a.由于系(xi)(xi)(xi)統(tong)(tong)電(dian)(dian)(dian)源(yuan)端帶電(dian)(dian)(dian)導體不(bu)接(jie)地(di)，即使系(xi)(xi)(xi)統(tong)(tong)發(fa)生(sheng)單相(xiang)接(jie)地(di)故(gu)(gu)障(zhang)也只能通(tong)過系(xi)(xi)(xi)統(tong)(tong)對地(di)電(dian)(dian)(dian)容(rong)構成(cheng)回(hui)路(lu)，故(gu)(gu)障(zhang)回(hui)路(lu)阻抗(kang)極大，故(gu)(gu)障(zhang)電(dian)(dian)(dian)流小，發(fa)生(sheng)電(dian)(dian)(dian)流的危險(xian)很小，所以不(bu)必及(ji)(ji)時(shi)(shi)切斷(duan)電(dian)(dian)(dian)源(yuan)來防(fang)電(dian)(dian)(dian)流，從(cong)而維(wei)持供電(dian)(dian)(dian)不(bu)間(jian)斷(duan)，只有在發(fa)生(sheng)第二此接(jie)地(di)故(gu)(gu)障(zhang)時(shi)(shi)才要求切斷(duan)電(dian)(dian)(dian)源(yuan)。同時(shi)(shi)，安裝在系(xi)(xi)(xi)統(tong)(tong)中的絕緣(yuan)監測器能及(ji)(ji)時(shi)(shi)地(di)檢測并給(gei)出系(xi)(xi)(xi)統(tong)(tong)絕緣(yuan)故(gu)(gu)障(zhang)報警信號，提醒工作人員及(ji)(ji)時(shi)(shi)排除(chu)故(gu)(gu)障(zhang)。因此 IT 系(xi)(xi)(xi)統(tong)(tong)是一(yi)個連(lian)續、可靠的供電(dian)(dian)(dian)系(xi)(xi)(xi)統(tong)(tong)。

電(dian)(dian)源(yuan)正在向(xiang)小(xiao)型化(hua)和(he)集(ji)成化(hua)發展，在許多應(ying)用中，電(dian)(dian)源(yuan)在封閉環(huan)境中持續工作，如果積聚的(de)(de)熱(re)量無(wu)法散發，電(dian)(dian)源(yuan)內部的(de)(de)設備可能(neng)會因熱(re)應(ying)力過大(da)而損壞。常用的(de)(de)冷卻方法是(shi)自然風(feng)冷、散熱(re)器和(he)強制冷卻風(feng)扇。熱(re)設計(ji)的(de)(de)一些經驗分享如下：電(dian)(dian)源(yuan)模(mo)塊的(de)(de)對(dui)(dui)流通(tong)(tong)風(feng)。對(dui)(dui)于(yu)依靠自然對(dui)(dui)流和(he)熱(re)輻射散熱(re)的(de)(de)電(dian)(dian)源(yuan)，周圍環(huan)境必(bi)須便于(yu)對(dui)(dui)流通(tong)(tong)風(feng)，并且周圍沒有便于(yu)空氣流通(tong)(tong)的(de)(de)大(da)型設備。

如果(guo)出現(xian)單相接地(di)(di)(di)故障(zhang)，對地(di)(di)(di)漏電(dian)(dian)流(liu)(liu)只能經過(guo)系(xi)(xi)統(tong)(tong)泄露電(dian)(dian)容對系(xi)(xi)統(tong)(tong)相線(xian)構成回路(lu)，而系(xi)(xi)統(tong)(tong)泄露電(dian)(dian)容引(yin)起(qi)的(de)(de)容抗總(zong)是遠(yuan)遠(yuan)大于TN系(xi)(xi)統(tong)(tong)中(zhong)(zhong)的(de)(de)接地(di)(di)(di)電(dian)(dian)阻(zu)，因此IT系(xi)(xi)統(tong)(tong)中(zhong)(zhong)的(de)(de)漏電(dian)(dian)流(liu)(liu)非常的(de)(de)小，斷路(lu)器(qi)不會因接地(di)(di)(di)電(dian)(dian)流(liu)(liu)的(de)(de)存(cun)在而引(yin)起(qi)過(guo)電(dian)(dian)流(liu)(liu)動作，從而保證系(xi)(xi)統(tong)(tong)帶故障(zhang)運行。在隔離(li)變(bian)(bian)壓(ya)器(qi)系(xi)(xi)統(tong)(tong)中(zhong)(zhong)，提(ti)(ti)高回路(lu)的(de)(de)絕緣阻(zu)抗降(jiang)低回路(lu)對地(di)(di)(di)電(dian)(dian)容，是提(ti)(ti)高系(xi)(xi)統(tong)(tong)安全性(xing)與可(ke)靠(kao)性(xing)的(de)(de)關(guan)鍵(jian)。因此在系(xi)(xi)統(tong)(tong)設計時要盡量縮短系(xi)(xi)統(tong)(tong)配電(dian)(dian)線(xian)路(lu)的(de)(de)長度，減小系(xi)(xi)統(tong)(tong)容量，H+Line醫(yi)用(yong)it系(xi)(xi)統(tong)(tong)價格，減少系(xi)(xi)統(tong)(tong)分支回路(lu)數，并做好線(xian)路(lu)的(de)(de)絕緣防護措施。醫(yi)用(yong)IT供電(dian)(dian)系(xi)(xi)統(tong)(tong)由一臺(tai)隔離(li)變(bian)(bian)壓(ya)器(qi)，一臺(tai)絕緣電(dian)(dian)阻(zu)，變(bian)(bian)壓(ya)器(qi)溫度與電(dian)(dian)流(liu)(liu)負荷監測設備(bei)和一臺(tai)安裝于手術室或臨近的(de)(de)護士間的(de)(de)操作與報警終端組成。