Primary switchgear HGIS

shuntinsulated

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. Advantages: 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