描述
屏蔽干扰源是抑制干扰的最有效地方法。通常变频器本身用铁壳屏蔽，不让其电磁干扰泄漏，输出线最好采用专用的屏蔽电缆或用钢管屏蔽，特别是以外部信号控制变频器时，要求信号线尽可能短(一般为20m以内)，且信号线采用对绞屏蔽，并与主电路的输入和输出线及控制线完全分离，决不能放于同一配管或线槽内，周围电子仪表、变送器等敏感装置的线路也要求屏蔽。为使屏蔽有效，屏蔽罩必须可靠接地。
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