zero sequence zig-zag star Transformer

[seifi]

HI

according to attach file , If earth fault occurs at point A , what will the equivalent circuit of the positive, negative, and zero sequences look like?

Thanks seifi

https://files.engineering.com/getfile.aspx?folder=c1f3c804-443b-4789-b045-f3de42d68add&file=sld.jpeg

 

[Kiribanda]

It looks like there is an error in the SLD. Per the dwg given, you have connected a 150kVA, Zig Zag transformer
with a primary voltage of 33kV to your 400V DELTA system which is the output of 30MVA, 132-0.4kV main transformer?
How it could be?

 

[EddyWirbelstrom]

150MVA, ZNyn11 Interconnected Star-Star Transformer
Is the zig-zag winding phase/phase voltage 400V ?
Is the star winding phase/phase voltage 132 kV ?
Are both star points solidly earthed ?