INTERNATIONAL STANDARDS THAT WE ADHERE TO FOR PERFORMING INSTRUMENTATION EARTHING STUDIES

• IEEE 1100
  IEEE Recommended Practice for Powering and Grounding Electronic Equipment
• IEEE 1050
  Guide for Instrumentation and Control Equipment grounding in Generating Stations
• GP 12-65
  Guidance on Practice for Electromagnetic Compatibility
• GP 12-25
  Guidance on Practice for Grounding
• IEC 61000-5-2
  Electromagnetic Compatibility – Installation and Mitigation Guidelines – Grounding and Cabling
• BS-7430:2011
  Code of Practice for Protective Grounding of Electrical Installations
• DEP 33.64. 10.33-Gen.
  Electromagnetic Compatibility for Electrical and Electronics Systems
• IEEE 81-2012
  IEEE guide for Measuring Soil Resistivity, Ground Impedance, Earth Surface Potentials of the Grounding System.
• IEEE 142-2007
  Grounding of Industrial and Commercial Power Systems
• IEEE-519-2014
  IEEE Recommended Practice and Requirements for Harmonic Control in Electrical Power Systems
• GP 12 - 35
  Code of Practice for UPS and DC Power Supplies
• GP 12 - 10
  Code of Practice for Switch-gear and Control gear

KEY CHECK POINTS WE FOCUS ON DURING OUR INSTRUMENTATION AUDITS AND STUDIES TO ENHANCE RELIABILITY OF YOUR OPERATIONS

1. Mix-up between instrumentation and protective grounding system.
2. Grounding philosophy for IS and NIS systems.
3. Existing grounding scheme
4. Shields with high loop current
5. Electromagnetic interference on panels and field assets or instruments
6. Grounding of cable armour’s
7. Grounding unused cables
8. Effective grounding of panels, junction boxes and field assets or instruments.
9. Interconnection with different grounding systems.

KEY CHECK POINTS ACHIEVED BY PERFORMING INSTRUMENTAION GROUNDING STUDIES

1. Reduces unwanted trips
2. Reduces plant shutdown
3. Improves EMC
4. Prevents malfunction
5. Enhances safety and reliability
6. Equipotential bonding
7. Effective instrumentation grounding and its compliance to latest international standards