【正文】 關箱至分配箱計算，選擇導線及開關設備。(13)3號動力分箱進線及進線開關的選擇i)計算電流Kx = ，Cosφ = Ijs = KxPe /(Ue Cosφ) = () = 該分箱下最大組線電流Ijs=兩者中取大值Ijs=ii)選擇導線選擇XV4150 ，直接埋地時其安全載流量為326A。(11)、泥漿泵開關箱至泥漿泵導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 130/() = ii)選擇導線選擇XV410 ，穿焊接鋼管時其安全載流量為0A。(9)、鋼筋彎曲機開關箱至鋼筋彎曲機導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 13/() = ii)選擇導線選擇XV410 ，穿焊接鋼管時其安全載流量為0A。(7)、鋼筋調(diào)直機開關箱至鋼筋調(diào)直機導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 1() = ii)選擇導線選擇XV410 ，穿焊接鋼管時其安全載流量為0A。(5)、插入式振動器開關箱至插入式振動器導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 1() = ii)選擇導線選擇XV410 ，穿焊接鋼管時其安全載流量為0A。(3)、螺旋鉆孔機開關箱至螺旋鉆孔機導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 190/() = ii)選擇導線選擇XV495 ，穿焊接鋼管時其安全載流量為0A。(1)、蛙式夯土機開關箱至蛙式夯土機導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 1() = ii)選擇導線選擇XV410 ，穿焊接鋼管時其安全載流量為0A。(4)2號干線導線截面及出線開關的選擇i) 計算電流：按導線安全載流量：Kx = ，Cosφ = Ijs = Kx∑Pe/(UeCosφ) = () = A該干線下最大的分配箱電流Ijs=選擇的電流Ijs=按允許電壓降：S = Kx∑(PL)/C△U = 59/(775) = mm2選擇XV470 ，直接埋地時其安全載流量為213A。(2)、2號動力分箱至第1組電機(塔式起重機)的開關箱的導線截面及分配箱內(nèi)開關的選擇i) 計算電流塔式起重機Kx = Cosφ= tgφ= Ijs = Kx Pe 臺數(shù)/(Ue Cosφ) = 1/() = Ijs(1組電機 )= 該組中最大的開關箱電流Ijs=兩者中取大值Ijs=ii)選擇導線選擇XV470 ，穿焊接鋼管時其安全載流量為0A。2號干線線路上導線截面及分配箱、開關箱內(nèi)電氣設備選擇:在選擇前應對照平面圖和系統(tǒng)圖先由用電設備至開關箱計算，再由開關箱至分配箱計算，選擇導線及開關設備。(10)1號照明分箱進線及進線開關的選擇i)計算電流Kx = ，Cosφ = Ijs = KxPe /(Ue Cosφ) = () = 該分箱下最大組線電流Ijs=兩者中取大值Ijs=ii)選擇導線選擇XV410 ，直接埋地時其安全載流量為71A。(8)、高壓鈉燈開關箱至高壓鈉燈導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 11/() = ii)選擇導線選擇XV410 ，穿焊接鋼管時其安全載流量為0A。(6)、碘鎢燈開關箱至碘鎢燈導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 11/() = ii)選擇導線選擇XV410 ，穿焊接鋼管時其安全載流量為0A。(4)、熒光燈開關箱至熒光燈導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 1() = ii)選擇導線選擇XV410 ，穿焊接鋼管時其安全載流量為0A。(2)、熒光燈開關箱至熒光燈導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下用電器啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = Kx Pe /(Ue Cosφ) = 1() = ii)選擇導線選擇XV410 ，穿焊接鋼管時其安全載流量為0A。確定用電負荷:(1)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(2)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(3)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(4)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(5)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(6)、碘鎢燈Kx = Cosφ = tgφ = Pjs = 11 = kWQjs = Pjs tgφ= = kvar(7)、碘鎢燈Kx = Cosφ = tgφ = Pjs = 11 = kWQjs = Pjs tgφ= = kvar(8)、高壓鈉燈Kx = Cosφ = tgφ = Pjs = 1 = kWQjs = Pjs tgφ= = kvar(9)、塔式起重機Kx = Cosφ = tgφ = 將Jc =40%統(tǒng)一換算到Jc1 =25%的額定容量Pn = Pe = n(Jc/Jc1)1/2Pn = 1()1/2 = kWPjs = KxPe = = Qjs = Pjs tgφ= = kvar(10)、蛙式夯土機Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(11)、螺旋鉆孔機Kx = Cosφ = tgφ = Pjs = 90 = 27 kWQjs = Pjs tgφ=27 = kvar(12)、螺旋鉆孔機Kx = Cosφ = tgφ = Pjs = 90 = 27 kWQjs = Pjs tgφ=27 = kvar(13)、自落式混凝土攪拌機Kx = Cosφ = tgφ = Pjs = 15 = kWQjs = Pjs tgφ= = kvar(14)、插入式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(15)、平板式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(16)、鋼筋調(diào)直機Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(17)、鋼筋切斷機Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(18)、鋼筋彎曲機Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(19)、木工圓鋸Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(20)、泥漿泵Kx = Cosφ = tgφ = Pjs = 30 = kWQjs = Pjs tgφ= = kvar(21)、卷揚機Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(22)、卷揚機Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(23)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(24)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(25)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(26)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(27)、熒光燈Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(28)總的計算負荷計算，總箱同期系數(shù)取 Kx = 總的有功功率Pjs = Kx∑Pjs = (++++++++++27+27+++++++++++++++) = kW總的無功功率Qjs = Kx∑Qjs =(++++++++++++++++++++++++++) = kvar總的視在功率Sjs = ( Pjs2+Qjs2 )1/2 = (+)1/2 = kVA總的計算電流計算Ijs = Sjs/(Ue) = () = A1號干線線路上導線截面及分配箱、開關箱內(nèi)電氣設備選擇:在選擇前應對照平面圖和系統(tǒng)圖先由用電設備至開關箱計算，再由開關箱至分配箱計算，選擇導線及開關設備。(2)現(xiàn)場采用380V低壓供電，設一配電總箱，內(nèi)有計量設備，采用TNS系統(tǒng)供電。工程說明：本工程建設用地位于建筑總平圖中所示，本次開發(fā)建設的*****中心（一期）機房樓工程位于D區(qū)地塊。本工程由中國****保險集團公司投資建設，****技術集團有限公司設計，上海***建設監(jiān)理有限公司監(jiān)理，****（集團）有限公司組織施工；由***擔任項目經(jīng)理，***擔任執(zhí)行經(jīng)理，****擔任現(xiàn)場主管，****擔任技術負責人。一、編制依據(jù)《低壓配電設計規(guī)范》GB5005495中國建筑工業(yè)出版社《建筑工程施工現(xiàn)場供電安全規(guī)范》GB5019493中國建筑工業(yè)出版社《通用用電設備配電設計規(guī)范》GB5005593中國建筑工業(yè)出版社《供配電系統(tǒng)設計規(guī)范》GB5005295中國建筑工業(yè)出版社《施工現(xiàn)場臨時用電安全技術規(guī)范》JGJ462005中國建筑工業(yè)出版社《建筑施工安全檢查標準》JGJ5999二、施工條件施工現(xiàn)場用電量統(tǒng)計表:序號 機具名稱 型號 安裝功率(kW) 數(shù)量 合計功率(kW)1 熒光燈 1 2 熒光燈