【正文】 esign describs in detail how to select lightings and fix them. Besides, the paper also prehensively describes the load calculation, lowvoltage protection device selection and wire selection. The methods of calculating load are required coefficient method and binomial coefficient method, in the paper, we calculated through required coefficient method. In the selection of lowvoltage protection device, the paper describes how to select breaker and automatic switch. When choose a wire, its material, insulating sheath and carrying capacity should be taken into consideration. At last, according to Civil Construction Plans, AUTOCAD and Tianzheng Electrical Software are used to draw Electrical Engineering Drawings, distribution system maps and lightcurrent system figures. Key words： Building electricity， Illumination calculation， Load calculation， System diagram 蘭州交通大學(xué)畢業(yè)設(shè)計(jì)（論文） III 目 錄 摘 要 ..................................................................................................................................... I Abstract ...................................................................................................................................... II 1 緒論 ........................................................................................................................................ 1 建筑電氣概況 ............................................................................................................. 1 設(shè)計(jì)原則及依據(jù) ......................................................................................................... 1 設(shè)計(jì)內(nèi)容 ..................................................................................................................... 2 2 燈具選擇及照明計(jì)算 ............................................................................................................ 3 學(xué)校照明要求及燈具選擇 ......................................................................................... 3 學(xué)校照明 .......................................................................................................... 3 光源、燈具選擇及燈具布置 .......................................................................... 4 照明計(jì)算方法 ............................................................................................................. 5 本設(shè)計(jì)照度計(jì)算 ......................................................................................................... 8 應(yīng)急照明的設(shè)計(jì) ....................................................................................................... 10 3 負(fù)荷計(jì)算及低壓電器選擇 .................................................................................................. 12 負(fù)荷分級(jí)及供電要求 ............................................................................................... 12 負(fù)荷計(jì)算 ................................................................................................................... 13 需要系數(shù)法 .................................................................................................... 13 本設(shè)計(jì)負(fù)荷計(jì)算 ............................................................................................ 14 低壓保護(hù)裝置的選擇 ............................................................................................... 16 熔斷器的選擇方法 ........................................................................................ 16 自動(dòng)開關(guān)的選擇方法 .................................................................................... 17 電纜及導(dǎo)線選擇 ....................................................................................................... 18 導(dǎo)線概述 ........................................................................................................ 18 電纜及導(dǎo)線截面的選擇方法 ........................................................................ 19 室內(nèi)配 電線路的敷設(shè) .................................................................................... 20 本設(shè)計(jì)選用的導(dǎo)線線型及敷設(shè)方式 ............................................................ 21 插座選擇原則 ........................................................................................................... 21 插座選擇原則 ................................................................................................ 21 插座安裝 ........................................................................................................ 22 4 照明供配電系統(tǒng)設(shè)計(jì) .......................................................................................................... 23 照明供電和設(shè)計(jì)的一般要求 ................................................................................... 23 蘭州交通大學(xué)畢業(yè)設(shè)計(jì)（論文） IV 低壓配電系統(tǒng) ........................................................................................................... 23 低壓配電方式 ................................................................................................ 24 低壓配電系統(tǒng)的結(jié)構(gòu) .................................................................................... 25 本綜合樓配電系統(tǒng)的設(shè)計(jì) ....................................................................................... 26 5 弱電系統(tǒng)的設(shè)計(jì) .................................................................................................................. 27 概述 ........................................................................................................................... 27 有線電視系統(tǒng)設(shè)計(jì) ................................................................................................... 27 電話通信系統(tǒng)設(shè)計(jì) ................................................................................................... 28 本綜合樓弱電系統(tǒng)的設(shè)計(jì) ....................................................................................... 28 6 防雷和接地保護(hù) .................................................................................................................. 30 防雷概述 ................................................................................................................... 30 雷電的形成 ...................................................................................................