In this paper,the author first analyzes the causes and harms of the overload problems of har-monic current in electrical device.Then,through examples,he proposes the methods of wire sec-tion and protection measures taken in actual use under the situation of circuit overload.%就实际使用的电气装置中存在的大量谐波电流问题,分析了其产生的原因,及造成的危害,通过实例说明了在谐波电流引起过载的情况下选择导线截面的方法及实际使用中来取的保护措施。
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