- #1
Guineafowl
- 907
- 415
- TL;DR
- Can someone please explain the phase angle and group of these two Dy transformer diagrams?
On behalf of someone on another forum; In both cases, he’s been given the answer, but doesn’t understand it:
To me, the group does make sense in both cases, if you imagine the diagrams rotating anticlockwise: the vector X1 lags by 30° in the first case, giving 11 o’clock as the group, and leads by 30° in the second, giving 1 o’clock.
I’m stumped by the phase, as he is. I think it might be to do with the fact that the top delta is clockwise, and the bottom the opposite.
Original thread: https://www.mig-welding.co.uk/forum...ransformer-phase-displacement-symbols.148438/
To me, the group does make sense in both cases, if you imagine the diagrams rotating anticlockwise: the vector X1 lags by 30° in the first case, giving 11 o’clock as the group, and leads by 30° in the second, giving 1 o’clock.
I’m stumped by the phase, as he is. I think it might be to do with the fact that the top delta is clockwise, and the bottom the opposite.
Original thread: https://www.mig-welding.co.uk/forum...ransformer-phase-displacement-symbols.148438/