【文章內(nèi)容簡介】 (55)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(56)、交流電焊機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(57)、插入式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(58)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(59)、交流電焊機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(60)、插入式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(61)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(62)、交流電焊機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(63)、插入式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(64)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(65)、交流電焊機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(66)、插入式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(67)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(68)、交流電焊機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(69)、插入式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(70)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(71)、交流電焊機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(72)、插入式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(73)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(74)、交流電焊機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(75)、插入式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(76)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(77)、交流電焊機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(78)、插入式振動器Kx = Cosφ = tgφ = Pjs = = kWQjs = Pjs tgφ= = kvar(79)、木工圓鋸Kx = Cosφ = tgφ = Pjs = 3 = kWQjs = Pjs tgφ= = kvar(80)、交流電焊機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(81)、建筑施工外用電梯Kx = Cosφ = tgφ = Pjs = 11 = kWQjs = Pjs tgφ= = kvar(82)、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(83)、自落式混凝土攪拌機Kx = Cosφ = tgφ = Pjs = 15 = kWQjs = Pjs tgφ= = kvar(84)總的計算負荷計算，總箱同期系數(shù)取 Kx = 總的有功功率Pjs = KxΣPjs = (++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++) = kW總的無功功率Qjs = KxΣQjs =(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++) = 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。分配箱至開關箱，開關箱至用電設備的導線敷設采用銅橡皮絕緣導線穿焊接鋼管敷設，由于這部分距離較短，因此不考慮電壓降，只按安全載流量選擇導線截面。(1)、鋼筋對焊機125開關箱至鋼筋對焊機125導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下機械啟動后需要系數(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BX495+150 ，穿焊接鋼管時其安全載流量為235A。iii)選擇電氣設備選擇開關箱內(nèi)開關為DZ10600/3 ，其脫扣器整定電流值為Ir = 480A。漏電保護器為 DZ10L250/3。(2)、N1箱至第1組電機(鋼筋對焊機125)的開關箱的導線截面及分配箱內(nèi)開關的選擇i) 計算電流鋼筋對焊機125Kx = Cosφ= tgφ= Ijs = KxPe 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BX495+150 ，穿焊接鋼管時其安全載流量為235A。iii)選擇電氣設備選擇分配箱內(nèi)開關為DZ10600/3 ，其脫扣器整定電流值為Ir = 480A。(3)N1箱進線及進線開關的選擇i)計算電流Kx = ，Cosφ = Ijs = KxPe /(Ue Cosφ) = 125/() = 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BX495+150 ，穿焊接鋼管時其安全載流量為235A。iii)選擇電氣設備選擇分配箱進線開關為DZ10600/3 ，其脫扣器整定電流值為Ir = 480A。(4)1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 = KxΣPe/(UeCosφ) = 125/() = 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 = KxΣ(PL)/C△U = 12550/(775) = mm2選擇BX495+150 ，穿焊接鋼管時其安全載流量為235A。ii)選擇出線開關1號干線出線開關選擇DZ10600/3 ，其脫扣器整定電流值為Ir =480A。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。分配箱至開關箱，開關箱至用電設備的導線敷設采用銅橡皮絕緣導線穿焊接鋼管敷設，由于這部分距離較短，因此不考慮電壓降，只按安全載流量選擇導線截面。(1)、鋼筋切斷機開關箱至鋼筋切斷機導線截面及開關箱內(nèi)電氣設備選擇（開關箱以下機械啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = KxPe /(Ue Cosφ) = 1() = ii)選擇導線選擇BX41+1 ，穿焊接鋼管時其安全載流量為14A。iii)選擇電氣設備由于開關控制2臺機械，開關的電流為Ir=(臺數(shù))= A。選擇開關箱內(nèi)開關為Hk130/3 ，熔斷器RC1A60其最大熔體電流為 IRD = 60A，可根，漏電保護器為 DZ10L100/3。(2)、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（開關箱以下機械啟動后需要系數(shù)取1）:i)計算電流Kx = 1 Cosφ = tgφ = Ijs = KxPe /(Ue Cosφ) = 13/() = ii)選擇導線選擇BX41+1 ，穿焊接鋼管時其安全載流量為14A。iii)選擇電氣設備由于開關控制2臺機械，開關的電流為Ir=(臺數(shù))= A。選擇開關箱內(nèi)開關為Hk115/3 ，熔斷器RC1A15其最大熔體電流為 IRD = 15A，可根，漏電保護器為 DZ10L100/3。(3)、N2箱至第1組電機(鋼筋切斷機、鋼筋彎曲機)的開關箱的導線截面及分配箱內(nèi)開關的選擇i) 計算電流鋼筋切斷機Kx = Cosφ= tgφ= Ijs = KxPe 臺數(shù)/(Ue Cosφ) = 2/() = 鋼筋彎曲機Kx = Cosφ= tgφ= Ijs = KxPe 臺數(shù)/(Ue Cosφ) = 32/() = Ijs(1組電機 )= 該組中最大的開關箱電流Ijs=由于該組下有多個開關箱，兩者中取大值Ijs==ii)選擇導線選擇BX44+1 ，穿焊接鋼管時其安全載流量為33A。iii)選擇電氣設備選擇分配箱內(nèi)開關為DZ550/3 ，其脫扣器整定電流值為Ir = 40A。(4)N2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BX44+1 ，穿焊接鋼管時其安全載流量為33A。iii)選擇電氣設備選擇分配箱進線開關為DZ550/