1.1 LW8-40.5A (T) outdoor high-voltage sulfur hexafluoride circuit breaker is three-phase AC 50Hz outdoor high-voltage electrical equipment; It is applicable to the control and protection of 40.5kV power transmission and distribution system; It can also be used for connecting circuit breakers and opening and closing capacitor banks; The current transformer can be attached for measurement and protection. 1.2 LW8-40.5A (T) circuit breaker is equipped with CT35 or CT10 spring operating mechanism. 1.3 The circuit breaker shall comply with the national standard AC High Voltage Circuit Breaker (GB1984). 1.4 Main characteristics of circuit breaker
a. Excellent breaking performance, short arcing time, long electrical life, continuous breaking of rated short message current for 30 times under rated voltage without maintenance and replacement of sulfur hexafluoride gas;
b. The insulation is reliable, and the fracture resistance can be 40.5KV10min when the air pressure is at zero gauge pressure; c. High mechanical reliability, strong closing ability and frequent operation; d. The current of switching capacitor bank is 400A, without re ignition; e. There is no re ignition for 25 and 50 kilometers of long cut off line;
f. Simple structure, small size, long maintenance cycle. 1.5 Operating environmental conditions
a. Altitude: no more than 2500 meters; Plateau type 4000m;
b. Ambient temperature: - 30C -+40C (special requirements - 40C -+40C);
C. Relative humidity: daily average not more than 95%, monthly average not more than 90% (25C); d. Wind speed: no more than 35 m/s;
e. The pollution level is N; The creepage distance of porcelain bushing is 1256mm (1320mm) (the nominal specific creepage distance is not less than 31mm/kV). 4. Places without flammable substances, explosion hazards, chemical corrosion and severe vibration.