    The notice for placing order of dry type and oil immersed transformer

    1.Special type transformer
    a.We usually prepare a technical agreement according to customer's requirements, the content covers rated capacity, primary voltage, voltage regulating mode and grade, mark of joint group, impedance voltage, test date and other special technical requirements.
    b.Data mentioned in this catalogue subject to change without notice for further improvements. If there is any special technical request, please negotiate with us when placing and order.
    2.Power transformer
    a.Product model
    b.Rated capacity(kVA), capacity ratio of high, medium and low voltage winding of three-winding transformer(%)
    c.Rated voltage of high voltage side(kV), voltage-regulating mode, grade, and percent of tap voltage(%)
    d.Rated voltage of medium voltage side(kV), voltage-regulating mode, grade, and percent of tap voltage(%)
    e.Special requirements: like temperature, altitude, phase number, frequency, on-load-tap changer, insulation level, with trolley and current transformer or not.