I’ve noticed an increase in requests for operating stock U.S. rotary electric (motor) vibrators that are wound for 460/3/60 power overseas where the power is often 380/3/50. The answer to the question is yes and there are two options available.
First, is the realization that you can operate a 460/3/60 vibrator using 380/3/50 power. My understanding is that the reason it works is due to de-rating the higher voltage 60 Hz motor since 50 Hz power rotates the eccentric weights at a lower RPM (rotations per minute) by a factor of 50/60. For example, an 1800 RPM vibrator would run at 50/60 x 1800 = 1500 RPM.
This same logic can also be applied to the voltage. So, a 460 volt motor would be de-rated to 383 volts by multiplying the 60 Hz voltage by the same factor of 50/60. Therefore, due to 50Hz input, a 60Hz vibrator will accept 380 volts ± 10% without jeopardizing the motor.