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# 三角形联结

把三相电源的正、负极依次联结，然后从三个联结点引出导线来，这种联结方式叫做三角形联结。

![](https://2889346953-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Le4Kw7maZEabKFjsC7z%2F-LfP6qH5Be5If0f2YPUW%2F-LfP71wKNvveYbXpPuw3%2FSanXiangDianSanJiaoXingLianJie.png?generation=1558437704691530\&alt=media)

很明显，此时 $$\dot U\_{AB} = \dot U\_{A}$$，$$\dot U\_{BC} = \dot U\_{B}$$，$$\dot U\_{CA} = \dot U\_{C}$$，$$线电压 = 相电压$$， 同时也继承了相电压的特性: 三个线电压合为零