Difference points of Earthing and grounding.pdf
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The document discusses the importance of earthing and grounding in electrical systems, highlighting their roles in minimizing electric shock risks and providing effective return paths. It outlines different types of earthing connections, such as plate, rod, and strip earthing, along with their functions in protecting equipment and enhancing system stability. It also distinguishes between earthing (for safety against leakage currents) and grounding (for protection of power system equipment).
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Difference points of Earthing and grounding.pdf
- 1. under nomal condition)to he earth for example clectrical equipment's frames, enclosures, supportsetc. It is equipment earthing. The purpose ofearthing is to minimize risk of receiving an electric shock if touching metal parts when a lcakage current is present. Earthing is an allernatc low resistance path for Grounding is a sourcc for unwanted leakage current. EEarthing connectionsare of four types: Plate earthing Pipe carthing current under nommal condition) to the earth or example neutral oftransformer. Thepurposeofcarthing is to minimize risk of It is provided for climinating arcing receiving an electric shock to human. Generally Green wire is used for this as a nomenclature. Rod earthing Strip earthing It is source or syslem earthing Itis nothing to dowith the system stability. It does notprovide any means for protection systen againstcarth faut. currents and also as a retum path for main currentfor protection ofdelicate cquipments. Grounding is done for the protections of power system equipment and to provide an effective return path. ground and over volage surge. Generally Black wire is used for this as a nomenclature. E Grounding connections are ofthree Lypes: Solid earthing Resistance earthing Reactance earthing I ncreases stab:lity ofthesystem. This arnhing providessuitablemeans for arlh uli protecting sslem. tr W ins