Is it not correct that electronic devices in the US are typically 60 Hz, and 50 in Europe? Is so, I wonder about one thing; when talking about "normal" electronic appliances that you would have in your house, I always believed that something made for 60 Hz wouldn't work at all if you were on a 50 Hz grid. My company often installs pumps with frequency changers built in. These pumps apparently have their speed regulated by this frequency changer. Would it also then be true that an appliance or whatever made for 60 Hz would just run "slower" if it was to be connected to a 50 Hz grid??