一(yi)(yi)(yi)些(xie)(xie)箱式(shi)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)的(de)(de)(de)基(ji)礎(chu)(chu)(chu)留有施工(gong)用孔洞(dong)，施工(gong)完(wan)成后(hou)沒能封堵(du)，或封堵(du)不(bu)嚴，或封堵(du)設施損壞(huai)后(hou)異物進(jin)(jin)(jin)入通道，對箱式(shi)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)造成危害。有些(xie)(xie)箱式(shi)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)斷路器間(jian)隔內的(de)(de)(de)操作、維護站(zhan)(zhan)板(ban)下留有進(jin)(jin)(jin)入基(ji)礎(chu)(chu)(chu)下部空間(jian)的(de)(de)(de)活(huo)動(dong)開(kai)門(men)，可以(yi)通過(guo)此處(chu)進(jin)(jin)(jin)行施工(gong)，這樣(yang)箱式(shi)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)基(ji)礎(chu)(chu)(chu)上就(jiu)不(bu)用預留施工(gong)孔洞(dong)，從(cong)而減少了不(bu)必要(yao)的(de)(de)(de)隱患。一(yi)(yi)(yi)些(xie)(xie)箱式(shi)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)的(de)(de)(de)基(ji)礎(chu)(chu)(chu)過(guo)高，進(jin)(jin)(jin)行相應的(de)(de)(de)操作時很不(bu)方便，同時也不(bu)安全。一(yi)(yi)(yi)些(xie)(xie)箱式(shi)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)的(de)(de)(de)箱門(men)向著道路開(kai)門(men)，人員進(jin)(jin)(jin)出(chu)時不(bu)安全，所以(yi)箱式(shi)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)門(men)不(bu)宜向道路開(kai)門(men)。基(ji)礎(chu)(chu)(chu)較高的(de)(de)(de)箱式(shi)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)應加裝相應的(de)(de)(de)活(huo)動(dong)站(zhan)(zhan)臺的(de)(de)(de)懸掛環，并(bing)加裝安全帶的(de)(de)(de)掛環，并(bing)配(pei)置(zhi)活(huo)動(dong)站(zhan)(zhan)臺，以(yi)便進(jin)(jin)(jin)行箱式(shi)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)的(de)(de)(de)維護和操作。

外(wai)殼(ke)選用鋼板(ban)或許合(he)金板(ban)，配有雙層(ceng)頂蓋(gai)，隔熱(re)性好。外(wai)殼(ke)及骨架全部通過防(fang)腐處理，具有長時(shi)間戶外(wai)運用的條件。外(wai)形及色彩可與環境(jing)彼(bi)此協調一致。裝置便利，在箱式變電(dian)站(zhan)的根底下(xia)面設有電(dian)纜室(shi)，而在低壓(ya)室(shi)內設有人(ren)孔(kong)可進入(ru)電(dian)纜室(shi)進行作業。

電纜(lan)分支箱從體(ti)積(ji)上看(kan)，歐式箱變因為(wei)內部裝置常規(gui)開關柜及變壓(ya)器，產品體(ti)積(ji)較大(da)。美式箱變因為(wei)選用(yong)一體(ti)化(hua)裝置體(ti)積(ji)較小。

散熱問(wen)題是(shi)(shi)現有(you)箱(xiang)式變電站(zhan)存在的(de)(de)主要(yao)問(wen)題之一，與之相關的(de)(de)問(wen)題還有(you)通風(feng)和防塵問(wen)題，3個問(wen)題互(hu)相影(ying)響和制約(yue)。溫升是(shi)(shi)太(tai)陽輻射(she)熱經箱(xiang)體(ti)傳人箱(xiang)內及箱(xiang)內變壓(ya)(ya)器、補償電容器等發熱引起的(de)(de)。箱(xiang)體(ti)內溫升過(guo)(guo)高會(hui)影(ying)響高低壓(ya)(ya)設(she)備和元(yuan)器件的(de)(de)正常(chang)運(yun)(yun)行，而要(yao)降低溫度(du)(du)。就要(yao)加強通風(feng)進行散熱，這又會(hui)引起安全防護和防塵的(de)(de)問(wen)題。我國大部分(fen)地(di)區，夏季比(bi)較炎熱，氣溫較高，由(you)于箱(xiang)式站(zhan)結構(gou)緊湊，變壓(ya)(ya)器內體(ti)積小，導致(zhi)變壓(ya)(ya)器溫度(du)(du)很高，再加之變壓(ya)(ya)器在運(yun)(yun)行過(guo)(guo)程(cheng)中要(yao)產生大量的(de)(de)熱量，此時(shi)通過(guo)(guo)自然(ran)通風(feng)散熱已經很難滿足要(yao)求了，有(you)時(shi)室內溫度(du)(du)甚(shen)至超過(guo)(guo)50℃，嚴重增加了運(yun)(yun)行設(she)備的(de)(de)損耗和故障率。