| 摘要 |
PROBLEM TO BE SOLVED: To simplify fitting work of horizontal bus-bars and vertical bus-bars to be stored in a bus-bar chamber. SOLUTION: This distribution panel is provided with a first distribution chamber 20 for circulating cooling air at the side part of the first unit camber 16a for inserting a lower heating unit, a first wind tunnel 24 for circulating cooling air from a first unit chamber 16a to a bus-bar chamber 22 at the rear part of the first unit camber 16a, a second distribution chamber 21 for circulating cooling air at the side part of a second unit camber 17a for inserting a high heating unit, and a second wind tunnel 25 for circulating the cooling air from the second unit chamber 17a to the bus-bar camber 22, at the rear part of the second unit chamber 17a. At a ceiling plate 16d of the first wind tunnel 24 upper part, a capacity regulating device 1 consisting of an air hole 16e for permitting the cooling air to be flowed into the bus-bar chamber 22 from the first wind tunnel 24, and a regulation plate 2 for regulating the opening degree of the air hole 16a is formed at the ceiling plate 16d. Consequently, since the wind tunnel is not formed at the bus-bar chamber 22, the fitting work of horizontal bus-bars or vertical bus-bars is simplified. |
