|转至：技成培训
如何判断三相不平衡？
一是测三相线电流，三相线电流相等就说明三相平衡，三相线电流不相等，就说明三相不平衡，而且最大一相线电流与最小一相线电流差值越大，说明三相不平衡程度越严重。
二是测中性线（零线）电流，三相平衡的话，中性线无电流，中性线有电流就说明三相不平衡，中性线电流越大说明三相不平衡程度越严重。
三相不平衡时，要分别测主干线、次干线、分支线上的三相线电流，掌握各级线段上的不平衡程度，为处理三相不平衡提供依据。
主要是单相负载在三相线上分配不均。
重新分配各相上的单相负载，在分支线的配电箱或三级配电箱处，总之是可以分配单相负载的配电箱处或连接处，先测出三相线电流，然后把最大线电流一相上的负载，分出一部分接到最小线电流那一相上，尽可能使三相线电流差不多大。
然后在上一级配电箱（二级箱）处，测三相线电流的平衡程度，是否应下一级很小的三相不平衡度，累加成了很大的三相不平衡度。例如下级分支线上都是A相比B相大10安培左右电流，由于多条分支线都是这种情况，结果在上一级累加成A相比B相大几十安培。这就有必要在部分分支线上再适当调整，使最大电流出现在不同相上，到上一级汇集后使不平衡度降低。
总的要达到的效果是，从三级配电箱至二级配电箱再到一级配电箱，三相平衡程度要逐级提高，而不是逐级减小。
专栏：行业资讯
作者：
行业资讯
来源：
行业资讯
{"weixin":{"label":"微信","name":"weixin","selected":true,"value":true,"sortid":"1","shareid":"weixin","sharetitle":"分享到微信","event":"shareToWeiXin","lang":"shareWeb_WeiXin"},"copy":{"label":"复制网址","name":"copy","selected":true,"value":true,"sortid":"2","shareid":"copy","sharetitle":"复制网址","event":"copy_url","lang":"shareWeb_Copy"},"qq":{"label":"QQ好友","name":"qq","selected":true,"value":false,"sortid":"2","shareid":"qq","sharetitle":"分享到QQ","event":"shareToQQ","lang":"shareWeb_QQ"},"sina_weibo":{"label":"新浪微博","name":"sina_weibo","selected":true,"value":true,"sortid":"4","shareid":"sina_weibo","sharetitle":"分享到新浪微博","event":"shareToSinaWB","lang":"shareWeb_SinaWeiBo"},"qq_zone":{"label":"QQ空间","name":"qq_zone","selected":true,"value":true,"sortid":"5","shareid":"qq_zone","sharetitle":"分享到QQ空间","event":"shareToQzone","lang":"shareWeb_QQZone"},"renren":{"label":"人人网","name":"renren","selected":true,"value":false,"sortid":"7","shareid":"renren","sharetitle":"分享到人人网","event":"shareToRenren","lang":"shareWeb_RenRen"},"douban":{"label":"豆瓣网","name":"douban","selected":true,"value":true,"sortid":"8","shareid":"douban","sharetitle":"分享到豆瓣网","event":"shareToDouban","lang":"shareWeb_DouBan"},"baidu_tieba":{"label":"百度贴吧","name":"baidu_tieba","selected":true,"value":true,"sortid":"10","shareid":"baidu_tieba","sharetitle":"分享到百度贴吧","event":"shareToTieba","lang":"shareWeb_TieBa"},"Facebook":{"label":"Facebook","name":"Facebook","selected":true,"value":false,"sortid":"11","shareid":"Facebook","sharetitle":"分享到FaceBook","event":"shareToFacebook","lang":"shareWeb_Facebook"},"Twitter":{"label":"Twitter","name":"Twitter","selected":true,"value":false,"sortid":"12","shareid":"Twitter","sharetitle":"分享到Twitter","event":"shareToTwitter","lang":"shareWeb_Twitter"},"LinkedIn":{"label":"LinkedIn","name":"LinkedIn","selected":true,"value":false,"sortid":"13","shareid":"LinkedIn","sharetitle":"分享到linkedIn","event":"shareToLinkedin","lang":"shareWeb_Linkedin"},"whatsapp":{"label":"whatsapp","name":"whatsapp","selected":true,"value":false,"sortid":"15","shareid":"whatsapp","sharetitle":"分享到whatsapp","event":"shareToWhatsapp","lang":"shareWeb_whatsapp"},"line":{"label":"line","name":"line","selected":true,"value":false,"sortid":"15","shareid":"line","sharetitle":"分享到line","event":"shareToLine","lang":"shareWeb_line"},"qq_weibo":{"label":"腾讯微博","name":"qq_weibo","selected":true,"value":true,"sortid":"3","shareid":"qq_weibo","sharetitle":"分享到腾讯微博","event":"shareToQQwb","lang":"shareWeb_QQWeiBo"},"peopleBlog":{"label":"人民微博","name":"propleBlog","selected":true,"value":true,"sortid":"14","shareid":"propleBlog","sharetitle":"分享到人民微博","event":"shareToPeopleBlog","lang":"shareWeb_peopleBlog"}}