穩壓器選(xuan)型方法

1、容量安全系數

交流穩壓電源是以輸出視在功率(kVA)為標稱額定容量，而一般情況下負載都不是純電阻性的，即功率因數COS￠≠1，穩壓器實際能輸出的有功功率kW=容量(kVA)×COS￠。所以在實際選型時要按用電設備的額定功率、功率因數和負載類型等具體情況來合理選擇穩壓電源，其輸出功率應留有適當余量，特別是沖擊性負載選型時余量要更大，具體選型安全系數見下表
負載性(xing)質 設備類型(xing) 安(an)全系(xi)數 選(xuan)擇穩壓電(dian)源容量

純阻性(xing)負(fu)(fu)載(zai) 白熾燈、電(dian)(dian)(dian)(dian)阻絲、電(dian)(dian)(dian)(dian)爐等設備1.25~1.5 1.25~1.5倍負(fu)(fu)載(zai)總功(gong)率，感(gan)性(xing)、容(rong)性(xing)負(fu)(fu)載(zai) 熒光(guang)燈具、風(feng)機(ji)、電(dian)(dian)(dian)(dian)動(dong)機(ji)、水泵、空(kong)調(diao)、電(dian)(dian)(dian)(dian)腦(nao)、電(dian)(dian)(dian)(dian)冰箱(xiang)等2 ~ 3 ≥2~3倍負(fu)(fu)載(zai)總功(gong)率，大電(dian)(dian)(dian)(dian)感(gan)性(xing)、電(dian)(dian)(dian)(dian)容(rong)性(xing)負(fu)(fu)載(zai)（如電(dian)(dian)(dian)(dian)動(dong)機(ji)、電(dian)(dian)(dian)(dian)腦(nao)）環境下，選型時應考慮負(fu)(fu)載(zai)的起動(dong)電(dian)(dian)(dian)(dian)流(liu)(liu)特別(bie)大（達額定電(dian)(dian)(dian)(dian)流(liu)(liu)的5~8倍），所(suo)以選擇(ze)穩壓器(qi)容(rong)量(liang)時應是負(fu)(fu)載(zai)功(gong)率的2.5~3倍。

如：三相電機2.2kW 1臺，5.5 kW1臺，選用穩壓器(qi)時，容量≥（2.2kW 5.5kW）×2.5=19.25kVA，即至少要選用三相TNS-20 kVA以上產品的穩壓器(qi)。

2、非補償式穩壓電源輸出容量曲線

自耦式穩(wen)壓(ya)(ya)器(單相0.5kVA~3kVA、10k臥(wo)式及以下，三(san)相9kVA及以下)當輸(shu)(shu)入相電壓(ya)(ya)低于198V時，輸(shu)(shu)出容(rong)量(liang)就(jiu)開始下降；輸(shu)(shu)入相電壓(ya)(ya)等于160V時，下降到穩(wen)壓(ya)(ya)器額(e)定(ding)容(rong)量(liang)的50%。所(suo)以在電源電壓(ya)(ya)的低端特別(bie)要注意減輕負載降額(e)使用，以免(mian)使穩(wen)壓(ya)(ya)器過載燒毀(hui)；

自耦式穩(wen)壓器(qi)(qi)能夠(gou)同時輸出(chu)220V和110V兩(liang)種電壓。但即使(shi)是全(quan)部(bu)由110V輸出(chu)時，穩(wen)壓器(qi)(qi)所帶負載也(ye)不能超過額定容量的50%，否則就是過載使(shi)用。

穩壓器適用范圍

穩壓器[1]可廣泛應用于：工礦企業、油田、鐵路(lu)、建筑工地(di)、學校、醫院、郵(you)電(dian)(dian)(dian)、賓館(guan)、科(ke)研等部門的(de)電(dian)(dian)(dian)子計算(suan)機(ji)、精(jing)密機(ji)床(chuang)、計算(suan)機(ji)斷層掃描攝(she)影（CT）、精(jing)密儀器、試驗(yan)裝置、電(dian)(dian)(dian)梯(ti)照明、進口設(she)備及生(sheng)產流水(shui)線等需要(yao)電(dian)(dian)(dian)源[2]穩定電(dian)(dian)(dian)壓的(de)場(chang)所。也適應于電(dian)(dian)(dian)源電(dian)(dian)(dian)壓過低或過高、波(bo)動(dong)幅度大的(de)低壓配電(dian)(dian)(dian)網末端的(de)用戶(hu)及負載變動(dong)大的(de)用電(dian)(dian)(dian)設(she)備，特(te)別適用于一切對(dui)電(dian)(dian)(dian)網波(bo)形要(yao)求高的(de)穩壓用電(dian)(dian)(dian)場(chang)所。