Question 263Electricity & Electronics - Assistant Engineer

The correct answer is D) Motors "B" and "D" would have a counter-clockwise (CCW) rotation and motor "C" would have a clockwise (CW) rotation. The reasoning is that with the given 3-phase power source and A-B-C phase sequence, the motor connection in figure "A" results in a clockwise (CW) rotation. However, reversing the connection of any two phases of the 3-phase supply will reverse the rotation direction. In figures "B" and "D", the connections of two phases are reversed compared to figure "A", resulting in a counter-clockwise (CCW) rotation. In figure "C", only one phase connection is reversed, leading to a clockwise (CW) rotation. The other options are incorrect because they do not accurately describe the rotation direction of the motors in the different figures based on the given phase sequence and motor connections.