Your PC screen flickers, stops flickering, starts again... Irritating to be sure, and perhaps the first visible sign of a problem - higher-order harmonics - that is growing more common as industry and commerce add more power electronics equipment and computers, not to mention fluorescent lighting, to their electrical load inventory. At the same time, the proliferation of electronic equipment in the workplace puts a question mark against something commerce and industry have come to expect and demand - high power quality.
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