Like all raw materials and resources used in industrial processes — such as melting in a metalcasting operation — electricity needs to be managed and controlled in order to be useful and effective. “Harmonics”, i.e., the variety of voltages and currents that develop within an electric power system as a result of non-linear electric loads, can be a source of power-quality problems, and may result in increased heating in equipment and conductors, or failure in drives or ...

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