[課業] 電機機械:－2016徵求年菜推薦網路訂購最紅的商家.年菜訂購?台北年菜外送餐廳推薦(年菜)?年菜.今年不想做年菜推薦,網路宅配哪一家好?

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批踢踢實業坊 Examination 板

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[課業] 電機機械

Oct 27th 2013, 13:49, by stan915

作者stan915 (菌)

看板Examination

標題[課業] 電機機械

時間Sun Oct 27 13:49:47 2013

各位前輩午安三個25KVA，20,000/277v的配電變壓器以delta-Y的方式連接成三相變壓器對低壓側做開路試驗所得記錄如下 Vline,oc=480v Iline,oc=4.1A Psc(單相)=315w 我已經求出 Rc=243.902歐姆 Xm=j70.423歐姆當我求標么值時由於低壓側是Y接，所以我的Vbase是277除以根號3 = 160 得到以下基準值 Sbase=2500 Vbase=160 但是解答的Vbase卻是277 以至於Zbase的答案當然不一致想請問各位前輩是小弟的觀念有問題還是其實解答有誤A_A -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.39.39.86

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