電機機械 - 考試
By Daph Bay
at 2013-10-27T13:49
at 2013-10-27T13:49
Table of Contents
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
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