【正文】 序號(hào) 機(jī)具名稱 型號(hào) 安裝功率(kW) 數(shù)量 合計(jì)功率(kW)1 蛙式夯土機(jī) HW32 1 2 插入式振動(dòng)器 ZX50 1 3 插入式振動(dòng)器 ZX50 1 4 平板式振動(dòng)器 ZB11 1 5 木工圓鋸 MJ104 3 1 3 6 木工圓鋸 MJ104 3 1 3 7 交流電焊機(jī) BX31201 9 1 9 8 真空吸水泵 HZX40 4 1 4 9 塔式起重機(jī) QT50 40 1 40 10 攪拌機(jī) JD350 15 1 15 11 鋼筋調(diào)直機(jī) GT4/14 4 1 4 12 鋼筋切斷機(jī) QJ40 7 1 7 13 鋼筋彎曲機(jī) GW40 3 1 3 14 交流電焊機(jī) BX32002 1 15 辦公區(qū)用電 20 1 20 16 生活區(qū)用電 20 1 20 合計(jì)用電 四、施工用電計(jì)算確定用電負(fù)荷:(1)、蛙式夯土機(jī)Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(2)、插入式振動(dòng)器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(3)、插入式振動(dòng)器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(4)、平板式振動(dòng)器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(5)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(6)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(7)、交流電焊機(jī)Kx = Cosφ = tgφ = 將Jc =50%統(tǒng)一換算到Jc1 =100%的額定容量Pn = Sn Cosφ = 9=Pe = n(Jc/Jc1)1/2Pn = 1()1/2 = kWPjs = KxPe = = Qjs = Pjs tgφ= = kvar(8)、真空吸水泵Kx = Cosφ = tgφ = Pjs = 4 = 3 kWQjs = Pjs tgφ=3 = kvar(9)、塔式起重機(jī)Kx = Cosφ = tgφ = 將Jc =40%統(tǒng)一換算到Jc1 =25%的額定容量Pn = 40kWPe = n(Jc/Jc1)1/2Pn = 1()1/240 = kWPjs = KxPe = = Qjs = Pjs tgφ= = kvar (10)、自落式混凝土攪拌機(jī)Kx = Cosφ = tgφ = Pjs = 15 = kWQjs = Pjs tgφ= = kvar (11)、鋼筋調(diào)直機(jī)Kx = Cosφ = tgφ = Pjs = 4 = kWQjs = Pjs tgφ= = kvar(12)、鋼筋切斷機(jī)Kx = Cosφ = tgφ = Pjs = 7 = kWQjs = Pjs tgφ= = kvar(13)、鋼筋彎曲機(jī)Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(14)、交流電焊機(jī)Kx = Cosφ = tgφ = 將Jc =50%統(tǒng)一換算到Jc1 =100%的額定容量Pn = Sn Cosφ = 9=Pe = n(Jc/Jc1)1/2Pn = 1()1/2 = kWPjs = KxPe = = Qjs = Pjs tgφ= = kvar(15)、交流電焊機(jī)Kx = Cosφ = tgφ = 將Jc =50%統(tǒng)一換算到Jc1 =100%的額定容量Pn = Sn Cosφ = =Pe = n(Jc/Jc1)1/2Pn = 1()1/2 = kWPjs = KxPe = = Qjs = Pjs tgφ= = kvar (16)、辦公區(qū)用電Kx = Cosφ = tgφ = Pjs = 20 = 18 kWQjs = Pjs tgφ=18 = kvar(17)、生活區(qū)用電Kx = Cosφ = tgφ = Pjs = 20 = 18 kWQjs = Pjs tgφ=18 = kvar總的計(jì)算負(fù)荷計(jì)算，總箱同期系數(shù)取 Kx = 總的有功功率Pjs= KxΣPjs=(+++++++3++++++++18+18) = kW總的無(wú)功功率Qjs= KxΣQjs=(++++++++++++++++) = kvar總的視在功率Sjs = ( Pjs2+Qjs2 )1/2 = (+)1/2 = kVA總的計(jì)算電流計(jì)算Ijs = Sjs/(Ue) = () = A 1號(hào)干線線路上導(dǎo)線截面及分配箱、開(kāi)關(guān)箱內(nèi)電氣設(shè)備選擇在選擇前應(yīng)對(duì)照平面圖和系統(tǒng)圖先由用電設(shè)備至開(kāi)關(guān)箱計(jì)算，再由開(kāi)關(guān)箱至分配箱計(jì)算，選擇導(dǎo)線及開(kāi)關(guān)設(shè)備。（3）本施工現(xiàn)場(chǎng)電源在北面，臨時(shí)用電從此處引出，總配電箱設(shè)置在靠近工地辦公室電源的配電房?jī)?nèi)。電工對(duì)本工程用電負(fù)直接責(zé)任，參加每次的安全用電驗(yàn)收和例查，做好日常電工巡查工作并做好記錄，嚴(yán)格按照操作規(guī)程及有關(guān)交底內(nèi)容操作，有權(quán)制止安全用電違章作業(yè)，發(fā)現(xiàn)用電隱患及違章操作及時(shí)處理并上報(bào)。該樓共6層，其中地下一層為雜物間，總高（檐高），半地下室結(jié)構(gòu)標(biāo)高3m，二～。一、工程概況該工程為 公寓樓2樓項(xiàng)目，由 建筑設(shè)計(jì)有限公司設(shè)計(jì)。該樓平面基本呈矩形，基礎(chǔ)為沖孔灌注樁基礎(chǔ)和柱下獨(dú)立基礎(chǔ)，主體為底部框架剪力墻結(jié)構(gòu)，上部為磚混結(jié)構(gòu)。安全員對(duì)本工程的臨時(shí)用電安全負(fù)直接領(lǐng)導(dǎo)責(zé)任，參加每次的安全用電驗(yàn)收，組織每周的安全用電檢查工作并做好記錄，督促檢查電工巡檢工作，發(fā)現(xiàn)問(wèn)題及時(shí)處理或上報(bào)，對(duì)存在用電安全隱患及違章作業(yè)不宜施工是有權(quán)暫停施工。（2）本工程臨時(shí)施工用電按照規(guī)范要求采用TN—S系統(tǒng)，三相四線，三級(jí)配電二級(jí)保護(hù)供電方式。（4）按照《JGJ462005》規(guī)定制定施工組織設(shè)計(jì)，接地電阻R≤4Ω。iii)選擇電氣設(shè)備選擇開(kāi)關(guān)箱內(nèi)隔離開(kāi)關(guān)為HR615/310，漏電保護(hù)器為 DZ15L100/30。(3)、插入式振動(dòng)器開(kāi)關(guān)箱至插入式振動(dòng)器導(dǎo)線截面及開(kāi)關(guān)箱內(nèi)電氣設(shè)備選擇（開(kāi)關(guān)箱以下用電器啟動(dòng)后需要系數(shù)取1）i)計(jì)算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 1() = ii)選擇導(dǎo)線選擇XV410 ，空氣明敷/架空線路時(shí)其安全載流量為57A。室外架空銅芯導(dǎo)線按機(jī)械強(qiáng)度的最小截面為10mm2，滿足要求。iii)選擇電氣設(shè)備選擇開(kāi)關(guān)箱內(nèi)隔離開(kāi)關(guān)為HR615/310，漏電保護(hù)器為 DZ15L100/30。(7)、交流電焊機(jī)開(kāi)關(guān)箱至交流電焊機(jī)導(dǎo)線截面及開(kāi)關(guān)箱內(nèi)電氣設(shè)備選擇（開(kāi)關(guān)箱以下用電器啟動(dòng)后需要系數(shù)取1）i)計(jì)算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 1() = ii)選擇導(dǎo)線選擇XV410 ，空氣明敷/架空線路時(shí)其安全載流量為57A