SIR I REQUEST HOW THE ANSWER HAS BEEN DERIVED IN THIS PROBLEM 13. THOUGH I GOT A REPLY FOR Q12 BUT NOT ABLE TO UNDERSTAND Q13 BECAUSE IN THIS WE HAVE 3 VECTORS. HOW TO CALCULATE IT IF THERE ARE 3 VECTORS.

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Okay, reposting a new thread in caps isn't going to help you anymore than replying in the original. Giving someone an answer doesn't actually help them. Then, explaining the answer fully doesn't help much either.

My original reply to 13 was:

Question 13 asks "how much voltage would be measured between any two open wires?"

So, there are 3 pole pairs, thus 360/(3*2) spacing between phases, or 60 degrees. Use trig. to solve for the resultant vector.

Steve

I pointed out that the voltage was between two phases. Secondly, I gave you the angle of the vector. All you need is basic trig to solve the question.

Steve