封閉密集型母線槽特點：

母(mu)線(xian)結(jie)構輕(qing)度高(gao)，標準節可制成3m、6m、8m按用(yong)戶要求選擇，可根據顧客要求在任意位置設置插口，插口間小(xiao)間距不小(xiao)于0.6m。

1.選擇(ze)正規企業(ye)的合格產品

　　母(mu)(mu)線槽應(ying)選用(yong)具有(you)(you)3C強制認證標記的(de)(de)產(chan)品，并有(you)(you)型式(shi)試(shi)驗(yan)報告。我國生(sheng)(sheng)產(chan)母(mu)(mu)線槽的(de)(de)廠家(jia)眾多魚龍混雜，制作方式(shi)多為手工(gong)制作，主要集中在江浙滬，上(shang)海就是的(de)(de)母(mu)(mu)線槽橋架之(zhi)鄉。采購時(shi)(shi)應(ying)對廠家(jia)的(de)(de)生(sheng)(sheng)產(chan)規模、技術力量、工(gong)人素質(zhi)及生(sheng)(sheng)產(chan)環境(jing)做(zuo)深(shen)入考察，特別(bie)是生(sheng)(sheng)產(chan)環境(jing)。因為絕緣處理若在不潔凈的(de)(de)空間中進行，絕緣層(ceng)中多少會(hui)存在一些導(dao)電(dian)微粒(li)，運行初期尚無關(guan)系，但時(shi)(shi)間一長就會(hui)造成絕緣損壞。

2.關注母線槽的導體(ti)材質

　　目前主要為銅(tong)(tong)(tong)排及鋁(lv)(lv)排、銅(tong)(tong)(tong)鋁(lv)(lv)復(fu)(fu)合(he)(he)(he)三種，價(jia)格差(cha)別較(jiao)大(da)。除了應該關注其(qi)(qi)純度(du)，還(huan)應注意材料彎折后的(de)(de)(de)機械性能(neng)(neng)。這里著(zhu)重(zhong)講一下銅(tong)(tong)(tong)鋁(lv)(lv)復(fu)(fu)合(he)(he)(he)，銅(tong)(tong)(tong)鋁(lv)(lv)復(fu)(fu)合(he)(he)(he)界(jie)面(mian)(mian)(mian)強(qiang)度(du)直接(jie)影(ying)響其(qi)(qi)加工性能(neng)(neng)和使用可靠性，是(shi)銅(tong)(tong)(tong)鋁(lv)(lv)復(fu)(fu)合(he)(he)(he)母線關鍵的(de)(de)(de)性能(neng)(neng)參數。在(zai)進行90°折彎時不(bu)(bu)(bu)起泡，不(bu)(bu)(bu)出(chu)現(xian)明顯的(de)(de)(de)桔(jie)子皮，沖孔、剪切時不(bu)(bu)(bu)出(chu)現(xian)銅(tong)(tong)(tong)鋁(lv)(lv)分(fen)層，才能(neng)(neng)在(zai)電氣設(she)備中(zhong)使用，達到(dao)了界(jie)面(mian)(mian)(mian)結(jie)合(he)(he)(he)強(qiang)度(du)的(de)(de)(de)要求。制造工藝(yi)不(bu)(bu)(bu)同，其(qi)(qi)界(jie)面(mian)(mian)(mian)結(jie)合(he)(he)(he)強(qiang)度(du)不(bu)(bu)(bu)同，用機械壓力(li)將銅(tong)(tong)(tong)、鋁(lv)(lv)壓接(jie)復(fu)(fu)合(he)(he)(he)，只(zhi)能(neng)(neng)激活界(jie)面(mian)(mian)(mian)原子形(xing)成原子鍵結(jie)合(he)(he)(he)，在(zai)經過熱(re)處(chu)理擴(kuo)散，使點結(jie)合(he)(he)(he)變為面(mian)(mian)(mian)結(jie)合(he)(he)(he)，但其(qi)(qi)擴(kuo)散深度(du)微薄，界(jie)面(mian)(mian)(mian)結(jie)合(he)(he)(he)強(qiang)度(du)并不(bu)(bu)(bu)高(gao)。在(zai)特(te)定的(de)(de)(de)工藝(yi)條件下加工，使銅(tong)(tong)(tong)鋁(lv)(lv)熔合(he)(he)(he)，才能(neng)(neng)形(xing)成界(jie)面(mian)(mian)(mian)結(jie)合(he)(he)(he)均勻，并有一定厚度(du)的(de)(de)(de)復(fu)(fu)合(he)(he)(he)層，達到(dao)較(jiao)高(gao)的(de)(de)(de)界(jie)面(mian)(mian)(mian)結(jie)合(he)(he)(he)強(qiang)度(du)。
　　經過大量試(shi)驗和計算(suan)機有限元(yuan)分析，當銅層截(jie)面(mian)占總(zong)截(jie)面(mian)20%時(shi)，具有性價比(bi)，20%比(bi)15%由(you)于趨膚效應的(de)作用，導(dao)電率(lv)要高(gao)很多(duo)，且硬度增(zeng)強，時(shi)間增(zeng)長(chang)，銅層截(jie)面(mian)所占比(bi)例(li)與銅鋁復(fu)合(he)母線的(de)比(bi)重是(shi)一個(ge)確定的(de)關系(xi)，當銅層截(jie)面(mian)占整(zheng)個(ge)截(jie)面(mian)的(de)10%、15%、20%時(shi)，其(qi)比(bi)重分別為3.32、3.63、3.94（g/㎝3）。
　　檢(jian)測銅層截面簡單(dan)的辦(ban)法是：找(zhao)一塊樣品，稱一下重(zhong)(zhong)量，計算(suan)樣品體積，算(suan)出比重(zhong)(zhong)。

3.選擇(ze)母線(xian)槽(cao)經濟截面

　　通(tong)常應(ying)(ying)按(an)(an)(an)長(chang)(chang)期(qi)工(gong)作電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)選(xuan)擇母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)截(jie)(jie)(jie)(jie)面。并按(an)(an)(an)通(tong)過短路電(dian)(dian)(dian)(dian)纜(lan)條(tiao)件下，校驗(yan)母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)的(de)(de)(de)短時(shi)(shi)(shi)熱(re)穩(wen)定性和(he)動(dong)穩(wen)定性。由于導(dao)體(ti)存(cun)在電(dian)(dian)(dian)(dian)阻和(he)多導(dao)體(ti)接(jie)近時(shi)(shi)(shi)交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)趨表效應(ying)(ying)等因素影響，母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)通(tong)過電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)時(shi)(shi)(shi)會引起發(fa)(fa)熱(re)。銅、鋁裸母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)長(chang)(chang)期(qi)工(gong)作時(shi)(shi)(shi)的(de)(de)(de)發(fa)(fa)熱(re)允(yun)(yun)許(xu)溫(wen)(wen)度(du)均為70℃，但(dan)當其接(jie)觸面具有(you)錫的(de)(de)(de)可靠覆蓋時(shi)(shi)(shi)（如超聲波搪錫等），則允(yun)(yun)許(xu)溫(wen)(wen)度(du)提高(gao)到85℃，受(shou)此(ci)持續發(fa)(fa)熱(re)允(yun)(yun)許(xu)溫(wen)(wen)度(du)的(de)(de)(de)限(xian)制(zhi)，不(bu)同材(cai)料、截(jie)(jie)(jie)(jie)面的(de)(de)(de)母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)給出(chu)了相應(ying)(ying)的(de)(de)(de)長(chang)(chang)期(qi)允(yun)(yun)許(xu)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)值，選(xuan)擇母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)截(jie)(jie)(jie)(jie)面時(shi)(shi)(shi)，應(ying)(ying)使母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)實際的(de)(de)(de)長(chang)(chang)期(qi)工(gong)作電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)小于所選(xuan)截(jie)(jie)(jie)(jie)面母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)的(de)(de)(de)長(chang)(chang)期(qi)允(yun)(yun)許(xu)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)值。在年(nian)均負(fu)荷(he)較(jiao)(jiao)大、母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)較(jiao)(jiao)長(chang)(chang)的(de)(de)(de)情況下（如屋外配電(dian)(dian)(dian)(dian)裝置(zhi)母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)），通(tong)常按(an)(an)(an)經(jing)濟電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)密(mi)(mi)度(du)法(fa)選(xuan)擇母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)。經(jing)濟電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)密(mi)(mi)度(du)是綜合考慮母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)損耗、母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)和(he)附屬設(she)備(bei)的(de)(de)(de)年(nian)維修(xiu)費與折(zhe)舊費為情況下，此(ci)時(shi)(shi)(shi)母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)單位截(jie)(jie)(jie)(jie)面積流(liu)(liu)(liu)過的(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)。用經(jing)濟電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)密(mi)(mi)度(du)除(chu)以不(bu)計入(ru)過負(fu)荷(he)的(de)(de)(de)長(chang)(chang)期(qi)工(gong)作電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)即得母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)截(jie)(jie)(jie)(jie)面。由經(jing)濟電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)密(mi)(mi)度(du)法(fa)選(xuan)擇的(de)(de)(de)母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)截(jie)(jie)(jie)(jie)面，一(yi)般比按(an)(an)(an)長(chang)(chang)期(qi)工(gong)作電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)選(xuan)擇的(de)(de)(de)母(mu)(mu)(mu)(mu)線(xian)(xian)(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)截(jie)(jie)(jie)(jie)面要大些(xie)。
 

封閉母線槽 封閉密集型母線槽產品示意圖