IT系(xi)統(tong)因降低了(le)(le)觸電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)和電(dian)(dian)(dian)(dian)(dian)(dian)網(wang)對(dui)地(di)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)（有效控制對(dui)心臟的(de)(de)(de)直(zhi)接漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)），故(gu)人身觸電(dian)(dian)(dian)(dian)(dian)(dian)危(wei)險被降到(dao)小程(cheng)度(du)（避免微事故(gu)）。IT系(xi)統(tong)內部一旦出(chu)現個(ge)對(dui)地(di)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)故(gu)障(zhang)，不會導致系(xi)統(tong)斷(duan)路器或熔斷(duan)器動作，因而保證了(le)(le)電(dian)(dian)(dian)(dian)(dian)(dian)源供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)可(ke)靠性（負載出(chu)現漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)情況(kuang)下不斷(duan)電(dian)(dian)(dian)(dian)(dian)(dian)）。有效保障(zhang)醫用(yong)設備(bei)(bei)的(de)(de)(de)正常運行。防止其他供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)回路中的(de)(de)(de)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)通過接地(di)線竄(cuan)入手術室、ICU、CCU等特殊場所的(de)(de)(de)醫用(yong)設備(bei)(bei)上對(dui)患者的(de)(de)(de)安(an)全構成威脅(xie)。醫用(yong)隔(ge)離電(dian)(dian)(dian)(dian)(dian)(dian)源減少了(le)(le)各(ge)種醫用(yong)設備(bei)(bei)可(ke)能(neng)出(chu)現的(de)(de)(de)對(dui)地(di)故(gu)障(zhang)。 由(you)上面的(de)(de)(de)分析可(ke)知，一個(ge)典(dian)型的(de)(de)(de)單相 IT系(xi)統(tong)，其組成設備(bei)(bei)主要包括：隔(ge)離變壓(ya)器、絕緣(yuan)監測器、電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)互感器，以(yi)及外(wai)接報警與顯示儀。

在0類(lei)和(he)1類(lei)醫(yi)院場所(suo)(suo)，由于無(wu)醫(yi)院設(she)備(bei)使用，或相(xiang)關設(she)備(bei)僅使用在人體些(xie)非致(zhi)命部(bu)位，所(suo)(suo)以(yi)可(ke)使用普通建欽物的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)漂源(yuan)(yuan)各和(he)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保護措施。一(yi)般(ban)采用TN系(xi)統(tong)(tong)或系(xi)統(tong)(tong)，并配備(bei)剩余電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)保護設(she)備(bei)RCD，當發生漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)超過(guo)30mA的(de)(de)(de)(de)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)事故時，RCD動作(zuo)，分斷(duan)(duan)故障回路。這(zhe)樣即使造(zao)成醫(yi)院設(she)備(bei)斷(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，也不(bu)會對(dui)(dui)患(huan)者(zhe)(zhe)(zhe)造(zao)成重大影響，醫(yi)生的(de)(de)(de)(de)診斷(duan)(duan)也可(ke)重新開始。IT系(xi)統(tong)(tong)作(zuo)用：降(jiang)低(di)出點(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓和(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網對(dui)(dui)地(di)(di)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)（有效控制對(dui)(dui)心臟的(de)(de)(de)(de)直接(jie)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)），故人身觸電(dian)(dian)(dian)(dian)(dian)(dian)(dian)危險被降(jiang)到低(di)程度(du)。可(ke)以(yi)防止接(jie)地(di)(di)系(xi)統(tong)(tong)內漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)竄入(ru)某些(xie)與患(huan)者(zhe)(zhe)(zhe)連接(jie)的(de)(de)(de)(de)醫(yi)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)設(she)備(bei)的(de)(de)(de)(de)對(dui)(dui)地(di)(di)回路，從而避(bi)免漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)對(dui)(dui)患(huan)者(zhe)(zhe)(zhe)安全所(suo)(suo)構成的(de)(de)(de)(de)威脅(xie)。該系(xi)統(tong)(tong)還(huan)可(ke)以(yi)避(bi)免漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)導致(zhi)系(xi)統(tong)(tong)短路器(qi)或熔斷(duan)(duan)器(qi)動作(zuo)，保證用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)持(chi)續性(xing)和(he)可(ke)靠性(xing)。一(yi)般(ban)用于不(bu)允許停電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)場所(suo)(suo)，或者(zhe)(zhe)(zhe)是要求嚴格地(di)(di)連續供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)地(di)(di)方(fang)，醫(yi)院的(de)(de)(de)(de)手術室和(he)ICU室等二類(lei)場所(suo)(suo)要采用IT系(xi)統(tong)(tong)。采用醫(yi)用隔離電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(IT)系(xi)統(tong)(tong)，即電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)中性(xing)點(dian)不(bu)接(jie)地(di)(di)，一(yi)旦設(she)備(bei)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，單相(xiang)對(dui)(dui)地(di)(di)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)很小，不(bu)會破壞電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)(de)(de)(de)平衡，所(suo)(suo)以(yi)比電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)中性(xing)點(dian)接(jie)地(di)(di)的(de)(de)(de)(de)系(xi)統(tong)(tong)安全、可(ke)靠。

在(zai)正常(chang)情(qing)況下，系(xi)(xi)統(tong)(tong)(tong)中僅(jin)存(cun)在(zai)線(xian)路對地(di)(di)(di)(di)(di)(di)電(dian)(dian)(dian)容(rong)的(de)微小(xiao)(xiao)泄漏電(dian)(dian)(dian)流(liu)。當系(xi)(xi)統(tong)(tong)(tong)發生(sheng)次單相接(jie)(jie)(jie)地(di)(di)(di)(di)(di)(di)故障(zhang)時，故障(zhang)電(dian)(dian)(dian)流(liu)為兩非故障(zhang)相對地(di)(di)(di)(di)(di)(di)電(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)流(liu)的(de)相量(liang)和 Id ，由于這個(ge)電(dian)(dian)(dian)流(liu)值甚小(xiao)(xiao)，不(bu)會(hui)造成(cheng)人身或者其它事(shi)故，也不(bu)會(hui)切斷(duan)電(dian)(dian)(dian)源(yuan)，保(bao)證了(le)系(xi)(xi)統(tong)(tong)(tong)供(gong)電(dian)(dian)(dian)的(de)連續性。醫(yi)用(yong)IT系(xi)(xi)統(tong)(tong)(tong)（俗稱(cheng)醫(yi)用(yong)隔離(li)電(dian)(dian)(dian)源(yuan)系(xi)(xi)統(tong)(tong)(tong)），又叫中性點不(bu)接(jie)(jie)(jie)地(di)(di)(di)(di)(di)(di)配電(dian)(dian)(dian)系(xi)(xi)統(tong)(tong)(tong)。在(zai)IT系(xi)(xi)統(tong)(tong)(tong)中，系(xi)(xi)統(tong)(tong)(tong)中性點對地(di)(di)(di)(di)(di)(di)完全隔離(li)，H+Line醫(yi)用(yong)it系(xi)(xi)統(tong)(tong)(tong)多少(shao)錢，系(xi)(xi)統(tong)(tong)(tong)負(fu)載中的(de)外(wai)殼(ke)經接(jie)(jie)(jie)地(di)(di)(di)(di)(di)(di)保(bao)護(hu)線(xian)接(jie)(jie)(jie)地(di)(di)(di)(di)(di)(di)。IT系(xi)(xi)統(tong)(tong)(tong)：IT系(xi)(xi)統(tong)(tong)(tong)的(de)電(dian)(dian)(dian)源(yuan)不(bu)接(jie)(jie)(jie)地(di)(di)(di)(di)(di)(di)或通過阻抗接(jie)(jie)(jie)地(di)(di)(di)(di)(di)(di)，電(dian)(dian)(dian)氣(qi)設(she)(she)備外(wai)露(lu)可(ke)導電(dian)(dian)(dian)部(bu)分可(ke)直接(jie)(jie)(jie)接(jie)(jie)(jie)地(di)(di)(di)(di)(di)(di)或通過保(bao)護(hu)線(xian)接(jie)(jie)(jie)到(dao)電(dian)(dian)(dian)源(yuan)的(de)接(jie)(jie)(jie)地(di)(di)(di)(di)(di)(di)體(ti)上(shang)，這也是保(bao)護(hu)接(jie)(jie)(jie)地(di)(di)(di)(di)(di)(di)。由于該系(xi)(xi)統(tong)(tong)(tong)出現(xian)次故障(zhang)時故障(zhang)電(dian)(dian)(dian)流(liu)小(xiao)(xiao)，電(dian)(dian)(dian)氣(qi)設(she)(she)備金(jin)屬外(wai)殼(ke)不(bu)會(hui)產生(sheng)危險性的(de)接(jie)(jie)(jie)觸(chu)電(dian)(dian)(dian)壓，因此可(ke)以不(bu)切斷(duan)電(dian)(dian)(dian)源(yuan)，使電(dian)(dian)(dian)氣(qi)設(she)(she)備繼續運行(xing)，并可(ke)通過報警裝置及檢查消除故障(zhang)。