Question

a double-delta connection is a method of wiring transformers where both sets of secondary windings are connected in a delta connection, but one is reversed with respect to the other. T/F

Answer 1

True. In a double-delta connection, two delta-connected transformers are employed with their secondaries interconnected in a closed loop. However, the connection of one of the transformers is reversed with respect to the other, resulting in a double-delta connection. This configuration is typically used for voltage step-up applications, where the primary windings are connected to lower voltage sources. It is also commonly used in power systems where voltage regulation is crucial. With a double-delta connection, the secondary voltages can be easily adjusted by changing the primary voltage.