在(zai)城(cheng)市軌道(dao)交(jiao)通通信中其(qi)(qi)48v通信電(dian)(dian)源(yuan)起到(dao)的(de)作用(yong)是十分(fen)重要(yao)(yao)的(de)，他的(de)功能就(jiu)是保證(zheng)(zheng)其(qi)(qi)穩定(ding)、可靠和安(an)全。穩定(ding)要(yao)(yao)求其(qi)(qi)供(gong)電(dian)(dian)的(de)電(dian)(dian)壓(ya)和頻率的(de)波(bo)動(dong)都必須在(zai)其(qi)(qi)允許的(de)范(fan)圍之內。可靠電(dian)(dian)源(yuan)是指能保證(zheng)(zheng)晝夜不間斷供(gong)電(dian)(dian)的(de)獨(du)立電(dian)(dian)源(yuan)。安(an)全是指電(dian)(dian)源(yuan)設備要(yao)(yao)采取保障安(an)全的(de)措施(shi)。 

       首先我們要(yao)保證城市軌道交(jiao)通(tong)48v通(tong)信(xin)(xin)(xin)電(dian)源(yuan)(yuan)系統(tong)必須(xu)是獨立的(de)供(gong)電(dian)系統(tong)，必須(xu)要(yao)滿足(zu)(zu)第(di)一(yi)類電(dian)源(yuan)(yuan)要(yao)求，取得(de)兩路可(ke)靠(kao)獨立的(de)電(dian)源(yuan)(yuan)，其中一(yi)路為專盤(pan)專線(xian)。當然還要(yao)城市軌道交(jiao)通(tong)通(tong)信(xin)(xin)(xin)電(dian)源(yuan)(yuan)設備應(ying)滿足(zu)(zu)通(tong)信(xin)(xin)(xin)設備對電(dian)源(yuan)(yuan)可(ke)靠(kao)性的(de)要(yao)求。滿足(zu)(zu)其不間斷供(gong)電(dian)的(de)需(xu)求。最后對要(yao)求直(zhi)(zhi)流(liu)供(gong)電(dian)的(de)通(tong)信(xin)(xin)(xin)設備，應(ying)采用集中方式(shi)供(gong)電(dian)。直(zhi)(zhi)流(liu)48v通(tong)信(xin)(xin)(xin)電(dian)源(yuan)(yuan)系統(tong)可(ke)由直(zhi)(zhi)流(liu)配電(dian)盤(pan)、整流(liu)模(mo)塊、直(zhi)(zhi)流(liu)變換(huan)器、逆變器、閥控式(shi)密閉鉛(qian)蓄電(dian)池組(zu)組(zu)合機架組(zu)成，并(bing)應(ying)具有遙信(xin)(xin)(xin)、遙測、遙控性能和標準的(de)接(jie)口(kou)及通(tong)信(xin)(xin)(xin)協議。