# How to determine phase angle of a three-phase circuit

I am experiencing difficulties with a question:

A balanced three-phase load shown in the diagram is connected across a 380V, 50 Hz three-phase supply, ABC phase sequence. The voltage VAB is taken as reference.

Part of the question I am trying to answer includes converting the WYE circuit to a Delta circuit as I have done:

Now, my main question is how do I work out the phase angle of each component?
My textbook does not have notes on how to determine the phase angle. All they say is VBC is generally used as the reference phasor. But in this case, VAB is used as the reference phasor and I don't know how to determine the angles for the phasor diagram. I thought of rotating the reference diagram of VBC so that VAB = 0, VAC = 120 and VBC = 240. Would I be correct on this approach? Please advise

• can you please help me with my question? electronics.stackexchange.com/questions/161942/… its hard getting power system answers here, everyone talks electronics Mar 27, 2015 at 19:16
• @user2756746 - your question pictures are quite difficult to make out and it looks like you stopped half way thru - there is a "(" after the 1/3 and this doesn't instill confidence in the question. Mar 27, 2015 at 19:28
• @user2756746. I suggest you rewrite the question in HTML text (physically typing it out on your keyboard), diagrams and complex formulas should be in image format (neatly sketched) and lastly attempt the question fully to the best of your ability. The StackExchange policies are strict. Mar 29, 2015 at 19:24