* Insufficient Torque and Power: The motor will receive significantly less voltage than it's designed for, resulting in reduced torque and power output. It may not be able to start or carry its rated load.
* Overheating: The motor will draw more current to compensate for the lower voltage, leading to overheating and potential damage to the windings. This could shorten its lifespan considerably or even cause a fire.
* Reduced Efficiency: The motor will operate inefficiently at the lower voltage, wasting energy and increasing operating costs.
* Possible Damage to Motor Components: The reduced voltage might cause damage to internal components over time.
To use a 480-volt motor, you need a 480-volt power supply. Using a transformer to step up the voltage from 380V to 480V would be necessary, but ensure the transformer is appropriately sized and rated for the motor's power requirements. This should only be done by a qualified electrician.