difference between delta - delta and star delta transformer

Question

Accepted Answer

Delta-delta and star-delta transformers are two different configurations used in power distribution systems.

Delta-delta transformer has all three windings connected in delta configuration, providing isolation and no phase shift.
Star-delta transformer has primary winding connected in star configuration and secondary winding in delta configuration, used for step-up applications.
Delta-delta transformer is used for distribution systems with balanced loads, while star-delta transformer is used for high voltage transmission lines.
Delta-delta transformer is more expensive but provides better performance in terms of voltage regulation and efficiency.
Star-delta transformer is more commonly used due to its cost-effectiveness and versatility in various applications.

Top Gulati Auto Electricals Graduate Engineer Trainee (Get) interview questions & answers