Scribd
Upload
69 views3 pages

Ground Grid System Analysis Report

This document summarizes the electrical parameters and configuration of a grounding grid system according to IEEE Std 80-2000. It includes 11 ground conductors with a total length of 550 feet and 18 ground rods with a total length of 142 feet. The ground grid is modeled as a rectangular shape with 7 conductors in the X direction and 4 in the Y direction, spaced 13.1 feet and 11.4 feet apart respectively. Analysis of the ground grid system shows a ground resistance of 0.624 ohms and ground potential rise of 2382.3 volts during a fault, within acceptable tolerances.

Uploaded by

Diego Alejandro Vera Suarez
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
69 views3 pages

Ground Grid System Analysis Report

This document summarizes the electrical parameters and configuration of a grounding grid system according to IEEE Std 80-2000. It includes 11 ground conductors with a total length of 550 feet and 18 ground rods with a total length of 142 feet. The ground grid is modeled as a rectangular shape with 7 conductors in the X direction and 4 in the Y direction, spaced 13.1 feet and 11.4 feet apart respectively. Analysis of the ground grid system shows a ground resistance of 0.624 ohms and ground potential rise of 2382.3 volts during a fault, within acceptable tolerances.

Uploaded by

Diego Alejandro Vera Suarez
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 3

Project:

ETAP Page: 1
12.6.0H
Location: Date: 07-04-2020
Contract: SN:
Engineer: Study Case: MOYOTA Filename: TEMA2

Revision: Base

Electrical Transient Analyzer Program

Ground Grid Systems

IEEE Std 80-2000

Number of Ground Conductors: 11

Number of Ground Rods: 18

Total Length of Ground Conductors: 550.00 ft

Total Length of Ground Rods: 142.00 ft

Total Computational Time: 0 minutes

Frequency: 60,0

Unit System: English

Project Filename: TEMA2

Output Filename: C:\ETAP 1260\EXAMEN_MOYOTA\Grid1_MOYOTA.GR1


Project:
ETAP Page: 2
12.6.0H
Location: Date: 07-04-2020
Contract: SN:
Engineer: Study Case: MOYOTA Filename: TEMA2

Revision: Base

Ground Grid Input Data

System Data:

Short-Circuit Current Fault Duration (Seconds)


Total Sf Cp Tf Tc Ts
Ambient Fault Division Projection for for Sizing for
Freq. Weight Temp. Current Factor Factor Total Fault Ground Available
Hz kg °C kA X/R % % Duration Conductors Body Current
60,0 70 40.00 3.719 10.00 100.0 100.0 0.50 0.50 0.50

Soil Data:

Surface Material Upper Layer Soil Lower Layer Soil


Resistivity Depth Resistivity Depth Resistivity
Material Type Ohm.m ft Material Type Ohm.m ft MaterialType Ohm.m
Clean limestone 3000.0 0.820 Moist soil 20.0 5.00 Moist soil 20.0

Material Constants: Resistivity of Thermal


r Factor Fusing Ground Conducto Capacity
Conductivity @ 20 °C K0 @ Temperatur @ 20°C Per Unit
Conductor/Rod Type % 1/°C 0 °C e
°C micro ohm.cm Volume
J/(cm³.°C)

Conductor & Rod Copper-clad steel wire 1 40.0 0.00378 245.0 1084.0 4.40 3.85

Rod Data:

Diameter Length No. of Cost


inch ft Rods Arrangement $/Rod
1.600 7.87 18 Rods along Grid Perimeter 100.00

Grid Configuration:

Grid Length ft Number of Conductors Separation ft


Conductor
Size Depth in X in Y in X in Y Cost
AWG/kcmil ft Lx Ly Direction Direction Direction Direction $/ft
2/0 1.64 39.37 68.69 7 4 13.1 11.4 3.30 Shape: Rectangular

Cost:

Conductor Rod
Total Total Length Cost Total Total Length Cost Total Cost
No. ft $ No. ft $ $
11 550.35 1816.16 18 141.66 1800.00 3616.16
Project:
ETAP Page: 3
12.6.0H
Location: Date: 07-04-2020
Contract: SN:
Engineer: Study Case: MOYOTA Filename: TEMA2

Revision: Base

Ground Grid Summary Report

Rg GPR
Touch Potential Step Potential
Ground Ground
Resistance Potential Rise Tolerable Calculated Calculated Tolerable Calculated Calculated
ohm Volts Volts Volts % Volts Volts %
0.624 2382.3 1069.7 320.6 30.0 3612.9 311.2 8.6

Total Fault Current: 3.719 kA Reflection Factor (K): -0.987

Maximum Grid Current: 3.816 kA Surface Layer Derating Factor (Cs): 0.848

Decrement Factor (Df): 1.026

You might also like