April 13 2021

Earthing Design Calculation for 380/132/11kV Substation

Earthing Design Calculation for 380/132/11kV Substation
MP4 | Video: h264, 1280x720 | Audio: AAC, 44100 Hz
Language: English | Size: 1.82 GB | Duration: 2h 53m

What you'll learn
From Scratch , Complete Earth Design Calculations of 380/132/11kV Substation
What Parameters are required fro Earthing design Calculations of Grid
Step by Step Guide of each step
Actual Substation Earth Design Calculations explained
Basic Understanding
Dear All,

I have prepared this course based on actual design calculations for the actual 380/132/11kV Substation.

Explained in detail topics step by Step.


Collecting information of substation, total line and transformer, etc

Collecting Network Data

Explaining Short Circuit Level, Fault Clearance time, Thermal Time

Collecting Data at Site for Specific Soil Resistivity

AEMC® - Wenner Soil Resistivity Testing Explained - Using 6472

Difference between resistivity and Resistance

How to Calculate Thermal Design of earthing electrode and conductors

Calculating Area for Conductor as per IEEE Std 80 2000

Discussing Fusing temperature, Ambient temp, Material Constant, Thermal Capacity, Thermal Coefficient

Discuss the Design Software Used for Calculations

Introduction to SES CDEGS _ FCDIST - Getting Started

Calculation of Grid Earth Resistance

Standard describing Minimum Requirement of Earth Resistance

Tolerable Touch and Step Potential

The formula for Step & Touch Potential

Determination of Maximum Grid Current

Determination of Ground Potential Rise

Design of earth grid with respect to touch and step voltages

Single-Electrode/Touch Voltages/Worst Spherical

Design Criteria for step & Touch Potential

Foundation Earth Electrodes

Indoor Earthing System

Outdoor Earthing system

Input to software

The grounding system in the substation is very important. The functions of grounding systems or earth mat include:

Ensure safety to personnel in substations against electrical shocks.

Provide the ground connection for connecting the neutrals of stat connected transformer winding to earth ( neutral earthing ).

Discharge the overvoltages from overhead ground wires or the lightning masts to earth. To provide a ground path for surge arresters.

Provide a path for discharging the charge between phase and ground by means of earthing switches.

To provide earth connections to structures and other non-current carrying metallic objects in the sub-station (equipment earthing).

In addition to such a grid below ground level, earthing spikes (electrodes) are driven into the ground. They are connected electrically to the earth grid, equipment bodies, structures, neutrals, etc. All these are connected to the station earthing system by earthing strips.

If the switchyards have a soil of low resistivity, the earth resistance of the earthing system would below. If the soil resistivity is high, the mesh rods are laid at closer spacing. More electrodes are inserted into the ground.


Muhammad Kashif

Who this course is for:
Student, Engineer, Professionals

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