star delta how to connection

 The Star-Delta connection is used to reduce the starting current of an induction motor. Here's how to make a Star-Delta connection:

Step 1: Firstly, identify the six terminals of the three-phase induction motor. Three terminals belong to the motor winding and the other three belong to the power supply.

Step 2: Connect the three-phase power supply to the three terminals that belong to it.

Step 3: Connect the three terminals of the motor winding to a star (Y) connection. In this connection, the three terminals of the motor are connected together in the shape of a star.

Step 4: Next, connect a wire to the center of the star connection, which will serve as the neutral connection.

Step 5: Now, connect the other end of the three motor winding terminals to a delta (∆) connection. This connection is formed by connecting one end of a winding to the starting point of the other winding.

Step 6: Finally, connect the neutral wire from the star (Y) connection to the motor starter. The motor starter is then connected to the three-phase power supply.

Once the above steps are completed, the motor will start in a Star configuration, which reduces the starting current. Once the motor reaches a certain speed, the connection will switch to Delta, which provides higher torque and allows the motor to operate normally.