Zig Zag Transformer

It does rather depend upon the design and construction skills of the <...we...>, nothing of which has been revealed to the forum.

If you have nothing to add, why not refrain?

It looks like it might be possible with three (3) single-phase, 1:1 ratio transformers, if you properly connect the terminals. See the following:

Zigzag Transformer

The challenge may be finding transformers of the correct rating and ratio.

What are you trying to accomplish?

we use zigzag for providing low impedance path to zero sequence current only. where during earth fault when 0 seq curernt appears to three terminals they flow in such a manner that, direction of current in two part of winding in one LIMB is in opposition

in a earthing transformer there is no existance of secondary winding..........so if use 6 single ph Tr. then what about 2ndary of each 1phase Tr..............remember the most vital thing in each phase the winding have 2 part winded in opposite form on the same lime............by using 6 single ph how u can do that?