1.主母線最(zui)大(da)額(e)(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu):主母線最(zui)大(da)能(neng)夠承(cheng)載的(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)額(e)(e)(e)定(ding)值。2.額(e)(e)(e)定(ding)短時(shi)耐受(shou)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu):由(you)(you)生(sheng)產廠(chang)家給(gei)出的(de),成(cheng)套設備(bei)中某條(tiao)電(dian)(dian)(dian)(dian)(dian)路在(zai)國家標(biao)準(zhun)(zhun)GB7251.1-2005中8.2.3規(gui)定(ding)的(de)試驗條(tiao)件下能(neng)安全(quan)(quan)承(cheng)載的(de)短時(shi)耐受(shou)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)方(fang)均(jun)根(gen)值。3.峰值短時(shi)耐受(shou)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu):在(zai)規(gui)定(ding)試驗條(tiao)件下,生(sheng)產廠(chang)家規(gui)定(ding)此電(dian)(dian)(dian)(dian)(dian)路能(neng)夠圓滿(man)地承(cheng)受(shou)的(de)峰值電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。4.外(wai)殼防護(hu)(hu)等(deng)級(ji):IEC60529-1989標(biao)準(zhun)(zhun)由(you)(you)成(cheng)套設備(bei)提供的(de)防止觸(chu)及帶電(dian)(dian)(dian)(dian)(dian)部件,以及外(wai)來固(gu)體的(de)侵(qin)入(ru)和(he)液體的(de)進入(ru)的(de)等(deng)級(ji)。具(ju)體等(deng)級(ji)劃分詳見(jian)IEC60529標(biao)準(zhun)(zhun)。5.內部分隔方(fang)式:根(gen)據IEC60529-1989標(biao)準(zhun)(zhun),為(wei)保護(hu)(hu)人身安全(quan)(quan),將開關柜(ju)(ju)(ju)獨立(li)劃分成(cheng)幾個(ge)隔室的(de)不同方(fang)式。不同型號的(de)配電(dian)(dian)(dian)(dian)(dian)柜(ju)(ju)(ju)之(zhi)間(jian)的(de)技術(shu)(shu)參(can)數都(dou)有很(hen)大(da)不同,而進口配電(dian)(dian)(dian)(dian)(dian)柜(ju)(ju)(ju)的(de)技術(shu)(shu)參(can)數基本都(dou)優(you)于國產配電(dian)(dian)(dian)(dian)(dian)柜(ju)(ju)(ju),但并不能(neng)認(ren)為(wei)進口配電(dian)(dian)(dian)(dian)(dian)柜(ju)(ju)(ju)就一定(ding)比(bi)國產配電(dian)(dian)(dian)(dian)(dian)柜(ju)(ju)(ju)好。

必須選用符合GB 6829《剩余電流動作保護器的一般要求》標準、并經中國電工產品認證委員會認證合格的產品。訂做變壓器可選用類似LJM（J）系列節電型、且是低靈敏度的延時型保護器。變壓器價格保(bao)護器裝置的(de)方式要符(fu)合國家GB13955-2005《剩余電(dian)流(liu)動作(zuo)保(bao)護裝置的(de)安裝和運行(xing)》標準(zhun)。漏電(dian)保(bao)護器的(de)分斷(duan)時間，當漏電(dian)電(dian)流(liu)為額定漏電(dian)電(dian)流(liu)時，其動作(zuo)時間不(bu)應大于(yu)0.s。

施工(gong)用電(dian)(dian)(dian)(dian)配(pei)(pei)電(dian)(dian)(dian)(dian)系統應設置總配(pei)(pei)電(dian)(dian)(dian)(dian)箱(xiang)(xiang)、分配(pei)(pei)電(dian)(dian)(dian)(dian)箱(xiang)(xiang)、開(kai)關(guan)箱(xiang)(xiang)，并按照“總-分-開(kai)”順序作(zuo)分級設置，并形成“三級配(pei)(pei)電(dian)(dian)(dian)(dian)”模式。施工(gong)用配(pei)(pei)電(dian)(dian)(dian)(dian)系統各配(pei)(pei)電(dian)(dian)(dian)(dian)箱(xiang)(xiang)、開(kai)關(guan)箱(xiang)(xiang)的安(an)裝位置要(yao)合理。總配(pei)(pei)電(dian)(dian)(dian)(dian)箱(xiang)(xiang)要(yao)盡(jin)量靠(kao)近(jin)變壓器或外電(dian)(dian)(dian)(dian)源處，以(yi)便電(dian)(dian)(dian)(dian)源的引(yin)入。分配(pei)(pei)電(dian)(dian)(dian)(dian)箱(xiang)(xiang)應盡(jin)量安(an)裝在用電(dian)(dian)(dian)(dian)設備或負荷(he)相(xiang)對集中的中心地帶，確保三相(xiang)負荷(he)保持平衡。開(kai)關(guan)箱(xiang)(xiang)安(an)裝的位置應視現場情(qing)況和工(gong)況盡(jin)量靠(kao)近(jin)其控制的用電(dian)(dian)(dian)(dian)設備。

用軟(ruan)刷或吹風清除屏板(ban)插件(jian)和全部電(dian)磁開(kai)關(guan)零件(jian)的(de)積塵,并檢(jian)查控(kong)制柜內(nei)電(dian)器開(kai)關(guan)觸頭(tou)的(de)狀態(tai),接觸情況,線圈外(wai)表的(de)絕緣(yuan)以及機械部件(jian)的(de)動(dong)作是否可靠,更換熔絲時,應使熔斷電(dian)流與該回路的(de)電(dian)流相匹(pi)配。