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Earthing grounding audit


Evaluation of Existing Earthing System

DEW provides complete earthing audit for substations and industrial units using world class testing instruments and computer software from SES Technologies, Canada. Detailed analysis of incoming power and grounding integrity identifies distinctive problem locations and provides recommendations to enhance overall system performance.

 

Earthing Audit:

  • Earth Pit Testing
  • Soil Resistivity Testing
  • Mapping of Existing Earth Pit
  • Fault current carrying capacity of earthing strip and earthing grids
  • Validation of existing earthing system through earthing design software for:
  • Safety Compliance
  • Ground potential rise (GPR)
  • Touch voltage
  • Step voltage
  • Fault current discharged by the grid
  • Recommendations for optimum designing of earthing system

Why we need an advanced Earthing Audit?

  • Safety compliance as per IEEE ST-80, 2000
  • Smaller-area substations & higher fault levels
  • More prevalent use of sensitive electronic machines/equipment
  • Impact of transferred earth potentials needs to be mitigated