| 摘要 |
<p>PURPOSE:To discharge air efficiently from a cubicle in a short time using less amount of insulating gas, by introducing said insulating gas through the valve on the lower part of said cubicle and discharging air from the valve on the inclined top, and reintroducing the gas after a certain time. CONSTITUTION:In a substitution process in which an insulating gas 3, such as SF6, is introduced in a gas cubicle 1 through a stop valve 2, and the air is discharged at a stop valve 4 on an inclined top 1a, the gas 3 is mixed with air and unsubstituted air remains. After being left for a certain time, the gas 3 with a greater sp.gr. moves downward and the air with a smaller sp.gr. moves upward. When substitution work is resumed at this point, the remaining air is discharged promptly along the angle of inclination 1a, through the valve 4. Thus, the density of gas 3 can be increased in a short time thereby reducing the required gas quantity.</p> |
