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如何简单检查DCS系统接地?

2021-02-16 15:42:12 来源:http://www.sdjkyqyb.com/ 53

DCS接地是一个很复杂的问题,涉及到接地地点,接地方式,接地电阻大小等从现场到DCS机柜的诸多节点和环节。但日常对DCS的常规检查主要有几个方面:
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机柜应采用单点接地方式,检查是否有可能导致多点接地的地方出现,比如机柜与槽钢的接触,接地点是否为单条引下线(线径大于16mm2,长度小于30米)到地桩或地网,部件连接(或焊接)点是否良好(锈蚀)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、检查DCS接地点与电气地或避雷针引下线接地是否共用,距离是否符合要求,一般情况要求DCS接地与电气地距离15米以上,与避雷针接地点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、测量DCS系统接地电阻是否小于4欧姆。接地电阻的大小与
3. Measure whether the grounding resistance of DCS system is less than 4 ohm. The size of grounding resistance and
很多因素相关,如接触良好,土壤湿度,导电率等,测量接地电阻可选用的仪器有摇表、钳形表等。
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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