1.1 LW8-40.5A(T) outdoor high-pressure sulphur hexafluoride sluice is a three-phase AC 50Hz outdoor high-voltage electrical equipment; suitable for control and protection of 40.5kV transmission and distribution system; also can be used for contact breaker and opening and closing In the case of capacitor banks; current transformers can be included for measurement and protection. 1.2 LW8-40.5A (T) type circuit breaker is equipped with CT35 or CT10 spring operating mechanism. 1.3 The circuit breaker complies with the national standard GB1984 "AC High Voltage Circuit Breaker". 1.4 main features of the circuit breaker
a. Excellent breaking performance, short arcing time, long electrical life, continuous breaking of rated short message current 30 times under rated voltage, no replacement of sulphur hexafluoride gas;
b. Insulation is reliable, the air pressure can withstand 40.5KV for 10 minutes when the pressure is zero gauge; c. High mechanical reliability, strong closing ability, and can operate frequently; d. Open and close capacitor bank current 400A without re-ignition; e. The long long line is 25, 50 km without reignition;
f. The structure is simple, the volume is small, and the maintenance period is long. 1.5 Use of environmental conditions
a. Altitude: no more than 2,500 meters; high prototype 4000 meters;
b. Ambient temperature: -30C- +40C (special requirements -40C--+40C);
C. Relative humidity: daily average is not more than 95%, monthly average is not more than 90% (25C); d. wind speed: no more than 35 meters / sec;
e. The pollution level is N grade; the porcelain sleeve creepage distance is 1256mm (1320mm) (nominal creepage ratio is not less than 31mm/kV). 4. There are no flammable substances, explosion hazards, chemical corrosion and severe vibration.