- #1
Guineafowl
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- TL;DR Summary
- How to derive the voltages seen in a three phase, Y connected transformer.
Assume a transformer as above, with 230V L-N, and I want to work out the L-L voltage. A phasor diagram will show me that the voltages are 120° out of phase.
(230∠0°) + (230∠120°) = (230cos0 + j230sin0) + (230cos120 + j230sin120) = 230 + (-115 + j199.2)
115 + j199.2 = 230∠60
What I’m looking for is, of course, 400V. I know √3 is involved, but how, and is that an exact calculation or a useful rule of thumb?
This is not homework.
(230∠0°) + (230∠120°) = (230cos0 + j230sin0) + (230cos120 + j230sin120) = 230 + (-115 + j199.2)
115 + j199.2 = 230∠60
What I’m looking for is, of course, 400V. I know √3 is involved, but how, and is that an exact calculation or a useful rule of thumb?
This is not homework.