In electric motors, Star-Triangle starter is an indirect starter type and can be used when the motor torque curve is satisfactorily high to ensure the speed of the machine with the reduced current. This happens in three-phase induction motors applied on circular saws, lathes or compressors that must start with open valves. The Star-Triangle match, as its name says, will start its triggering method always by the Star connection, and after a certain time, the winding connection goes to the Triangle type.

In the star connection, the starting current is reduced to 25 to 30% of the direct starting current. The essential condition for starting with the Star-Triangle switch is the possibility of connecting the three-phase double-voltage induction electric motor where to find skf bearing, ie 220 / 380V, 380 / 660V or 440 / 760V. It is also essential that the motors have at least six terminals for electrical connections with the natural supply network of the starting system, as it receives the three phases of the supply network and sends six conductors for its output.