According to the information provided, you should be able to connect 220 volts to one phase wire of a 380 volt system, if a neutral is available. However, please note that instructions may vary, and one type of connection may not be allowed. I am confused about what you are trying to do.
As stated above, you can take a 380v, 3 phase star connected motor and run it as a 220v, three phase delta connected motor. Going back to basics it is the current driven by the voltage that creates the flux. The flux density (dependent on many things) is a function of the current and voltage.
If the motor is designed to run in star a 380V 3-phase power supply, then it cannot be connected in delta on the ''same'' supply. That would be the equivalent of applying 380 volt to 220v windings so clearly the motor would fail.
Unless you can re-connect the motor for 220 volt operation, you will need a transformer to step the voltage up to 380 volts and capacitor rated for 380 volts. The reconnection must be done with wires that are not now coming out of the motor. I will try to post a sketch. Thanks, i understand one more banal question really.
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