Using a soft starter with pole-changing motors [t-head2-col]

Soft starters can be connected in the supply line before pole-changing, → section Pole-changing motors.

Note

All changeovers (high/low speed) must take place at standstill.

The start signal must be issued only when a contact sequence has been selected and a start signal for pole-changing was set.

Control is comparable to cascade control with the difference that the changeover is made not to the next motor but to the other winding (TOR = top-of-ramp signal).