As shown in the two-speed single winding three phase motor connection diagrams illustrated in figure "B", what is the connection scheme associated with low speed operation? EL-0118

Correct Answer: Option B — series delta

Constant-horsepower or variable-torque multi-speed motors use reconnectable winding groups. Low-speed operation on Dahlander-type single-winding configurations typically utilizes a series delta connection to alter pole count and speed.