描述
負(fù)載性質(zhì)對(duì)UPS輸出功率的影響。當(dāng)前大部分UPS生產(chǎn)廠家在產(chǎn)品說(shuō)明書(shū)中所給的輸出功率都是指負(fù)載功率因數(shù)為-0.8(滯后)時(shí)的值,而UPS電源實(shí)際可帶的負(fù)載量是與負(fù)載功率因數(shù)密切相關(guān)的。當(dāng)負(fù)載為純電阻性或電感性時(shí),逆變器在額定功率下其有功功率將有所下降。所以在考慮UPS容量時(shí),對(duì)不同的負(fù)載功率因數(shù)要進(jìn)行功率折算。通??勺鬟@樣的估算:假設(shè)負(fù)載功率因數(shù)為-0.8(滯后)時(shí)UPS額定功率為1kVA,則當(dāng)功率因數(shù)為-0.9和-1.0時(shí),輸出功率分別約為0.9~0.92kVA和0.74~0.77kVA。對(duì)于計(jì)算機(jī)類(lèi)負(fù)載,只要負(fù)載的峰值系數(shù)在UPS允許的范圍內(nèi),UPS基本上可以輸出額定功率,對(duì)于電感性負(fù)載,則需酌情加大UPS容量。
主營(yíng):本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門(mén)子、摩托羅拉、GE發(fā)那科、安川、博世力士樂(lè),ACSO,
力士樂(lè)等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。
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