8 Steps of Substation Earthing Design - Explained with Substation Earthing Calculations ⚡

Published 2023-09-29

Welcome to another insightful video by Axis Electrical. Today, we delve deep into the design of Substation Earthing, covering Substation Earthing Design Parameters, Substation Earthing Calculation and mitigation strategies in detail.

In this video, you will learn:
• How Substation Earthing Works
• Steps for Designing Substation Earthing
• Mitigation Strategies for Substation Earthing

The primary role of Substation Earthing is to dissipate short-circuit current into the earth without causing damage, limit the potential gradient, and maintain step and touch voltages within safe values. The system combines Horizontal Conductors and Vertical Electrodes, connected to non-current carrying metallic parts and neutral points of transformers and generators.

This video is made referring to the following Standards:
• IEEE 80: Guide for Safety in AC Substation Grounding
• IS 3043: Code of Practice for Earthing
• BS 7430: Code of Practice for Earthing

We have explained 8 Crucial Steps of Designing Substation Earthing, watch our video to understand these steps in detail.
1. Soil Resistivity Test: Utilizes the Wenner four-pin method to measure soil resistivity.
2. Fault Current: Determines conductor sizing and overall earthing design.
3. Conductor Sizing for Earth Mat: Based on fault current and soil resistivity.
4. Quantity & Length of Earth Electrode: Determined by Soil Resistivity Test and Fault Current Data.
5. Mesh Size for Grounding Grid: Calculated based on resistivity and fault current.
6. Calculating Touch & Step Potential: These potentials are calculated and compared for safety.
✅ Blog link: axis-india.com/touch-and-step-potential-requiremen…
7. Calculating Ground Potential Rise (GPR): GPR = Ig x Rg
8. Measurement of Grid Impedance: Estimated using the formula for a circular metal plate at zero depth.

Why Axis Electricals? At Axis, we have a team of 40+ engineers who specialize in designing, installing, and testing Earthing Systems. Our products are widely used in substations, data centres, factories, and residential buildings.

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Axis is a leading manufacturer and supplier of Electrical Components to over 80+ Countries. To get a quote or to talk to our industry expert write to us at [email protected].

#SubstationEarthing #SubstationEarthingDesign #SubstationCalculations

0:00 Introduction
0:20 Objectives of Substation Earthing
1:20 Standards for Designing Substation Earthing
1:38 8 Steps of Designing Substation Earthing
1:42 1- Soil Resistivity Test
1:58 2- Fault Current
2:19 3- Conductor Sizing for Earth Mat
2:40 4- Length of Earth Electrode
2:58 5- Mesh Size for Grounding Grid
3:20 6- Touch & Step Potential
4:01 7- Ground Potential Rise
4:31 8- Gride Impedance Measurement
5:09 Risk Mitigation Strategies for Substation

@ayaelasmer4095 6 months ago

Thank you for the interesting explanation.. Is it possible to do the Excel and calculations to create the ground for this station and the CAD file for it?