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Home / Technical Articles / Earthing In a Nutshell (Classification, Isolated Neutral, Methods Of Neutral Grounding)

Earthing (or Grounding) Term

The term earthing or grounding means connecting the non-current-carrying parts of the electrical equipment or the neutral point of the supply system to the general mass of earth in such a manner that all times an immediate discharge of electrical energy takes place without danger.

Earthing In a Nutshell (Classification, Isolated Neutral, Methods Of Neutral Grounding)
Earthing In a Nutshell (Classification, Isolated Neutral, Methods Of Neutral Grounding) - on photo: Arc Suppression Coil; credit: swedishneutral.se

The neutral grounding is an important aspect of power system design because the performance of the system in terms of short circuits, stability, protection, etc., is greatly affected by the condition of the neutral.

Contents:

  1. Objects Of Earthing
  2. Classification Of Earthing
    1. Equipment Grounding
        1. Ungrounded enclosure
        2. Enclosure connected to neutral wire
        3. Ground wire connected to enclosure
    2. System Grounding
  3. Isolated Neutral Or Undergrounded Neutral
    1. Circuit Behavior Under Single-Line-to-ground Fault
  4. Advantages Of Neutral Grounding
  5. Methods Of Neutral Grounding
    1. Solid Grounding
    2. Resistance Grounding
    3. Reactance Grounding
    4. Arc Suppression Coil Grounding (Or Resonant Grounding)

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Edvard Csanyi

Electrical engineer, programmer and founder of EEP. Highly specialized for design of LV/MV switchgears and LV high power busbar trunking (<6300A) in power substations, commercial buildings and industry facilities. Professional in AutoCAD programming.

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