## What does this spreadsheet do?

Program is designed as per ANSI/IEEE 80 Code, it calculates step potential of switchyard, touch potential of switchyard, total length of earthing mat conductor, size of earthing mat conductor and total number of earthing rods.

## Input fields As per ANSI/IEEE Std 80-1986 code

- Length of Area Occupied by Earthing Grid
- Width of Area Occupied by Earthing Grid
- Fault level at Incoming Bus
- Incoming Voltage
- Outgoing Voltage
- Soil Resistivity
- Resistance of Main Earthing Mat
- Resistance of surface Material (Crushed Rock )
- Thickness of Surface Material (Crushed Rock)
- Depth of Earthing Grid Conductor
- Diameter of Earthing Grid Conductor
- Reference Depth of Grid
- Spacing between Parallel Conductor of Grid

Software: |
Earthing Mat Design For Substation |

Version: |
22.12.2012 |

Developer: |
Jignesh Parmar |

Size: |
46 Kb |

Price: |
Free |

Download: |
Right here | Get Download Updates | Get Premium Membership |

What is the tolarable value of GPR/EPR for earthing grid calculation?

Sir,

Can u send me the details required to design an earth mat for 33/11 KV PSS

thanks alot

Excellent;

Ellithy

Professor in Power systems

I want to give a seminar on grid Earthing..Can u give me detail info about it?

Sir,

In the design procedure for earthing it is said that as we doubles the length of the rod the resistance will be reduced by 40% and when we increase the size of the electrode the resistance decreases by 10%. i am getting this . with reference to what equation the above mentioned conclusions is reached

I am not able to see the detailed drawing about construction of earth mat. A drawing shall be presented indicating driving/penetrating number of MS rod in ground and connecting all of them by a earthing flat/strip. Illustration of such drawing may help the young engineers to learn and execute.

Could u please explain me how to do the earth mat design for 220/132/33 kV Outdoor GSS which have 5 steps (135m, 138m, 141m, 144m, 147m).

Can’t do the Earth mat design separately for each step and finally connect each steps together. OR is it must to do the design for all the steps together?

Since their is huge civil work in step 144m and 147m it may take some time, so we can start lower 3 level works if we can lay the earth mat.

Thank you!

I want to design the Earthmat of Solar Park of 10MW consisting of 10 Nos. step up transformers spreading over huge land area, which is evacuating the power at 11kV level. Please suggest:

i) whether the each earth mat is to be connected.

ii) for DC earthing separate mat is provided?

iii) spacing between conductors and material??

I want to design the earth mat of a 33/11 kv substationat kanpur for which i want to know the fault current the resistivity we have found 22 ohm met and IEEE80 formule is not available,there fore I WANT YOUR HELP

Among the inputs data, i don’t understand what you mean by the following, which is both required in your program:

i) Reference Depth of Grid and Depth of Earthing Grid Conductor

ii) Diameter of Earthing Grid Conductor or size of earthmat flat

iii) Number of adjacent earthing mat conductors

iv) How evaluate the values Ks, Df

Kindly explain what you mean by these terminologies, and where to get such inputs.

Among the inputs data, i don’t understand what you mean by the following, which is both required in your program:

(i) Number of adjacent earthing mat conductors

(ii) Margin factor in earthing mat against corrosion and rusting.

Kindly explain what you mean by these terminologies, and where to get such inputs.

sir,

explain the brief note for earth mat calculation

Is there a version for use in the UK?

thanks for this page. ***** five stars !!!!

Great Job man! Thanks a lot!

Hi edvard,

could you put up an article for measuring the Earth Resistance, Step & Touch potentials, using a Injection transformer ?

Dear Sir

Thank you for this subject , i need to know how to determine required no. of earthing rods?

Regards

Can u send me the details required to design an earth mat for 132/33KV Substation which the area consist of 12400 Sqm and 13620 SqM?

GREAAAAT JOB!

I’M YOUR FAN!

Sir,

Can u send me the details required to design an earth mat for 230/110KV GIS Substation which the area consist of 60by 75 mtrs?