Question 258Electricity & Electronics - Assistant Engineer

The correct answer is B) series delta. In the series delta connection scheme, the windings of the three-phase motor are connected in a delta configuration, but the windings are connected in series rather than in parallel. This results in a lower speed operation of the motor compared to the parallel delta connection. The other options are incorrect because: A) Parallel delta would result in higher speed operation. C) Parallel wye would also result in higher speed operation. D) Series wye is a different configuration that would not achieve the low-speed operation shown in the diagram.