YnDyn0 vs Dzno, advantages and disadvantages
YnDyn0 vs Dzno, advantages and disadvantages
(OP)
Dear all.
We have two options for replace a old transformers YnDyn0.
by same new or by Dzn0.
Dzn0 is cheaper, but we do not have any experience with such transformer.
Please share your experience in this case.
Thanks in advance.
We have two options for replace a old transformers YnDyn0.
by same new or by Dzn0.
Dzn0 is cheaper, but we do not have any experience with such transformer.
Please share your experience in this case.
Thanks in advance.






RE: YnDyn0 vs Dzno, advantages and disadvantages
RE: YnDyn0 vs Dzno, advantages and disadvantages
6.6kV factory generation bus- co-generation with grid, 3.3kV factory small distribution bus with additional generation.
RE: YnDyn0 vs Dzno, advantages and disadvantages
RE: YnDyn0 vs Dzno, advantages and disadvantages
RE: YnDyn0 vs Dzno, advantages and disadvantages
Further, in the calculations above, the amount of copper used for YNyn0d11 ic clear. But the amount of copper used in a DZn0 is not Can you please explain why there are 2 0.585M in a 2 winding transformer?
RE: YnDyn0 vs Dzno, advantages and disadvantages
RE: YnDyn0 vs Dzno, advantages and disadvantages
RE: YnDyn0 vs Dzno, advantages and disadvantages
RE: YnDyn0 vs Dzno, advantages and disadvantages
It seems in early days of electric power transmission,to use Ynzn was usual to save on the stabilising tertiary winding ie use Ynzn instead of YNynd11.Advantage is that zn will serve the purpose of a delta in reducing the zero sequence impedance,but with a small saving in copper. Any LG fault in secondary of such transformers will be seen as L_L fault on primary so that maltripings on primary will be avoided, Even today in such regions YNzn transformers are being procured (quite large 100-125 MVA)eg.Mumbai (India), Bangladesh and certain South American countries.
RE: YnDyn0 vs Dzno, advantages and disadvantages
maybe with 2:1 voltage levels, it will be cost effective solution.
RE: YnDyn0 vs Dzno, advantages and disadvantages
step down transformer are 230/69kV or 138/69kV YNd