Product Index

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product outline
product parameters
product manual

I. Product introduction:
72.5-550kV HGIS 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)The domestic first high power spring operation mechanism of circuit breaker has the small volume and is safe and stable, free of maintenance. high reliable and conform to oil free and gas free requirements for operation mechanism;
2)Interrupter unit adopts shunt capacitor to balance the voltage between open contacts It improves short line fault breaking capability;
3)Excellent insulation level and low partial discharge. The only company in the industry that can achieve: under the 80% power-frequency withstand voltage ;
4)Partial discharge and lightning impulse voltage withstand test before delivery; The hidden trouble of discharge must be eliminated and ensure the reliability of  products

II. Application environment
      1. Installation site: indoor/outdoor;
      2. Ambient temperature:
                        Maximum temperature: +55℃;
                        Minimum temperature: -40℃;
                        Maximum daily temperature difference: 32 K;
      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 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.

72.5-550kV HGIS is one of the latest generation of switch equipments developed by Shanghai Siyuan high-voltage switch limited company. It obtains users’ trust because of its miniaturization design and reliable property. At present, this whole set of equipment have passed the KEMA, Netherland  type test.
IV. Product feature
1)Fully spring mechanism, high reliability;
2)Excellent breaking ability;
3)Strong rated current flow capacity;
4)Excellent insulation level, low partial discharge


Technical Parameters:
1.Rated Voltage:72.5-550 kV;
2.Rated Frequency:50 Hz/60Hz;
3.Rated Current: 3150A,4000A/5000A/6300A