描述
模拟地(AG),模拟地(又叫屏蔽地)是所有的接地中要求最高的一种。几乎所有的系统都提出AG一点接地,而且接地电阻小于IQ。DCS设计和制造中,在机柜内部都安置了AG汇流排或其它设施。用户在接线时将屏蔽线分别接到AG汇流排上,在机柜底部,用绝缘的铜辫连到一点,然后将各机柜的汇流点再用绝缘的铜辫或铜条以辐射状连到接地点。大多数的DCS要求,不仅各机柜AG对地电阻<I欧姆,而且各机柜之间的电阻也要<1欧姆。
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