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product outline
product parameters
product manual

I. 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.

1) Completely self-research and development with high starting point and large investment;
2) Inspected to be qualified by KEMA;
3) High level of parameters, advanced structural design;
4) Insulation level is higher than IEC and GB standards;
5) Self-blast combined interrupter, 3- position disconnector and earthing switch, spring operating mechanism;
6) Double sealing ring structure;
7) Minimum area; Compact and standardized module design with minimum intervals width 1670mm;
8) It is applied to cold, humid, salt fog, coastal, high altitude areas;
9) Spring operating mechanism base;

II. Application environment

  1. Installation site: indoor/outdoor;
  2. Ambient r temperature:
                Maximum temperature: +55℃
                Minimum temperature: -40℃
  3. Altitude: ≦3000m;
  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: ≦95%;

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

III. Product features:
1. Special arc extinguish chamber design with spring operation mechanism;
2. The structure is tight and the minimum interval width can reach 1670mm.
3. Three phase encapsulated main bus-bar and 3- position disconnector and earthing switch
4. Self- researched 3-position disconnector and earthing switch

VI. 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.


Main parameters:

        1.Rated voltage: 252 kV
2. Rated frequency: 50 Hz/60 Hz;
3. Rated current: 2500A/3150 A/4000A;
4. Rated power frequency 1 min withstand voltage:
         between open contacts: (460+145) kV;
         between phases,to earth:460kV

5. Rated lightning impulse-withstand voltage peak (1.2/ 50μs):
         between open contactsIsolated: (1050+206)kV;
         between phases,to earth:: 1050 kV;
6. Rated short-circuit breaking current: 50 kA;
7. Rated short-circuit making current (peak current): 130kA

8. Rated short-time withstand current and duration: 50 kA/ 3s;
9. Rated peak withstand current: 130kA