Can you run a 380v 3-ph 50 Hz motor on a 460v 3-ph 60hs supply?

Answer 1

You have to reduce the voltage by a factor 50/60 to avoid saturation in the active iron of the motor. Accordingly the available max load of the motor is reduced by (50/60)^2. Nevertheless the actual load of the motor is defind by the requirements of the driven machine (pump, elevator, etc). The nominal speed of the motor is reducet too.

Answer 2

The 10 Hz isn't going to hurt it, only make it spin a bit faster. but I'd be worried about the 80 volt hike in tension. That's about a 20% overvoltage which the motor might not be able to stand for longer durations.