醫(yi)用設備(bei)發(fa)生絕(jue)緣故障時(shi)(shi)，因(yin)(yin)電(dian)(dian)(dian)(dian)源中(zhong)性點不(bu)接地(di)，當負載端出現對(dui)(dui)地(di)絕(jue)緣故障時(shi)(shi)，因(yin)(yin)其對(dui)(dui)地(di)不(bu)能構成(cheng)回(hui)路(lu)，只會產生一(yi)個很(hen)小(xiao)的(de)(de)漏電(dian)(dian)(dian)(dian)流(liu)，不(bu)會導致保(bao)護裝置（如空開）動(dong)作切斷(duan)供(gong)電(dian)(dian)(dian)(dian)，手(shou)術室(shi)不(bu)會發(fa)生突然停電(dian)(dian)(dian)(dian)事故，從而相對(dui)(dui)地(di)保(bao)證了(le)手(shou)術室(shi)供(gong)電(dian)(dian)(dian)(dian)的(de)(de)連續性。醫(yi)用隔離電(dian)(dian)(dian)(dian)源降低(di)了(le)對(dui)(dui)地(di)漏電(dian)(dian)(dian)(dian)流(liu)，故提(ti)高了(le)防火安全性。醫(yi)院在對(dui)(dui)醫(yi)用設備(bei)故障檢修維修時(shi)(shi)，經常需要在通電(dian)(dian)(dian)(dian)狀(zhuang)態下接觸電(dian)(dian)(dian)(dian)路(lu)中(zhong)的(de)(de)元器件或(huo)電(dian)(dian)(dian)(dian)路(lu)中(zhong)的(de)(de)地(di)線，使用醫(yi)用隔離電(dian)(dian)(dian)(dian)源可以(yi)防止(zhi)醫(yi)院設備(bei)維修人員觸電(dian)(dian)(dian)(dian)的(de)(de)危險。

醫(yi)用IT系(xi)統是(shi)指:醫(yi)用IT系(xi)統中的(de)電(dian)氣(qi)設備有外(wai)露(lu)導(dao)電(dian)部(bu)分通過保(bao)護線接地(di)(di)(di)．而電(dian)源隔離(li)(li)回路中的(de)設備外(wai)殼不(bu)做(zuo)接地(di)(di)(di)。它(ta)是(shi)采用特低(di)電(dian)壓(ya)回路輔以(yi)不(bu)接地(di)(di)(di)的(de)等電(dian)位連接（將(jiang)電(dian)源隔離(li)(li)區域內的(de)各個(ge)電(dian)氣(qi)設備金屬外(wai)殼用絕緣(yuan)導(dao)線互相連通）來獲得好的(de)安全的(de)效果。電(dian)源隔離(li)(li)適用于浴室、游泳池等危險大，對不(bu)間(jian)斷供電(dian)無特殊要求的(de)潮濕場所(suo)。

醫(yi)用隔離(li)電(dian)(dian)(dian)(dian)(dian)源降低了(le)對(dui)(dui)地(di)漏(lou)電(dian)(dian)(dian)(dian)(dian)流(liu)，故(gu)提高了(le)防火安全性。醫(yi)院在(zai)對(dui)(dui)醫(yi)用設(she)備(bei)故(gu)障(zhang)(zhang)檢(jian)修(xiu)維修(xiu)時，經常需(xu)要在(zai)通(tong)電(dian)(dian)(dian)(dian)(dian)狀(zhuang)態下接(jie)(jie)觸電(dian)(dian)(dian)(dian)(dian)路中(zhong)的(de)(de)(de)元器(qi)件(jian)或電(dian)(dian)(dian)(dian)(dian)路中(zhong)的(de)(de)(de)地(di)線，使(shi)用醫(yi)用隔離(li)電(dian)(dian)(dian)(dian)(dian)源可以(yi)防止醫(yi)院設(she)備(bei)維修(xiu)人員觸電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)危險。一(yi)旦隔離(li)電(dian)(dian)(dian)(dian)(dian)源上所接(jie)(jie)的(de)(de)(de)各種醫(yi)用設(she)備(bei)出(chu)現(xian)對(dui)(dui)地(di)故(gu)障(zhang)(zhang)，因其對(dui)(dui)地(di)不能構(gou)成回路，所以(yi)只能產生一(yi)個很小的(de)(de)(de)容(rong)(rong)性漏(lou)電(dian)(dian)(dian)(dian)(dian)流(liu)，極(ji)大地(di)保護了(le)患者免遭漏(lou)電(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)傷害(hai)。如果出(chu)現(xian)單相接(jie)(jie)地(di)故(gu)障(zhang)(zhang)，it系(xi)統(tong)廠商，對(dui)(dui)地(di)漏(lou)電(dian)(dian)(dian)(dian)(dian)流(liu)只能經過系(xi)統(tong)泄露電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)對(dui)(dui)系(xi)統(tong)相線構(gou)成回路，而系(xi)統(tong)泄露電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)引起的(de)(de)(de)容(rong)(rong)抗(kang)總是遠遠大于TN系(xi)統(tong)中(zhong)的(de)(de)(de)接(jie)(jie)地(di)電(dian)(dian)(dian)(dian)(dian)阻，因此IT系(xi)統(tong)中(zhong)的(de)(de)(de)漏(lou)電(dian)(dian)(dian)(dian)(dian)流(liu)非常的(de)(de)(de)小，斷路器(qi)不會(hui)因接(jie)(jie)地(di)電(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)存在(zai)而引起過電(dian)(dian)(dian)(dian)(dian)流(liu)動作，從而保證系(xi)統(tong)帶故(gu)障(zhang)(zhang)運行。