Why CRGO core is used in transformers?

Transformer cores are frequently constructed using CRGO silicon steel. Transformers made of CRGO steel have a low magnetizing current requirement. We would require a specific amount of magnetizing power to create flux in the core (i.e., magnetize the core) if non-oriented steel was employed. The magnetizing force ought to be strong enough to bring domains with axes that are widely offset from the applied field axis into alignment with (i.e., parallel to) the applied field axis.

oriented with grain sheets The domains are not much out of alignment, and just a weak magnetic field is needed to magnetize the core. This explains why CRGO steel-using transformers have a very low magnetizing current.

It is crucial to remember that Care must be taken when utilizing CRGO steel to construct transformer cores such that the crystal direction is parallel to the flux route; otherwise, the core will offer high reluctance (low permeability rather than high permeability).