中国神运
三相电的标识，U、V、W称为三相，相与相之间的电压是线电压，电压为380V；相与中心线之间称为相电压，电压是220V。RST是Reset的意思，复位。/!--GOOGLE_AD_SECTION_END--
风中传音
A phase voltage (three-phase four-wire type) AB voltage (three-phase three-wire) A three-phase A photograph active power Total active power A phase of reactive power Total reactive power Total ShiZai power Power factor frequency Positive meritorious electric power Negative meritorious electric power Positive reactive power Negative reactive power 问题补充three-phasethree-wire ；line-to neutral(也可能被说成line to line), line to ground, neutral to groundfour wire three phase 万恶敬上 8
