| 摘要 |
PURPOSE: To ventilate a main body of a switchgear efficiently and conduct the visual inspection of equipments at the back of the main body of a switchgear easily by rectifying the air stream in the inside of the main body of a switchgear from an opening of a top board to an exhaust port by means of a rectifying and reflecting board in the exhaust box and reflecting light of a lighting fitting installed at the ceiling of an electric room which enters from the exhaust port, on the rectifying and reflecting board into the inside of the main body. CONSTITUTION: In an exhaust box 8, a gable roof rectifying and reflecting board 17 whose cross section is an isosceles triangle, in other words, which is twofold, is installed. By the board 17, the air stream of the inside of a main body of a switchgear 3 from an opening 7 of a top board 6 to an exhaust port 10 of the exhaust box 8 can be rectified and the main body 3 can be efficiently ventilated. At the same time, light of a lighting fitting 2 installed in an electric room 1 which enters the main body from the exhaust port 10 can be reflected on the board 17 into the inside of the main body 3 and thereby the light is cast on apparatuses at the back of the main body 3 and therefore a visual inspection of the apparatuses at the back of the main body can be conducted easily at the time of inspection. |
