電纜流量計(jì)算要點(diǎn)

1、電纜流量計(jì)算重點(diǎn)電纜流量計(jì)算重點(diǎn)5/5電纜流量計(jì)算重點(diǎn)在采納電線電纜時(shí)，一般要注意電線電纜型號、規(guī)格(導(dǎo)體截面)的選擇。電線電纜型號的選擇采納電線電纜時(shí)，要考慮用途，敷設(shè)條件及安全性；比方，依據(jù)用途的不一樣樣，可采納電力電纜、架空絕緣電纜、控制電纜等；依據(jù)敷設(shè)條件的不一樣樣，可采納一般塑料絕緣電纜、鋼帶鎧裝電纜、鋼絲鎧裝電纜、防腐電纜等；依據(jù)安全性要求，可采納不延燃電纜、阻燃電纜、無鹵阻燃電纜、耐火電纜等。電線電纜規(guī)格的選擇確立電線電纜的使用規(guī)格(導(dǎo)體截面)時(shí)，一般應(yīng)試慮發(fā)熱，電壓損失，經(jīng)濟(jì)電流密度，機(jī)械強(qiáng)度等選擇條件。依據(jù)經(jīng)驗(yàn)，低壓動(dòng)力線因其負(fù)荷電流較大，故一般先按發(fā)熱條件選擇截面，此后驗(yàn)算

2、其電壓損失和機(jī)械強(qiáng)度；低壓照明線因其對電壓水平要求較高，可先按贊成電壓損失條件選擇截面，再驗(yàn)算發(fā)熱條件和機(jī)械強(qiáng)度；對高壓線路，則先按經(jīng)濟(jì)電流密度選擇截面，此后驗(yàn)算其發(fā)熱條件和贊成電壓損失；而高壓架空線路，還應(yīng)驗(yàn)算其機(jī)械強(qiáng)度。若用戶沒有經(jīng)驗(yàn)，則應(yīng)征詢相關(guān)專業(yè)單位或人士的建議。一般電線電纜規(guī)格的采納拜見下表：電線電纜規(guī)格采納參照表說明：1.同一規(guī)格鋁芯導(dǎo)線載流量約為銅芯的0.7倍，采納鋁芯導(dǎo)線可比銅芯導(dǎo)線大一個(gè)規(guī)格，交聯(lián)聚乙烯絕緣可采納小一檔規(guī)格，耐火電線電纜則應(yīng)選較大規(guī)格。2.本表計(jì)算容量是以三相380V、Cos0.85為基準(zhǔn)，若單相220V、Cos0.85，容量則應(yīng)1/3。3.當(dāng)環(huán)境溫度較高或

3、采納明敷方式等，其安全載流量都會降落，此時(shí)應(yīng)采納較大規(guī)格；當(dāng)用于頻繁起動(dòng)電機(jī)時(shí)，應(yīng)采納大23個(gè)規(guī)格。4.本表聚氯乙烯絕緣電線按單根架空敷設(shè)方式計(jì)算，若為穿管或多根敷設(shè)，則應(yīng)采納大23個(gè)規(guī)格電壓降速查品字型電緊挨一字間距一字單心載流量電壓降m電壓降序號銅電線型號壓降mv/型電壓降型電壓降兩心載流量(25。C)(A)三心載流量(25。(25。C)(A)v/Mmv/MMmv/Mmv/M0.950.850.7VVYJVVVYJVVVY11.5mm2/c202530.8626.7326.7326.73161613122.5mm2/c283518.918.918.918.9233518.918234mm2

4、/c385011.7611.7611.7611.76343811.7623346mm2/c48607.867.867.867.8640557.86324510mm2/c65854.674.044.044.0555754.67455616mm2/c901102.952.552.562.55701082.9607725mm2/c1151501.871.621.621.631001401.9801835mm2/c1451801.351.171.171.191251751.31051950mm2/c1702301.010.870.880.9145210113011070mm2/c2202850.710

5、.610.620.651902650.716521195mm2/c2603500.520.450.450.52303300.52200212120mm2/c3004100.430.370.380.422704100.42235313150mm2/c3504800.360.320.330.373104700.35275314185mm2/c4105400.30.260.280.333605700.29320415240mm2/c4806400.250.220.240.294306500.24390416300mm2/c5607400.220.20.210.285007000.2145051740

6、0mm2/c6508800.20.170.20.266008200.1918500mm2/c75010000.190.160.180.2519630mm2/c88011000.180.150.170.2520800mm2/c110013000.170.150.170.24211000mm2/c130014000.160.140.160.24品字型電緊挨一字間距一字電壓降m電壓降序號銅電線型號單心載流量(25。C)(A)壓降mv/型電壓降型電壓降兩心載流量(25。C)(A)三心載流量(25。v/Mmv/MMmv/Mmv/M0.950.850.7123456789101112131.5mm2/c2

7、.5mm2/c4mm2/c6mm2/c10mm2/c16mm2/c25mm2/c35mm2/c50mm2/c70mm2/c95mm2/c120mm2/c150mm2/cVV22YJV22VV22YJV22VV22YJ202530.8626.7326.7326.731616131283518.918.918.918.9233518.9182385011.7611.7611.7611.76294511.7624348607.867.867.867.8638587.8632465854.674.044.044.0553824.67455881102.952.552.562.55721112.9617

8、1131571.871.621.621.63971451.98511421921.351.171.171.191201801.310511712321.010.870.880.9140220112412182940.710.610.620.651802850.716022653550.520.450.450.52503500.5220123054100.430.370.380.422704250.4223523554780.360.320.330.373104850.3527531415161718192021185mm2/c240mm2/c300mm2/c400mm2/c500mm2/c630mm2/c800mm2/c1000mm2/c4105500.30.260.280.333605800.2932344906600.250.220.240.294306500.2438145607500.220.20.210.28500700