母排选材规范.doc

母排选材规范1常用母线规格及载流量如表所示。母排在测定环境下的载流量母排的载流量与母排的安装方式有关。下表是母排竖立放置，允许温度为70的数据。单片母线的载流量（n=70 ）母线尺寸（宽x厚mm）铜（A）交流直流253035402530354015x321019718517021019718517020x327525824222327525824222325x334032029927634032029927630x447544641838547544641838540x462558755050662558755050640x570065961556770566462057150x586080975669787081876570550x6.395589884077496090284577863x6.31125105699091211451079101092880x6.314801390130012001510142013301225100x6.31810170015901470187517601650152063x81320124011601070134512651185109080x816901590149013701755165015451420100x820801955183016852180205019201770125x82400225521101945260024452290210563x101475138813001195152514321340123580x1019001786167015401990187017501610100x1023102170203018702470232021752000125x1026502490233021502950277025902390母线尺寸（宽x厚mm）铝（A）交流直流253035402530354015x3 165 155 145 134 165 155 145 13420x3 215 202 189 174 215 202 189 17425x3 265 249 233 215 265 249 233 21530x4 365 343 321 296 370 348 326 30040x4 480 451 422 389 480 451 422 38940x5 540 507 475 438 545 512 480 44650x5 665 625 585 539 670 630 590 54350x6.3 740 695 651 600 745 700 655 60463x6.3 870 818 765 705 880 827 775 71380x6.3115010801010 932117011001030 950100x6.31425134012551155145513681280118063x81025 965 902 8311040 977 915 84480x813201240116010701355127411921100100x816251530143013151690159014881370125x81900178516701540204019181795165563x10115510851016 936118011101040 95680x1014801390130012001540145013551250100x1018201710160014751910179516801550125x1020701945182016802300216020201865母排水平放置当母排平放且宽度63mm时，表中数据乘与0.95 当母排宽度63mm时，表中数据乘与0.92 2分支路按不小于支路电气元件额定电流值，同时考虑到刚度进行选择；如在母线上开多个孔必须考虑所开孔对母线截面的影响，适当增加母线截面积。3根据选用母线的宽度确定搭接形式及钻孔位置的要求如表所示。下表经实际总结出的经验数据，用以规范结构设计，确定铜排的搭接形式；开孔大小及孔位尺寸根据选用母线的宽度确定搭接形式及钻孔位置的要求参照表图 例母 线 尺 寸零 件ABDFECf直径螺栓螺母垫圈弹垫154010207624422050122698255012261110306015301312408020401312507514.514222313123363609017172628606011104484808017168010010010015157611212015251520209825202525111030254025303013124030404011111818111022425050141422221312605014172622136060171726261330127165.552242401210205.5530157167630207164015102040201020502012269850251110503013125040602015306025603060408030204080408050806010040255010050100606015122676224260209880157680209880251110100151226762242100209810025111010030131260601110448480801716801001001004母线宽面弯曲（平弯）推荐的弯曲半径如表4所示。母线宽面弯曲（平弯）推荐的弯曲半径铜排厚度折弯内母半径=1-4R=6=5-6R=10=8-12R=155母线窄面弯曲(立弯)最小允许弯曲半径 母线尺寸50*5 立弯半径尺母线宽度 母线尺寸60*5 立弯半径尺1.5母线宽度6母线扭转90时,其扭转部分的总长度不小于母线宽度2.5倍7母线连接时在母线上开孔直径应比螺栓直径大1mm8母线