UPS不間(jian)斷電(dian)(dian)(dian)(dian)源作(zuo)為(wei)保護性(xing)(xing)(xing)的(de)(de)(de)電(dian)(dian)(dian)(dian)源設備，它的(de)(de)(de)性(xing)(xing)(xing)能參數具有(you)重(zhong)要意(yi)義，應是我(wo)們選購時的(de)(de)(de)考慮重(zhong)點(dian)。市(shi)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)壓輸入范圍寬，則(ze)(ze)表明對市(shi)電(dian)(dian)(dian)(dian)的(de)(de)(de)利用(yong)(yong)能力強（減少電(dian)(dian)(dian)(dian)池放電(dian)(dian)(dian)(dian)）。輸出電(dian)(dian)(dian)(dian)壓、頻率范圍小(xiao)，則(ze)(ze)表明對市(shi)電(dian)(dian)(dian)(dian)調整能力強，輸出穩定。波(bo)形(xing)(xing)畸變(bian)率用(yong)(yong)以衡量輸出電(dian)(dian)(dian)(dian)壓波(bo)形(xing)(xing)的(de)(de)(de)穩定性(xing)(xing)(xing),而電(dian)(dian)(dian)(dian)壓穩定度則(ze)(ze)說明當華為(wei)UPS不間(jian)斷電(dian)(dian)(dian)(dian)源突(tu)然由零負(fu)載加到(dao)滿負(fu)載時，輸出電(dian)(dian)(dian)(dian)壓的(de)(de)(de)穩定性(xing)(xing)(xing)。
小功率UPS電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)即不(bu)(bu)間斷電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，是一(yi)種(zhong)含有儲能裝置，以(yi)逆(ni)變器為主要(yao)組成(cheng)部(bu)分的(de)(de)(de)恒壓(ya)恒頻的(de)(de)(de)不(bu)(bu)間斷電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)。主要(yao)用于給單臺計算機、計算機網(wang)絡系統或其(qi)它電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)子設(she)(she)備提供(gong)(gong)不(bu)(bu)間斷的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)力供(gong)(gong)應。當市(shi)電(dian)(dian)(dian)(dian)(dian)輸入正(zheng)常時，UPS將市(shi)電(dian)(dian)(dian)(dian)(dian)穩壓(ya)后(hou)供(gong)(gong)應給負載使(shi)用，此時的(de)(de)(de)UPS就(jiu)是一(yi)臺交(jiao)流(liu)市(shi)電(dian)(dian)(dian)(dian)(dian)穩壓(ya)器，同時它還向機內電(dian)(dian)(dian)(dian)(dian)池充電(dian)(dian)(dian)(dian)(dian)；當市(shi)電(dian)(dian)(dian)(dian)(dian)中斷（事(shi)故停(ting)電(dian)(dian)(dian)(dian)(dian)）時，UPS立即將機內電(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)能，通過(guo)逆(ni)變轉換的(de)(de)(de)方法(fa)向負載繼續供(gong)(gong)應220V交(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)，使(shi)負載維持正(zheng)常工作并保(bao)護負載軟、硬(ying)件不(bu)(bu)受損壞。UPS設(she)(she)備通常對電(dian)(dian)(dian)(dian)(dian)壓(ya)過(guo)大(da)和電(dian)(dian)(dian)(dian)(dian)壓(ya)太(tai)低都提供(gong)(gong)保(bao)護。
