Typical zero sequence data for 80MVA transformer
usually the 132/33kv transformers have a Y / D connection and th LV side is resistance grounded through zig-zag transformer and so they have a moderate zero sequense impedance.
but some tests show that,

The zero-sequence impedance is usually given as a percentage of the rated phase impedance.
When the transformer has a three-limb core and no delta-connecter windings, the zero-sequence impedance is about 30...60 %. When the transformer has a delta-connected winding, the zero-sequence impedance is 0.8...1.0 times the corresponding short-circuit impedance (uk%).

(from Testing of Power Transformer – Measurement of Zero-Sequence Impedance)