## Thursday, September 7, 2023

star triangle starting diagram 1 direction of travel

1st stage:_ The windings are star-coupled, the voltage is reduced across each winding.

2nd step: Removal of the star coupling then (after time delay) the motor windings are coupled in a triangle, each winding is now subjected to the network voltage.

An asynchronous motor has a high torque and can absorb 4 to 8 times its nominal current on start-up, which risks causing disturbances on the electrical network, voltage drop, tripping of protection.

To reduce this current draw, a simple and financially attractive process is used, star/delta starting, because 3 power contactors and a simple remote control are enough to operate.

This process can only be applied to motors whose delta coupling corresponds to the network voltage U,

Functioning:

1st stage: The windings are star-coupled, the voltage is reduced across each winding.

2nd step: Removal of the star coupling then (after time delay) the motor windings are coupled in a triangle, each winding is now subjected to the network voltage.

star triangle starting diagram 1 direction of travel

1st stage:_ The windings are star-coupled, the voltage is reduced across each winding.

2nd step: Removal of the star coupling then (after time delay) the motor windings are coupled in a triangle, each winding is now subjected to the network voltage.

An asynchronous motor has a high torque and can absorb 4 to 8 times its nominal current on start-up, which risks causing disturbances on the electrical network, voltage drop, tripping of protection.

To reduce this current draw, a simple and financially attractive process is used, star/delta starting, because 3 power contactors and a simple remote control are enough to operate.

This process can only be applied to motors whose delta coupling corresponds to the network voltage U,

Functioning:

1st stage: The windings are star-coupled, the voltage is reduced across each winding.

2nd step: Removal of the star coupling then (after time delay) the motor windings are coupled in a triangle, each winding is now subjected to the network voltage.