For the protection of a delta-star transformer using differential protection scheme, which of the following CT connection is used?

For the protection of a delta-star transformer using differential prot

1.	For the protection of a delta-star transformer using differential protection scheme, which of the following CT connection is used?
A.	Primary Star, Secondary Star
B.	Primary Delta, Secondary Star
C.	Primary Star, Secondary Delta
D.	Primary Delta, Secondary Delta
Answer» D. Primary Delta, Secondary Delta