ZF28-252 type SF6 gas insulated switchgear

///ZF28-252 type SF6 gas insulated switchgear

ZF28-252 type SF6 gas insulated switchgear



  1. Product introduction:

ZF28-252 type GIS is composed of standard modules through flanged joint, which can meet the demand for substation optimization design through the flexible combination between modules. It saves space and conforms to technical requests.



  • Completely self-research and development with high starting point and large investment;
  • Inspected to be qualified by KEMA High level of parameters, advanced structural design;
  • High level of parameters, advanced structural design;
  • Insulation level is higher than IEC and GB standards;S
  • Self-blast combined interrupter, 3- position disconnector and earthing switch, spring operating mechanism;
  • Double sealing ring structure;
  •  Minimum area;
  •  Compact and standardized module design with minimum intervals width 1670mm;
  •  It is applied to cold, humid, salt fog, coastal, high altitude areas;
  • Autonomously process key components;
  • Spring operating mechanism base;
  • processed by  Four Axis Milling CNC Machining Center imported from DMG, German;Basin-type insulator: 
  • produced by  vacuum epoxy casting Production line imported from Germany Hubers;
  • Advanced painting production line; the same standard as automobile; Instrument transformer produce by  Jiangsu Sieyuan Hertz Instrument Transformer Co. Ltd;
  • Mutual inductor: Sieyuan Hertz Instrument Transformer Co. Ltd;
  • Advanced quality control system;
  • The whole process and whole life circle quality control;
  • Production management concept for preventing “four pests”;
  • Leaving factory after partial discharge and lightning impulse voltage test;
  • Partial discharge and lightning impulse voltage withstand test before delivery;
  • High safety factor;
  • O-ring seal;
  • Level 9 seismic resistance


  1. Application environment
  2. Installation site: indoor/outdoor;
    2. Ambient r temperature:
    Maximum temperature: +55

    Minimum temperature: -40

    Maximum daily temperature difference: 32K
    3. Altitude: 
    4. Sunshine intensity: 1000 W/m2;
    5. Pollution class: Class III/IV;
    6. Ice thickness: 10 mm/20 mm;
    7. Wind speed/ wind pressure: 34m/s( equals cylinder surface 700 Pa);
    8. Humidity:
    Average of daily relative humidity: 

                 Average of monthly relative humidity: 90%;
9. Seismic resisting ability: 9 degree;

III. Product features:

  • KEMA test verifies that ZF28-252 type GIS applies to solidly earthedl system (The first pole to clear factor is 1.3.);E2-M2-C2 level circuit breaker;
  • Special arc extinguish chamber design with spring operation mechanism;
  • Special arc extinguish chamber design with spring operation mechanism;
  • The structure is tight and the minimum interval width can reach 1670mm.
  • Three phase encapsulated main bus-bar and 3- position disconnector and earthing switch
  • Self- researched 3-position disconnector and earthing switch
  • The insulation level is higher than GB and IEC standard; under 80% power-frequency withstand voltage test voltage, the partial discharge shall be lower than 5pC.
  • German DMG four-axis boring machining center is usded to process CB mechanism;
  • German Hubers vacuum epoxy casting equipments are used to automatically process basin-type insulator.
  • The insulator adopts the metal flange structure ,and the epoxy resin will not expose to air; as a result, The service life is long. The double seal ring structure is used and the seal is reliable;
  • Self-produced electromagnetic type current/voltage transformer;
  • The integrated type and independent type control cabinet can be chosen. There are doors in the front or in the behind. The secondary components are imported and the protection level is IP55W.
  • The advanced surface painting line is used, which can paint GIS shell automatically.  
  1. Product usage
  • In populated regions, it can be compatible with the existing buildings. We can provide you with our products in important and critical substations, in the extension of limited substations, in flexible reform and change, in the heavy-loaded places where we can get economical and reliable energy management. Please tell us your needs.
  • ZF28-252 type GIS is one of the latest generation of switch equipments developed by Shanghai Siyuan high-voltage switchgear Co., Ltd. It obtains users’ trust because of its miniaturization design and reliable property. At present, the operation performance exists in most parts of domestic and overseas state grid and industry users


VI.Typical performance:

YunZe Xin with an annual output of 300000 tons of aluminum alloy plate and strip project

Wuzipo wind power plant project of Huaneng Dali Wind Power Co.,Ltd.

Qujing Power Supply Bureau of Yunnan Power Grid Company

Brasil 220kV Viamao 3 Substation