目(mu)前市場上常用(yong)(yong)的(de)應急(ji)電(dian)(dian)(dian)(dian)源(yuan)UPS電(dian)(dian)(dian)(dian)源(yuan).EPS電(dian)(dian)(dian)(dian)源(yuan)和發電(dian)(dian)(dian)(dian)機。對于一(yi)般沒(mei)有電(dian)(dian)(dian)(dian)力知識的(de)人來說，備用(yong)(yong)電(dian)(dian)(dian)(dian)源(yuan)和應急(ji)電(dian)(dian)(dian)(dian)源(yuan)還(huan)是(shi)很(hen)難區(qu)分一(yi)兩個(ge)，兩者也有相應的(de)區(qu)別。

  主(zhu)(zhu)要區別在于(yu)(yu)：備用(yong)(yong)電(dian)(dian)(dian)(dian)源(yuan)(yuan)相對于(yu)(yu)主(zhu)(zhu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)命(ming)名，備用(yong)(yong)電(dian)(dian)(dian)(dian)源(yuan)(yuan)獨立于(yu)(yu)主(zhu)(zhu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)，而(er)不(bu)是系(xi)統電(dian)(dian)(dian)(dian)源(yuan)(yuan)，如果主(zhu)(zhu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)消(xiao)失，即主(zhu)(zhu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)故障，可使用(yong)(yong)備用(yong)(yong)電(dian)(dian)(dian)(dian)源(yuan)(yuan)，備用(yong)(yong)電(dian)(dian)(dian)(dian)源(yuan)(yuan)分為手(shou)動電(dian)(dian)(dian)(dian)源(yuan)(yuan)和自動電(dian)(dian)(dian)(dian)源(yuan)(yuan)，手(shou)動啟動需要手(shou)動啟動，以確保電(dian)(dian)(dian)(dian)力單位和個人(ren)能夠正(zheng)常用(yong)(yong)電(dian)(dian)(dian)(dian)。

  應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)與(yu)備(bei)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)區別(bie)在于獨立(li)的(de)(de)(de)供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)統，相對于獨立(li)的(de)(de)(de)小型自發電(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)統。它不受其(qi)他分(fen)支的(de)(de)(de)控制。應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)獨立(li)于主電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)和(he)(he)備(bei)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)，即不與(yu)外部(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)連接(jie)。當(dang)主電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)和(he)(he)備(bei)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)不能正(zheng)常(chang)供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時，應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)將使(shi)用自己獨立(li)的(de)(de)(de)反(fan)向發電(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)統供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，以確保其(qi)重(zhong)(zhong)要(yao)(yao)設備(bei)和(he)(he)應(ying)急(ji)(ji)(ji)(ji)照(zhao)明(ming)的(de)(de)(de)正(zheng)常(chang)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力可以輸送到(dao)其(qi)他應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)系(xi)統和(he)(he)十字路口指(zhi)示燈.消防系(xi)統.緊(jin)急(ji)(ji)(ji)(ji)逃生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)梯.疏散(san)照(zhao)明(ming).疏散(san)指(zhi)示.火災報警器.監控系(xi)統等。在主電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)和(he)(he)備(bei)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)正(zheng)常(chang)情況(kuang)下，應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)處(chu)于待機狀(zhuang)(zhuang)態，通常(chang)不能反(fan)映(ying)(ying)應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)重(zhong)(zhong)要(yao)(yao)性。當(dang)主電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)和(he)(he)備(bei)用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)斷(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時，反(fan)映(ying)(ying)了應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)主觀重(zhong)(zhong)要(yao)(yao)性。應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)不需要(yao)(yao)手(shou)動啟動，通常(chang)處(chu)于休(xiu)眠(mian)狀(zhuang)(zhuang)態。當(dang)主電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)斷(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時，應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)會自動醒來，為重(zhong)(zhong)要(yao)(yao)設備(bei)供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。應(ying)急(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)與(yu)主電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)之間的(de)(de)(de)切換時間可達0秒。