檢視三相三线的原始碼

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中文名称；三相三线

外文名称；Three-phase three wire system

电器；电视机、电冰箱

没有中性线；故称三相三线制

关系式；U线=根号3倍的U相
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在日常生活中，我们接触的负载，如电灯、[[电视机]]、电冰箱、电风扇等家用电器及单相电动机，它们工作时都是用两根导线接到电路中，都属于单相负载。在三相四线制供电时，多个单相负载应尽量均衡地分别接到三相电路中去，而不应把它们集中在三根电路中的一相电路里。如果三相电路中的每一根所接的负载的阻抗和性质都相同，就说三根电路中负载是对称的。在负载对称的条件下，因为各相电流间的位相彼此相差120°，所以，在每一时刻流过中线的[[电流]]之和为零，把中线去掉，用'''三相三线'''制供电是可以的。<ref>[https://wenku.baidu.com/view/a36f5f874935eefdc8d376eeaeaad1f347931130.html 三相三线制与三相线制],百度 , 2020年11月6日</ref>