Difference between star and delta connected motor

Star connected motors have a central connected point, called a short circuit point or star point and each winding receives phase voltages (230volts), star connected motor only run at one third of the motor rated torque and power, whereas delta connected motors have no connected point and each winding receives line voltages (415volts) and operates at full torque and power.

You also need to check the name of the motor, ascertain the operating voltage of the motor, some are 415v operating voltage and we can find there are 220v 3 phase operating voltage motors, Japanese standard. The input voltage to be considered, your input voltage, if it is 415v and motor operating voltage is also 415v, then you can connect either star or delta of the motor terminals. But, the motor operating voltage is 220v 3 phase, you can only connect on star if input voltage available is 415v 3 phase, but available input 220v 3 phase voltage motor operating voltage 220v 3 phase, delta connection is fine.