Question

The delta-delta connections are used in applications of ___________

(a) large l.v. transformers

(b) small h.v. transformers

(c) large h.v. transformers

(d) small l.v. transformers

I got this question in semester exam.

Query is from Three Phase Transformers in section Transformers of Electrical Machines

Answer 1

Correct answer is (a) large l.v. transformers

For explanation I would say: Delta connected winding handle line voltages so it needs more turns in the winding but thin wires.