If a 60Hz induction motor is used in a 50Hz environment, it will spin **20% slower** and have **20% less horsepower**.
This also means that the load will be demanding less power.
However, a motor designed for 60Hz can be magnetically overloaded if running on 50Hz, which causes more current draw and more heat in the motor, leading to failure.
When a 50Hz single-phase motor is brought to 60Hz, the start function can be upset because the motor reaches the centrifugal switch speed **20% earlier** than normal.
When it does, the starting torque of the motor is suddenly reduced.
It could fail to speed up further and never reach normal running speed.