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              新聞資訊
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              如何簡單檢查DCS系統接地?

              2021-02-16 15:42:12 來源:http://www.eboudy.com/ 53

              DCS接地是一個很復雜的問題,涉及到接地地點,接地方式,接地電阻大小等從現場到DCS機柜的諸多節點和環節。但日常對DCS的常規檢查主要有幾個方面:
              DCS grounding is a very complex problem, involving many nodes and links from the field to DCS cabinet, such as grounding point, grounding mode, grounding resistance, etc. However, there are several aspects in routine inspection of DCS
              1、DCS機柜應采用單點接地方式,檢查是否有可能導致多點接地的地方出現,比如機柜與槽鋼的接觸,接地點是否為單條引下線(線徑大于16mm2,長度小于30米)到地樁或地網,部件連接(或焊接)點是否良好(銹蝕)等。
              1. DCS cabinet shall adopt single point grounding method to check whether there are places that may lead to multi-point grounding, such as the contact between cabinet and channel steel, whether the grounding point is a single down lead (wire diameter is greater than 16mm2, length is less than 30m) to the ground pile or ground grid, and whether the connection (or welding) points of components are in good condition (corrosion).
              浙大中控DCS卡件
              2、檢查DCS接地點與電氣地或避雷針引下線接地是否共用,距離是否符合要求,一般情況要求DCS接地與電氣地距離15米以上,與避雷針接地點15米以上。
              2. Check whether the DCS grounding point is shared with the electrical ground or lightning rod down lead grounding, and whether the distance meets the requirements. Generally, the distance between the DCS grounding point and the electrical ground is more than 15m, and the distance between the DCS grounding point and the lightning rod grounding point is more than 15m.
              3、測量DCS系統接地電阻是否小于4歐姆。接地電阻的大小與
              3. Measure whether the grounding resistance of DCS system is less than 4 ohm. The size of grounding resistance and
              很多因素相關,如接觸良好,土壤濕度,導電率等,測量接地電阻可選用的儀器有搖表、鉗形表等。
              Many factors are related, such as good contact, soil moisture, conductivity, etc. the instruments available for measuring grounding resistance are megger, clamp meter, etc.
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