Scott connections are used for

• A. Single-phase to three-phase transformation
• B. Three Phase to Single Phase transformation
• C. Any of the above
• D. Three-phase to two-phase transformation

Answer: (D)

SCOTT CONNECTION
The Scott connection is used to convert three-phase power into two-phase power into two single-phase transformers. The Scott connection is very similar to the T connection that one transformer, called the main transformer, must have a center or 50% tap, and t second or teaser transformer must have an 86.6% tap on the primary side. The difference between the Scott and T connections lies in the connection of the secondary winding (Figure). In the Scott connection, the secondary windings of each transformer provide the phases of a two-phase system. The voltages of the secondary windings are 90° out of phase with each other. The Scott connection is generally used to provide two-phase power for the operation of two-phase motors.