低壓補償電容柜內(nei)裝有共(gong)(gong)補(bu)(bu)(bu)(bu)(三(san)(san)相(xiang))電容(rong)(rong)器與分(fen)(fen)(fen)補(bu)(bu)(bu)(bu)(單(dan)相(xiang))電容(rong)(rong)器,在電容(rong)(rong)投(tou)切時,是(shi)(shi)(shi)共(gong)(gong)補(bu)(bu)(bu)(bu)的(de)(de)(de)先投(tou)入運(yun)行(xing),分(fen)(fen)(fen)補(bu)(bu)(bu)(bu)的(de)(de)(de)后投(tou)入運(yun)行(xing),因(yin)為負(fu)荷(he)分(fen)(fen)(fen)配時做(zuo)到三(san)(san)相(xiang)負(fu)荷(he)盡量平衡,對一個變壓器來說,不會只用某一相(xiang)的(de)(de)(de)負(fu)荷(he),所以三(san)(san)相(xiang)都有的(de)(de)(de)負(fu)荷(he)是(shi)(shi)(shi)大(da)頭(tou),各(ge)相(xiang)之間的(de)(de)(de)差異(yi)是(shi)(shi)(shi)小頭(tou),所以,大(da)部分(fen)(fen)(fen)應該是(shi)(shi)(shi)共(gong)(gong)補(bu)(bu)(bu)(bu),小部分(fen)(fen)(fen)是(shi)(shi)(shi)分(fen)(fen)(fen)補(bu)(bu)(bu)(bu),這樣更合理,更經濟(ji)(分(fen)(fen)(fen)補(bu)(bu)(bu)(bu)比共(gong)(gong)補(bu)(bu)(bu)(bu)貴),共(gong)(gong)補(bu)(bu)(bu)(bu)是(shi)(shi)(shi)三(san)(san)相(xiang)同時補(bu)(bu)(bu)(bu)償(chang)相(xiang)同的(de)(de)(de)容(rong)(rong)量,分(fen)(fen)(fen)補(bu)(bu)(bu)(bu)是(shi)(shi)(shi)每一相(xiang)的(de)(de)(de)補(bu)(bu)(bu)(bu)償(chang)容(rong)(rong)量分(fen)(fen)(fen)別計算,分(fen)(fen)(fen)別補(bu)(bu)(bu)(bu)償(chang)。
實際上在三相不平(ping)衡(heng)的(de)情況下,也是(shi)共(gong)補和分(fen)補都有,比方說(shuo)三相的(de)功率因(yin)數分(fen)別為0.53,0.67,0.71,那么在0.71以上這部(bu)分(fen),可(ke)以通過共(gong)補解決,另外兩相其他部(bu)分(fen)所需要的(de)無功就通過分(fen)補來補償。原因(yin)嘛,當然是(shi)為了節(jie)約成本(ben)。
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