牛场站信号楼照明与配电系统设计 毕业设计.doc

摘 要 本设计针对牛场站信号楼照明与配电系统进行设计。具体内容包括照明设计、配电系统设计、导线截面选择、主要电气设备选型、线路敷设及设备安装、等电位联接、防雷接地等系统设计。本文以国家现行的建筑标准及相关规范为依据，根据工程设计资料进行设计。 在照明设计中，照度计算采用工程中常用的利用系数法，在此基础上根据信号楼对应急照明的需要完成了电气照明的平面布置图。配电系统设计中，运用需要系数法对信号楼的各个用电设备和各类负荷进行负荷计算，完成了整个信号楼的配电系统设计，并且选择配电箱的安装位置。通过计算线路的计算电流，按照规定根据电线和电缆的载流量选择导线截面。在主要电气设备选型部分，明确选择低压电器的一般方法，并根据实际情况选择合适的设备。此信号楼采用一级防雷，根据建筑物的结构，参考顶层平面图，进行防雷方式的选择与布置以及接地电阻的确定，并完成等电位联接系统的设计。 设计中考虑了未来发展，留下足够的发展空间。通过本次设计，证明设计方案切实可行，主要设备选型合理，为施工安装提供依据，达到安全供电和经济节能的目标。 关键词：信号楼；照明设计；配电系统设计；防雷；等电位联接 Abstract The design is done for the station signal building lighting and power distribution system. Concrete contents include the lighting design, distribution system design, wire cross section selection, switching equipment selection, line laying and installation of equipment, equal potential links and lightning protection grounding system design. The design is based on the present national building standards and related specifications according to engineering design data. In the lighting design, illumination calculation applies the common utilization factor method. The paper completes the electrical lighting of the floor plan according to the need for emergency lighting of the signal building. In distribution design, the load calculations use demand factor method. Through the load calculations, it is completed the entire signal building power distribution system design and selected the installation location of power distribution boxes. In accordance with the provisions, the paper selects wire cross in line with the current-carrying capacity of wire and cable by calculating the calculating current line. In the main electrical equipment selection, it chooses general method of low-voltage electrical clearly, and chooses the appropriate equipments actually. This signal building uses one level lighting protection. According to the building structure and referring to the top floor plans the selection and arrangement of lighting protection methods are performed, and the ground resistanc