发电厂变电所中有的母线每相由四片同样规格的矩形铝排并联,断面排列成正方形的,称为盒形母线。施工中对于90°弯曲通常采用在弯曲处拼焊的方法,为了得到准确的90°弯角,必须控制住单片母线的拼接斜角β,两片母线拼接时的二面角θ。下面讨论这二个角度的计算。 Power plant substation in some of the bus by the same size four rectangular aluminum row in parallel, cross-section arranged in a square, known as box-shaped bus. For the 90 ° bending in construction, the method of welding at the bend is usually adopted. In order to obtain an accurate 90 ° bending angle, the splicing angle β of the single busbar and the dihedral angle θ of the two busbars must be controlled. The following discussion of the calculation of these two angles.