Improving Control System Reliability by Proper Grounding System and Sound Engineering

QSWP of Saudi Aramco is the biggest Sea Water Injection Plant is the world. For process control and monitoring Delta V DCS System is used. One area of QSWP “Old Treatment Modules” had very high nuisance Equipment Trips. To resolve this problem a new Grounding system was constructed for each Treatment Module and 29 High Power Solenoids at each Module were replaced by Low Powered Solenoids. Solenoids were connected directly to Delta V - DO Cards. This resulted in reduced equipment trips. Saving of $ 635,000 per year was achieved by way of production loss avoidance and Man-hour saving.