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Matters needing attention when instruments and meters are grounded

by:Sure     2021-08-22
After the instrumentation is installed, proper grounding can reduce the occurrence of unnecessary accidents in the automation and control system. Here are some tips for grounding instruments and meters, which can help you better ground. 1. The AC power supply of the control system should come from a separate system, separate from other equipment and use; 2. The power supply should be designed with the impact of the initial current in mind. After the instrumentation is installed, the correct grounding can reduce the automation and control system. The occurrence of unnecessary accidents. Here are some tips for grounding instruments and meters, which can help you better ground. 1. The AC power supply of the control system should come from a separate system, separate from other equipment and use;    2. The power supply should be designed with the impact of the initial current in mind and can withstand at least 10 cycles;    3. The AC grounding of the control system should be established On the isolation transformer or UPS, or nearby;   4, the AC power supply of the control system workstation should use a special socket;   5, when connecting the field equipment power supply several I/O interface adapters, the isolation barrier should be used; 6. The AC power supply of the control system should be supplied by an isolation transformer or UPS;   7. When the AC and DC inputs are connected to the same wiring block, the wiring block must be marked with an appropriate warning label;    8. The AC grounding wire should be the same or larger than the current-carrying wire Number one;    9. Reserve an extra line or use a terminal box to provide test points.  10. The resistance of the grounding system must be tested to ensure that the grounding can meet the requirements of the control system manufacturer. Electromagnetic wave tester | Relay protection tester | Loop impedance tester | Multifunctional tester.
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