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1、母排選材規(guī)范1．常用母線規(guī)格及載流量如表所示。母排在測(cè)定環(huán)境下的載流量母排的載流量與母排的安裝方式有關(guān)。下表是母排豎立放置，允許溫度為70℃的數(shù)據(jù)。單片母線的載流量（θn=70℃）母線尺寸（寬x厚mm）銅（A）交流直流25℃30℃35℃40℃25℃30℃35℃40℃15x321019718517021019718517020x327525824222327525824222325x334032029927634032029927630x447544641838547544641838540x462558755050662558755050
2、640x570065961556770566462057150x586080975669787081876570550x6.395589884077496090284577863x6.31125105699091211451079101092880x6.314801390130012001510142013301225100x6.31810170015901470187517601650152063x81320124011601070134512651185109080x8169015901490137017551650154514201
3、00x820801955183016852180205019201770125x82400225521101945260024452290210563x101475138813001195152514321340123580x1019001786167015401990187017501610100x1023102170203018702470232021752000125x1026502490233021502950277025902390母線尺寸（寬x厚mm）鋁（A）交流直流25℃30℃35℃40℃25℃30℃35℃40℃15x316
4、515514513416515514513420x321520218917421520218917425x326524923321526524923321530x436534332129637034832630040x448045142238948045142238940x554050747543854551248044650x566562558553967063059054350x6.374069565160074570065560463x6.387081876570588082777571380x6.31150108010109321
5、17011001030950100x6.31425134012551155145513681280118063x81025965902831104097791584480x813201240116010701355127411921100100x816251530143013151690159014881370125x81900178516701540204019181795165563x1011551085101693611801110104095680x1014801390130012001540145013551250100x101
6、8201710160014751910179516801550125x1020701945182016802300216020201865母排水平放置當(dāng)母排平放且寬度≤63mm時(shí)，表中數(shù)據(jù)乘與0.95當(dāng)母排寬度>63mm時(shí)，表中數(shù)據(jù)乘與0.922．分支路按不小于支路電氣元件額定電流值，同時(shí)考慮到剛度進(jìn)行選擇；如在母線上開多個(gè)孔必須考慮所開孔對(duì)母線截面的影響，適當(dāng)增加母線截面積。3．根據(jù)選用母線的寬度確定搭接形式及鉆孔位置的要求如表所示。下表經(jīng)實(shí)際總結(jié)出的經(jīng)驗(yàn)數(shù)據(jù)，用以規(guī)范結(jié)構(gòu)設(shè)計(jì)，確定銅排的搭接形式；開孔大小及孔位尺寸根據(jù)選用母線的寬度確
7、定搭接形式及鉆孔位置的要求參照表圖例母線尺寸零件ABDFECf直徑螺栓螺母墊圈彈墊154010207624422050122698255012261110306015301312408020401312507514.51422231312336360901717262860601110448480801716801001001001515761121201525152020982520252511103025402530301312403040401111181811102242505014142222131260501417262213
8、6060171726261330127165.552242401210205.553015716763020716401510204020102050201226985025111050301
