In a Delta connection, three coils are connected in what shape?

• A. Triangle
• B. Star
• C. Line
• D. Series chain

Answer: (A)

In a delta connection, the three coils are tied end-to-end to form a closed loop, so they physically create a triangle. Each coil represents one side of that triangle, and the three external line leads connect to the triangle’s three corners. That triangular arrangement is why this configuration is called a delta. By contrast, a star (wye) connection has all windings meeting at a common neutral point, forming a star shape with line leads at the outer ends. In terms of electrical behavior, delta gives the line voltage directly across each winding (line voltage equals winding voltage) while the line current is √3 times the winding current, with the opposite relationships in a star connection.