Why Does a Device Draw Less Power on 60Hz Grids Compared to 50Hz Grids?

Hello everyone!

I recently joined electric engeniering world and I have a question regarding power in 50hz and 60hz grid systems...
Why does the power (and, therefore, the current) that a device consumes from grid, be lower in 60hz power grids than the power it consumes in 50hz power grids?? See attached file

Thanks a lot!

Alejandro

Alejandro,

You are mistaken. The power is not lower in 60 Hz power grids -- which is to say, it is not always lower. It depends on the load device's impedance versus frequency. If the real part of its impedance rises with frequency, then at the same voltage, power would be lower at 60 Hz than at 50 Hz. If the impedance falls with frequency, then it is the opposite. If the device is purely resistive so that its impedance is the same, then the power would be the same too.

Didn't see your attached file.

As it happens, most 50 Hz power grids use a higher voltage than 60 Hz power grids, so that alone tends to make the power consumed by the load lesser when used in a country that has a 60 Hz grid. But that is by chance.