母排选材规范

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1、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（θn=70℃）母线尺寸（宽x厚mm）铜（A）交流直流25℃30℃35℃40℃25℃30℃35℃40℃15x321019718517021019718517020x327525824222327525824222325x334032029927634032029927630x447544641838547544641838540x462558755050662558755050

2、640x570065961556770566462057150x586080975669787081876570550x6.395589884077496090284577863x6.31125105699091211451079101092880x6.314801390130012001510142013301225100x6.31810170015901470187517601650152063x81320124011601070134512651185109080x8169015901490137017551650154514201

3、00x820801955183016852180205019201770125x82400225521101945260024452290210563x101475138813001195152514321340123580x1019001786167015401990187017501610100x1023102170203018702470232021752000125x1026502490233021502950277025902390母线尺寸（宽x厚mm）铝（A）交流直流25℃30℃35℃40℃25℃30℃35℃40℃15x316

4、515514513416515514513420x321520218917421520218917425x326524923321526524923321530x436534332129637034832630040x448045142238948045142238940x554050747543854551248044650x566562558553967063059054350x6.374069565160074570065560463x6.387081876570588082777571380x6.31150108010109321

5、17011001030950100x6.31425134012551155145513681280118063x81025965902831104097791584480x813201240116010701355127411921100100x816251530143013151690159014881370125x81900178516701540204019181795165563x1011551085101693611801110104095680x1014801390130012001540145013551250100x101

6、8201710160014751910179516801550125x1020701945182016802300216020201865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0.922．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

7、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154010207624422050122698255012261110306015301312408020401312507514.51422231312336360901717262860601110448480801716801001001001515761121201525152020982520252511103025402530301312403040401111181811102242505014142222131260501417262213

8、6060171726261330127165.552242401210205.553015716763020716401510204020102050201226985025111050301