Specialised Engineering Services

Earthing & Grounding Study

Earthing , Grounding Study & Analysis

Software based system grounding & earthing foundation automatically detects the system earthing configuration based on source and transformer grounding or earthing type selection. The resulting earthing types are displayed both on the one line diagram and for the various connected cables.

Grounding System

  • Ungrounded
  • Solidly Grounded
  • Low Impedance Grounded (Low Z)
  • High Impedance Grounded (High Z)

BS 7671 lists five types of earthing system:

TN-S, TN-C-S, TT, TN-C, and IT.

  • T = Earth (from the French word Terre)
  • N = Neutral
  • S = Separate
  • C = Combinednt distortion evaluation (THD & IHD)
  • I = Isolated (The source of an IT system is either connected to earth through a deliberately introducedearthing impedance or is isolated from Earth.

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