90kw电机星三角用多大电缆
gen ju ti mu wo men xian lai ji suan dian dong ji de e ding dian liu : dian dong ji e ding dian ya 3 8 0V gong lv yin shu qu 0. 8 xiao lv qu 9 0% e ding dian liu I n = 9 0/ 1 . 7 3 2 * 0. 3 8 * 0. 8 * 0. 9 A = 1 9 0A yin wei shi xing san jiao qi dong , dian dong ji yin lai 6 gen xian , jiao jie shi zai wai bu wan cheng , suo yi liu guo dao xian de dian liu shi xiang dian liu san jiao xing lian jie de fu zai xian dian liu = √ 3 xiang dian liu , suo yi xiang dian liu I = 1 9 0/ √ 3 = 1 1 0A guo zai bao hu yi ban zheng ding bu xiao yu e ding dian liu de 1 . 1 bei , wo men qu 1 . 1 bei ze wei 1 2 1 A 。不同的电缆大小所能带的瓦数也是不同的，那么90kw用多大电缆呢？我们该如何选择电缆呢？今天小编就来给大家详细介绍下。
9 0k w dian ji , yi ban e ding dian liu shi 1 8 0an , mei gan wa an 2 an ji suan , shou xian zha kan dian ji qi dong fang shi , ru guo shi xing san jiao qi dong , dian lan yi ban you 3 5 x 3 ping fang tong xin jiu ke yi le , ta you liang gen 3 x 3 5 tong xin dian lan dao dian dong ji jie xian he , ru guo shi bian pin qi qi dong , jiu yong yi gen 3 x 7 0ping fang tong xin dian lan jiu ke yi le xing san jiao jiang ya qi dong fen wei zhu xian lu he kong zhi xian lu ，ru tu cong zhong jian qie kai ，zuo bian de shi zhu xian lu ，you bian shi kong zhi xian lu 。kong zhi xian lu kong zhi xian lu dian liu hen xiao ，ji hu sui bian yong duo da dian xian dou bu yong dan xin "
3+1电缆（直接启动或变频启动）35或50 两根YJV 3+1电缆（星三角启动）不要用铝芯线了，用铜线吧，同意此~~~ 根据题目我们先来计算电动机的额定电流： 电动机额定电压380V 功率因数取0.8 效率取90% 额定电流In=90/1.732*0.38*0.8*0.9A=190A 因为是星三角启动，电动机引来6根线， 角接是在外部完成，所以流过导线的电流是相电流三角形联接的负载线电流=√3相电流，所以相电流I=190/√3=110A 过载保护一般整定不小于额定电流的1.1倍,我们取1.1倍则为121A。
星三角降压启动分为主线路和控制线路，如图从中间切开，左边的是主线路，右边是控制线路。控制线路控制线路电流很小，几乎随便用多大电线都不用担心90kw电机，一般额定电流是180安，每干瓦按2安计算，首先查看电机启动方式，如果是星三角启动，电缆一般有35x3平方铜芯就可以了，它有两根3x35铜芯电缆到电动机接线盒，如果是变频器启动，就用一根3x70平方铜芯电缆就可以了
3 + 1 dian lan （zhi jie qi dong huo bian pin qi dong ）3 5 huo 5 0liang gen Y J V 3 + 1 dian lan （xing san jiao qi dong ）bu yao yong lv xin xian le ，yong tong xian ba ，tong yi ci ~ ~ ~ bu tong de dian lan da xiao suo neng dai de wa shu ye shi bu tong de ，na me 9 0k w yong duo da dian lan ne ？wo men gai ru he xuan ze dian lan ne ？jin tian xiao bian jiu lai gei da jia xiang xi jie shao xia 。