Grounding System For Information Electric Subject Electric Safety Mission Manual Calculation And Simulation By Gem.pdf

VIET NAM GENERAL CONFEDERATION OF LABOR TON DUC THANG UNIVERSITY FACULTY OF ELECTRICAL AND ELECTRONICS ENGINEERING GROUNDING SYSTEM FOR INFORMATION ELECTRIC SUBJECT: ELECTRIC SAFETY MI

VIET NAM GENERAL CONFEDERATION OF LABOR TON DUC THANG UNIVERSITY

FACULTY OF ELECTRICAL AND ELECTRONICS ENGINEERING

GROUNDING SYSTEM

FOR INFORMATION ELECTRIC

SUBJECT: ELECTRIC SAFETY MISSION MANUAL CALCULATION AND SIMULATION BY GEM :

LECTURER: PH.D NGUYEN CONG TRANG

GROUP: 13

STUDENTS:

VO THI UYEN NHI - ID: 42100434 NGUYEN LE PHUONG UYEN - ID: 42101058

HO CHI MINH CITY November, 13rd , 2022

1) Quiz 13 GEM: –

Design of a grounding rod system for information electr ic

Following request:

 Length of grounding rods: 𝐿 = 1,4𝑚

 Diameter of steel core copper pile: 𝑑𝑐= 13𝑚𝑚

 Bare copper cable: 𝑆 = 25𝑚𝑚2

 Soil resistivity by measuring machine: 𝜌đ= 30Ω𝑚

 Weather factors: 𝑘 = 1,2𝑚

 Distance between 2 rods: 𝑎 = 3𝑚

 Depth of the connecting wire: ℎ = 0,5𝑚

 Diameter of chemical pit : 15𝑐𝑚

 Width of Trench: 12𝑐𝑚

 Thickness of GEM: 7𝑐𝑚

2) Calculation:

Function: Working ground

Grounding system for information electric has the required resistance: 𝑅𝑛đ𝑦𝑐≤ 1Ω

ρtt= 𝜌đ× 𝐾𝑚= 20× 1,2 = Ω𝑚24

Choose the configuration of the grounding system: Grid shape

There are 10 lines and the number of rods in each line is 10 rods, so the total of length is:

𝐿 = 9 × 3 =𝑡 27𝑚 𝑎

𝐿 =1,4 ≈ 2, ⇒ η = 0,3 14 𝑐 75 ; η𝑡ℎ= 0,75

𝑟𝑐=𝜌 𝑡𝑡

2𝜋𝐿 𝑐[𝑙𝑛 ( 4𝐿 𝑐

1, ×𝑑 36 𝑐)] ×2ℎ+𝐿 𝑐

4ℎ+𝐿 𝑐 = 24 2𝜋×1,4[𝑙𝑛 ( 4×1,4 1,36 13 10 × × −3)] ×2×0,5+1,4

4×0,5+1,4= 11 09Ω,

𝑅𝑐=𝑛 × η𝑟𝑐

𝑐=1011,09× 0, = 1,48Ω75

3

II SIMULATING BY GEM:

1) GEM:

 With GEM chemicals:

 No GEM chemicals:

2) AUTOCAD:

III CONCLUSION:

After the parameters were performed by manual calculation and giving results are approximate relative to the values output from GEM software Furthermore, the ground resistance value of the whole system (𝑅𝑛đ𝐻𝑇) satisfies the required grounding resistance condition (𝑅𝑛đ𝑦𝑐) to design the standard of a grounding system for information electric This proves that the calculation method is correct and completely appropriate for the parameters from the title

Based on knowledge and experiences, choosing the type of the grounding system is working ground is perfectly qualified as well as reliable for guarantee working mode of network

In addition, the required parameters that are used to design the grounding system for information electric are quite small among all of earthing system in general Because there the major of rods to be eligible for this design, the choice of the configuration should be the grid shape Besides, the required resistance of this grounding system is less than or equal to

“one”, so the most optimal method is neutral grounding

COURSE REPORT/ FINAL THESIS DEFENSE

(size 28-32, yellow)

TON DUC THANG UNIVERSITY

FACULTY OF ELECTRICAL &

ELECTRONICS ENGINEERING

Presented by

Vo Thi Uyen Nhi – 42100434

Nguyen Le Phuong Uyen - 42101058 Under the supervision of Ph.D Nguyen Cong Trang

Ho Chi Minh City, November, 13 2022rd

Title: 13 - GEM

GROUNDING SYSTEM

OF INFORMATION ELECTRIC

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CONTENTS

1 Manual calculation design

2 Verification by GEM

3 Simulation

4 Conclusion

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1 MANUAL CALCULATION DESIGN

2) STEP 2: Determine calculation resistivity of soil

Find the number of rods and the length of the connecting

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1 MANUAL CALCULATION DESIGN

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1 MANUAL CALCULATION DESIGN

whole system

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2 VERIFICATION BY GEM

• WITH GEM CHEMICALS

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2 VERIFICATION BY GEM

• WITH GEM CHEMICALS

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2 VERIFICATION BY GEM

• NO GEM CHEMICALS

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2 VERIFICATION BY GEM

• NO GEM CHEMICALS

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3 SIMULATION

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4 CONCLUSION

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 In addition, the required parameters that are used to design the grou system for information electric are quite small among all of earthing syst general Because there the major of rods to be eligible for this desig choice of the configuration should be the grid shape Besides, the r

resistance of this grounding system is less than or equal to “one”, so t

optimal method is neutral grounding.

4 CONCLUSION

VIET NAM GENERAL CONFEDERATION OF LABOR

TON DUC THANG UNIVERSITY FACULTY OF ELECTRICAL AND ELECTRONICS ENGINEERING

DESIGN ESE DYSNASPHERE

FOR COMMERCIAL BUILDING

SUBJECT: ELECTRIC SAFETY MISSION MANUAL CALCULATION BENJI : –

LECTURER: PH.D NGUYEN CONG TRANG

GROUP: 13

STUDENTS:

VO THI UYEN NHI - ID: 42100434 NGUYEN LE PHUONG UYEN - ID: 42101058

HO CHI MINH CITY November, 13rd , 2022

1) Quiz 13 BENJI: –

Design ESE Dysnasphere for Commercial Building

Following request:

2) Calculation

amax(1)=√8022+202= 41 23, 𝑚 Choose 𝐷 = (𝑚) ⇒ 𝐼 = (𝑘𝐴) 60 15

amax(2)=√9022+502= 51 48, 𝑚 ∆𝑇 = 𝜇𝑠 ⇒ ∆𝐿 = 𝜇 ×40 40 106= 40𝑚

amax(3)=√7022+502= 43 01, 𝑚 ℎ𝑘𝑖𝑚= 3𝑚

Rp 5 ( )=√ℎ(2𝐷 − ℎ + ∆𝐿 2𝐷 + ∆𝐿) ( ) √5(2 × 60 − 5) + 40(2 × 60 + 40= ) = ,5𝑚 83

R(3)= ℎ ×𝑅𝑝(5)5 = 3 ×83,55 = 50,1 > amax (1)=> Satisfied

R(10)= √ℎ(2𝐷 − ℎ) + ∆𝐿 2𝐷 + ∆𝐿) ( = √10(2 × 60 10− ) + (2 × 60 4040 + ) = ,6𝑚 > 86 amax (2)=> Satisfied

R(12)= √ℎ(2𝐷 − ℎ) + ∆𝐿 2𝐷 + ∆𝐿) ( = √12(2 × 60 12− ) + (2 × 60 4040 + ) = ,7𝑚 > 87 amax(3)=> Satisfied

R(15)= √ℎ(2𝐷 − ℎ) + ∆𝐿 2𝐷 + ∆𝐿) = ( √15(2 × 60 15− ) + (2 × 60 4040 + ) = ,3𝑚 > 89 amax (2)=> Satisfied

amax(2)=51,48𝑚