It is always preferred to ground the neutral point of the Star connected winding of the trfr . The grounding eliminates the Unbbalanced voltage ( and current ) . In the cases of fault or unbalanced load , the neutral will see the unbalanced current . If the neutral is not earhed , then there will be Neutralshifting causing Unbalanced pahse current and the effect will be cascading . Aslo , the protection CT are mounted on the Neutral . If neutral is not provided , then those Ct and their associated functions will cease to function.