Equipment with high-powered motors or internal transformers designed to operate at 60 Hz may overheat at 50 Hz even if the voltage supplied is correct.
ɪkwˈɪpmənt wɪð hˈaɪpˈaʊɚd mˈoʊɾɚz ɔːɹ ɪntˈɜːnəl tɹænsfˈoːɹmɚz dɪzˈaɪnd tʊ ˈɑːpɚɹˌeɪt æt sˈɪksti ˌeɪtʃzˈiː mˈeɪ ˌoʊvɚhˈiːt æt fˈɪfti ˌeɪtʃzˈiː ˈiːvən ɪf ðə vˈoʊltɪdʒ səplˈaɪd ɪz kɚɹˈɛkt.