1. Which pole-changing motors are offered?

There are two variants here, the motor with a Dahlander connection and the motor with two separate windings.

The Dahlander motor is a two-speed motor that offers 1:2 switching (example 2:4, 4:8 or 6:12 etc.). Only one winding is used, which enables two different circuits in the terminal box for the individual speeds. The two connection types ∆/ΥΥ (triangle / double star) and Υ/ΥΥ (star / double star) are common for a Dahlander circuit.

With the electric motor with two separate windings, different speed ratios are possible. Pole-changing motors with two separate windings are available, for example, in 4/6-pole, 6/8-pole, etc. The switching types include ∆/∆ (delta/delta), Υ/Υ (star/star), ∆/Υ  (delta/star) for use.