حاسبة نظام التأريض | BS-7430:2011+A1:2015 |
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ARAM
Earthing System Calculator
According to BS-7430:2011+A1:2015
⚙️ Super Admin Dashboard
Manage Prices and View Data
Price Management 💰
Copper Cladded Earthing Rod
| Type | REF NO. | Price (EGP) |
|---|---|---|
| Diameter=3/4, Length 1.5m | DARR-3415 | |
| Diameter=3/4, Length 1.2m | DARR-3412 | |
| Diameter=5/8, Length 1.5m | DARR-5815 | |
| Diameter=5/8, Length 1.2m | DARR-5812 |
Coupling Dowel
| Type | REF NO. | Price (EGP) |
|---|---|---|
| Diameter 3/4 | DAR-CD34 | |
| Diameter 5/8 | DAR-CD58 |
Inspection Pit
| Type | REF NO. | Price (EGP) |
|---|---|---|
| Inspection Pit | AR-3030 |
U-Clamp
| Type | REF NO. | Price (EGP) |
|---|---|---|
| U-Clamp | DAR-UC34 |
Earth Bar
| Type | REF NO. | Price (EGP) |
|---|---|---|
| 30cm x 5cm x 5mm with disconnecting link | AR-3055 |
Enhancement Material
| Type | REF NO. | Price per unit (EGP) |
|---|---|---|
| Enhancement Material (per 1.5m coverage) | ATM-11 |
Bare Copper Cable (per meter)
| C.S.A (mm²) | REF NO. | Price per meter (EGP) |
|---|---|---|
| 6 | SWB-6 | |
| 10 | SWB-10 | |
| 16 | SWB-16 | |
| 25 | SWB-25 | |
| 35 | SWB-35 | |
| 50 | SWB-50 | |
| 70 | SWB-70 | |
| 95 | SWB-95 | |
| 120 | SWB-120 | |
| 150 | SWB-150 | |
| 185 | SWB-185 | |
| 240 | SWB-240 | |
| 300 | SWB-300 | |
| 400 | SWB-400 |
Installation Price Management 🔧
Pit Installation Price
| Description | Price per Pit (EGP) |
|---|---|
| Pit Installation Cost |
Cable Installation Price (per meter by CSA)
| C.S.A (mm²) | Installation Price per meter (EGP) |
|---|---|
| 6 | |
| 10 | |
| 16 | |
| 25 | |
| 35 | |
| 50 | |
| 70 | |
| 95 | |
| 120 | |
| 150 | |
| 185 | |
| 240 | |
| 300 | |
| 400 |
Transportation
| Description | Price (EGP) |
|---|---|
| Transportation Cost |
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Equipment Configuration
Adjustable
Soil Resistivity Test (Wenner Method)
Wenner Method Formula:
(BS-7430:2011+A1:2015 - Clause 9.4)
(Reduces ρ to 60%)
Short Circuit Calculation
Conductor Sizing Formulas:
(BS-7430:2011+A1:2015 - Clause 9.7)
(BS-7430:2011+A1:2015 - Clause 9.7)
Transformer Data
RMU Data
Typical: 750 MVA for 22kV, 500 MVA for 11kv
MDB Data
Cable Sizing Parameters (BS-7430)
Proposed System Description
Multi Rod Resistance Formula:
(BS-7430:2011+A1:2015 - Clause 9.5.4)
(BS-7430:2011+A1:2015 - Clause 9.5.4)
Cable Resistance Formula:
(BS-7430:2011+A1:2015 - Clause 9.5.5)
Typical: 0.6 or 0.8 m
Recommended: 70 mm²
Enter the total cable length for connection
Earth Bar (Optional)
📊 Calculation Results
🔬 Soil Resistivity Test Results
Applied Formula:
(BS-7430:2011+A1:2015 - Clause 9.4)
0.00 Ω.m
⚡ Short Circuit Data
1 MVA
22.00 kV
0.40 kV
4%
7.50 MVA
10.83 kA
📐 Conductor Sizing (BS-7430)
Applied Formulas:
(BS-7430:2011+A1:2015 - Clause 9.7)
(BS-7430:2011+A1:2015 - Clause 9.7)
Note: I is in Amperes (A) in this formula, Material Constants (copper): K₁ = 226, β = 234.5
10.83 kA (RMS)
1 sec
25 °C
250 °C
Copper
176.05
50.62 mm²
70 mm²
Calculation: S = I × √t / K = 10825 × √1 / 178.58 = 60.62 mm²
🔧 Multi Rod Resistance - Rn
Applied Formula:
(BS-7430:2011+A1:2015 - Clause 9.5.4)
(BS-7430:2011+A1:2015 - Clause 9.5.4)
4
2
1.5 m
3.00 m
17.2 mm
3.60 m
80.03 Ω.m
1.9271
0.4777 Ω
Calculation: Total Rod Length = Rods per Pit × Single Rod Length = 2 × 1.50 = 3.00 m
📏 Cable Resistance - RcL
Applied Formula:
(BS-7430:2011+A1:2015 - Clause 9.5.5)
Where: k = 1.83 (for round conductors)
12.00 m
70 mm²
9.5 mm
0.60 m
11.394742 Ω
🔗 Grid Resistance - Rg
Applied Formula:
(Parallel Combination)
Note: Grid resistance is the parallel combination of Rn and RcT
0.4777 Ω
11.284742 Ω
0.217980 Ω
📊 Total Earthing Resistance
Final Calculation:
(BS-7430:2011+A1:2015)
0.217980 Ω
Calculation Summary:
• Multi Rod Resistance: Rn = 0.4777 Ω
• Cable Resistance: RcL = 11.284742 Ω
• Grid Resistance: Rg = 0.217980 Ω
• Total Resistance: Rt = Rg = 0.217980 Ω
• Multi Rod Resistance: Rn = 0.4777 Ω
• Cable Resistance: RcL = 11.284742 Ω
• Grid Resistance: Rg = 0.217980 Ω
• Total Resistance: Rt = Rg = 0.217980 Ω
💰 System Cost Breakdown
| Item No. | Description | REF NO. | Manuf. |
|---|
Total Estimated Cost (Supply Only)
0.00 EGP
📋 Important Notes:
- System prices excluding PVC cables
- System prices excluding VAT
- For Lightning protection systems, the prices include the price of one earthing system excluding air termination network
🔒 Login Required
Please login or create an account to view the system cost breakdown.
⚡ ARAM
EARTHING SYSTEM CALCULATOR
According to BS-7430:2011+A1:2015
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