two speed async motors check
two speed async motors check
(OP)
Dear all,
I would like to check on site whether an old 2-speed async motor has two separate windings or a Dahlander winding. Chances are for Dahlander, since the speed ratio is 1:2, only horsepower does not fit since it is labeled 3.5/6 kW.
If I disconnect cables and measure the resistance between one terminal of group 1 and any other of group 2, if it is two separate windings I should read at least some kiloohms -am I right?
Thank you very much.
I would like to check on site whether an old 2-speed async motor has two separate windings or a Dahlander winding. Chances are for Dahlander, since the speed ratio is 1:2, only horsepower does not fit since it is labeled 3.5/6 kW.
If I disconnect cables and measure the resistance between one terminal of group 1 and any other of group 2, if it is two separate windings I should read at least some kiloohms -am I right?
Thank you very much.





RE: two speed async motors check
But you are right, the 2-winding motor should have 2 windings with a decently high impedance so you should see a high resistance between the different windings. A 1-winding motor will have low to almost shorted impedance between all the terminals.
RE: two speed async motors check