Earyhing

Definition:The method of connecting noncurrent carrying parts of the electrical equipment or the neutral point of the supply system to the earth through the wire having negligible resistance is called electrical earthing. Earthing protects the electrical equipment from lightning strokes and earth fault conditions. It provides the easiest path to the fault or leakage current to flow through it.

There are five types of neutral earthing:

• Solid-earthed neutral.
• Unearthed neutral.
• Resistance-earthed neutral. Low-resistance earthing. High-resistance earthing.
• Reactance-earthed neutral.
• Using earthing transformers (such as the Zigzag transformer)