250 kV GIS

GISItemsUnitDataType desigateZF10-126 145Rated voltagekV126145Rated currentA2000/2500/3150Rated short-time withstand currentkA31.5, 40.Short-circuit durationS4Rated short time power frequency withstand voltage(To earth, between phases)kV230275(Across the open contact)315Rated lightening impulse withstand voltage (peak)(To earth, between phases)kV230+70630(Across the open contact)550750Rated SF6 gas pressure/alarm value (20°C)Mpa550+1000.6/0.53Gas compartment of the breaker: 0.6/ 0.53Other gas compartments: 0.5/ 0.4Annual SF6 gas leakage ratio%≤ 0.5moisture content of the SF6 gasppmThe breaker compartment:≤ 150 (at the time of delivery and reception)other gas compartments: ≤ 250 (at the time of delivery and reception)Partial DischargepC≤ 5Radio interference levelμ V≤ 5001. High reliability All live parts are enclosed inside with gas as insulation medium, ensuring the reliability 2. Strong capability withstanding the environment GIS inner live parts will not be influenced by the nature factors, such as wind, snow and rain, external pollution, high altitude etc. 3. High-quality inspection and less site work Modernized machining devices plus complete set of quality control system, requires less site installation work. 4. Reliable conductivity performance Self-energizing contact is adopted to ensure the electric endurance time for CB (20 operation under full-power) and 2000 operations under rated working current). 5. Less current eddy loss Most of enclosures are made of aluminum materials (except for PT and LA), with high anti-corrosion performance and less current eddy loss. 6. Excellent enclosure structure Cold-flanging procedure was performed for the enclosure, improving the electric field strength and reduce the size. 7. High dielectric reliability Insulators, rod etc. shall be tested by power frequency and PD measurement, whose requirement is stricter than IEC standard 8. CB short-circuit breaking current 63kA equipped with pneumatic, spring or hydraulic mechanism. The CB can be operated single pole or three poles. 9. New compact type with features such as low height, small size and bay distance less than 2m. 10. Improvement on layout, appearance, anti-corrosion performance etc. The product has passed all type tests at KEMA in Netherlands 11. Modular design and production, convenient and easy for site installation and maintenance GIS/