[img]http://www.phy.ntnu.edu.tw/ntnujava/index.php?action=dlattach;topic=2137.0;attach=4045;image[/img]
V_{RS}=V_{12}=V_{RN}-V_{SN},   for root mean square value |V_{RS}|=\sqrt{3}|V_{RN}|
I_{10}=V_{RN}/R

[img]http://www.phy.ntnu.edu.tw/ntnujava/index.php?action=dlattach;topic=2137.0;attach=4047;image[/img]
V_{RS}=V_{12}=V_{RN}-V_{SN},   for root mean square value |V_{RS}|=\sqrt{3}|V_{RN}|

I_{12} =V_{RS}/R=(V_{RN}-V_{SN})/R,I_{23} =V_{ST}=(V_{SN}-V_{TN})/R, I_{31}= V_{TS}=(V_{TN}-V_{SN})/R
I_R=I_{12}-I_{31}= (V_{RN} -V_{SN})/R-(V_{TN}-V_{SN})/R =(2V_{RN} -V_{SN}-V_{TN})/R=3V_{RN}/R
V_{RN}+V_{SN}+V_{TN}=0, I_S=3V_{SN}/R, I_T=3V_{TN}/R

[img]http://www.phy.ntnu.edu.tw/ntnujava/index.php?action=dlattach;topic=2137.0;attach=4049;image[/img]
V_{12}=V_{RS}
I_{RS} =V_{RS}/(3R),I_{ST} =V_{ST}/(3R),I_{TR} =V_{TR}/(3R)
I_1=I_{10}=I_{RS}-I_{TR} root mean square |I_{10}|=\sqrt{3} |I_{RS}|
I_{12}=I_{10}-I_{20} root mean square |I_{12}|=\sqrt{3} |I_{10}|=3 |I_{RS}|=|V_{RS}|/R

[img]http://www.phy.ntnu.edu.tw/ntnujava/index.php?action=dlattach;topic=2137.0;attach=4051;image[/img]
V_{12}=V_{RS}
I_{RS} =V_{RS}/R,I_{ST} =V_{ST}/R,I_{TR} =V_{TR}/R
I_{1}=I_{RS}-I_{TR} root mean square |I_{1}|=\sqrt{3} |I_{RS}|
I_2=I_{ST}-I_{RS} , I_3=I_{TR}-I_{ST}