论文部分内容阅读
笔者设计出一套实验室供电新方案。具体做法如下: 将引入实验室的单相电源线,经过双刀单掷闸刀开关,引上天花板,然后沿教室纵向分成平行走向的两对干线,并固定好。 取长约1.8m(视教室天花板的高度酌定)宽6cm、厚约2cm的长条木板,刷上白漆。然后在其一端钉入一枚直径4mm的粗元钉,其外留长度不小于4cm。在靠元钉一端板面上,固定好多孔电源插座(板)和长方形保险丝盒,接好电线。该电线宜用胶皮硬导线,紧固在木板上。电线长度应超过木板30～40cm,超长部分绕成螺旋弹簧状备用。木板的另一端装上铰链。整个木板装置如附图—(1)所示。
The author designed a new laboratory power supply program. The specific approach is as follows: The single-phase power cord of the laboratory will be introduced into the ceiling through a double-pole single-throw knife switch and then divided into two pairs of parallel trunks along the longitudinal direction of the classroom and fixed. Take a length of about 1.8m (depending on the height of the ceiling of the classroom) and a length of 6cm wide and about 2cm thick strips of wood and brush with white paint. Then, a 4mm diameter thick nail is nailed at one end, and the length of the outer nail is not less than 4cm. On the end of the nail plate, fix the porous power socket (board) and the rectangular fuse box and connect the wires. The wire is preferably hardwired with rubber and fastened to the board. The length of the wire should be more than 30-40cm from the board, and the extra long part is wound into a coil spring for use. The other end of the board is hinged. The entire wooden device is shown in Figure (1).