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TEST REPORTFOR SOIL
RESISTIVITYMEASURMENT
SITE: 400KV VELODA SS
DATE OF TESTING: 26.10.2012
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Wenner Test Method
Fig. shows the general measurement setup. The four earth probes should be driven into theground in a straight line, at a distance ‘a’ metres apart and driven to a depth of ‘P’ cm.
The maximum depth of the probe should not exceed 20cm nor exceed 1/20TH of the probe spacingdistance ‘a’. A series of resistance readings are taken for various spacings of the probes. For large sitesthe maximum spacings are increased to enable the soil resistivity to be assessed at a greater depth.
The four probes should be connected to the tester, with the outer probes connected to the C1 and C2terminals, and the inner probes to the P1 and P2 terminals. The instrument should be kept in a centralposition and a series of resistance measurements made as the four electrodes are moved out in equaldistances from the central point. A calculation is made to determine the average soil resistivity of alllayers of soil between the surface and a depth ‘d’ which is taken to be ¾ of the separation distance ‘a’.The meter should be left on to allow the built in filters to operate and the value after 30 seconds shouldbe taken. If the reading is varying significantly, this may be due to :-• Electrical interference• High contact resistance at the test probes• Damaged test leads• Reading at the lower limit of the instrument’s measuring capability
The apparent soil resistivity is then given by ρ=2paR (Ohm-meter)where:-ρ= ground resistivity in Ohm-meterp = 3.142a = electrode spacing in metresR = measured resistance in O at spacing 'a'
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
1 2.16 0.54 0.03 0.04 13.56 6.78 0.94 2.512 2.39 0.64 0.03 0.03 15.01 8.04 0.94 1.883 0.22 0.08 0.07 0.04 1.38 1.00 2.20 2.514 2.18 0.35 0.07 0.06 13.69 4.40 2.20 3.775 2.13 0.24 0.07 0.06 13.38 3.01 2.20 3.776 0.53 0.28 0.13 0.09 3.33 3.52 4.08 5.657 0.34 0.19 0.12 0.09 2.14 2.39 3.77 5.658 0.33 0.2 0.13 0.09 2.07 2.51 4.08 5.659 0.28 0.13 0.07 0.09 1.76 1.63 2.20 5.65
SITE: 400 KV VELODA SS (400KV SIDE)
Measured Soil Resistance (in Ω)Date: 24-OCT-2012
Calculated Soil Resistivity (in Ω-M)Location
No.Remarks
TEST REPORT OF SOIL RESISTIVITYMEASURMENT
FRO
M E
AST
-SO
UTH
TO
WES
T N
ORT
H
9 0.28 0.13 0.07 0.09 1.76 1.63 2.20 5.6510 0.36 0.24 0.09 0.06 2.26 3.01 2.83 3.7711 0.39 0.24 0.09 0.08 2.45 3.01 2.83 5.0212 0.29 0.19 0.11 0.08 1.82 2.39 3.45 5.0213 0.32 0.21 0.13 0.10 2.01 2.64 4.08 6.2814 0.28 0.17 0.09 0.09 1.76 2.14 2.83 5.6515 0.25 0.17 0.11 0.09 1.57 2.14 3.45 5.6516 0.28 0.18 0.12 0.07 1.76 2.26 3.77 4.4017 0.23 0.15 0.11 0.08 1.44 1.88 3.45 5.0218 0.27 0.18 0.13 0.07 1.70 2.26 4.08 4.4019 0.87 0.18 0.12 0.10 5.46 2.26 3.77 6.2820 0.23 0.13 0.11 0.08 1.44 1.63 3.45 5.0221 0.27 0.15 0.12 0.09 1.70 1.88 3.77 5.6522 0.31 0.16 0.13 0.08 1.95 2.01 4.08 5.0223 0.36 0.17 0.11 0.08 2.26 2.14 3.45 5.0224 0.37 0.19 0.15 0.08 2.32 2.39 4.71 5.0225 0.40 0.21 0.14 0.09 2.51 2.64 4.40 5.6526 0.34 0.22 0.13 0.08 2.14 2.76 4.08 5.0227 0.32 0.28 0.16 0.09 2.01 3.52 5.02 5.6528 0.36 0.22 0.13 0.08 2.26 2.76 4.08 5.0229 0.25 0.19 0.11 0.08 1.57 2.39 3.45 5.0230 0.38 0.20 0.12 0.07 2.39 2.51 3.77 4.40
FRO
M E
AST
-SO
UTH
TO
WES
T N
ORT
H
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
31 0.41 0.21 0.14 0.08 2.57 2.64 4.40 5.0232 0.36 0.19 0.12 0.08 2.26 2.39 3.77 5.0233 0.34 0.21 0.12 0.07 2.14 2.64 3.77 4.4034 0.36 0.22 0.11 0.08 2.26 2.76 3.45 5.0235 0.32 0.21 0.11 0.08 2.01 2.64 3.45 5.0236 0.36 0.19 0.12 0.07 2.26 2.39 3.77 4.4037 0.33 0.21 0.11 0.07 2.07 2.64 3.45 4.40
Date: 25-OCT-2012
LocationNo.
Measured Soil Resistance (in Ω) Calculated Soil Resistivity (in Ω-M)
Remarks
TEST REPORT OF SOIL RESISTIVITYMEASURMENT
SITE: 400 KV VELODA SS (400KV SIDE)
FRO
M N
OET
H-E
AST
TO
SO
UTH
-WES
T
37 0.33 0.21 0.11 0.07 2.07 2.64 3.45 4.4038 0.36 0.23 0.12 0.07 2.26 2.89 3.77 4.4039 0.39 0.24 0.11 0.06 2.45 3.01 3.45 3.7740 0.34 0.25 0.12 0.08 2.14 3.14 3.77 5.0241 0.33 0.21 0.14 0.09 2.07 2.64 4.40 5.6542 0.29 0.16 0.06 0.08 1.82 2.01 1.88 5.0243 0.34 0.21 0.14 0.09 2.14 2.64 4.40 5.6544 0.36 0.22 0.16 0.09 2.26 2.76 5.02 5.6545 0.33 0.2 0.12 0.06 2.07 2.51 3.77 3.7746 0.36 0.21 0.11 0.08 2.26 2.64 3.45 5.0247 0.48 0.19 0.09 0.07 3.01 2.39 2.83 4.4048 0.56 0.21 0.11 0.09 3.52 2.64 3.45 5.6549 0.87 0.24 0.16 0.08 5.46 3.01 5.02 5.0250 2.19 0.59 0.17 0.10 13.75 7.41 5.34 6.2851 1.29 0.69 0.17 0.12 8.10 8.67 5.34 7.5452 2.24 0.82 0.18 0.08 14.07 10.30 5.65 5.0253 1.38 0.28 0.16 0.03 8.67 3.52 5.02 1.8854 1.26 0.31 0.17 0.06 7.91 3.89 5.34 3.7755 1.3 0.43 0.12 0.06 8.16 5.40 3.77 3.7756 1.33 0.37 0.15 0.06 8.35 4.65 4.71 3.7757 1.57 0.41 0.08 0.04 9.86 5.15 2.51 2.5158 1.58 0.38 0.12 0.04 9.92 4.77 3.77 2.5159 1.42 0.34 0.11 0.05 8.92 4.27 3.45 3.1460 1.54 0.39 0.15 0.07 9.67 4.90 4.71 4.40
FRO
M N
OET
H-E
AST
TO
SO
UTH
-WES
T
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
61 0.42 0.2 0.07 0.05 2.64 2.51 2.20 3.1462 0.64 0.24 0.09 0.04 4.02 3.01 2.83 2.5163 0.31 0.26 0.12 0.07 1.95 3.27 3.77 4.4064 0.32 0.22 0.11 0.04 2.01 2.76 3.45 2.5165 0.34 0.24 0.1 0.05 2.14 3.01 3.14 3.1466 0.32 0.22 0.12 0.06 2.01 2.76 3.77 3.77 SI
DE
BORD
ER
AVERAGE SOIL RESISTIVITY FOR 400KV YARD
Calculated Soil Resistivity (in Ω-M)
TEST REPORT OF SOIL RESISTIVITYMEASURMENT
SITE: 400 KV VELODA SS (400KV SIDE)Date: 25-OCT-2012
LocationNo.
Measured Soil Resistance (in Ω) Calculated Soil Resistivity (in Ω-M)
Remarks
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
4.25 3.25 3.66 4.57
FOR ASIA TELECOM
AVERAGE SOIL RESISTIVITY FOR 400KV YARD
Calculated Soil Resistivity (in Ω-M)
DHARMENDRA PRAJAPATI(B.E. ELECTRICAL)
TESTED BY
TEST REPORT OF SOIL RESISTIVITYSITE: 400 KV VELODA SS (400KV SIDE)
Date: 24-OCT-2012
2.00
2.50
3.00
3.50
4.00
4.50
5.00
SOIL RESISTIVITY
SOIL RESISTIVITY OF 400KV SIDE
0.00
0.50
1.00
1.50
2.00
1 MTR 2 MTR 5 MTR 10 MTR
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
1 1.30 1.48 0.42 0.3 8.16 18.59 13.19 18.842 1.33 1.24 0.8 0.19 8.35 15.57 25.12 11.933 0.66 0.62 0.64 0.16 4.14 7.79 20.10 10.054 0.97 0.5 0.22 0.09 6.09 6.28 6.91 5.655 0.93 0.48 0.29 0.08 5.84 6.03 9.11 5.026 0.64 0.28 0.19 0.08 4.02 3.52 5.97 5.027 0.39 0.18 0.15 0.06 2.45 2.26 4.71 3.77
FRO
M E
AST
-NO
RTH
TO
WES
T SO
UTH
TEST REPORT OF SOIL RESISTIVITYMEASURMENT
SITE: 400 KV VELODA SS (220KV SIDE)Date: 26-OCT-2012
LocationNo.
Measured Soil Resistance (in Ω) Calculated Soil Resistivity (in Ω-M)
Remarks
7 0.39 0.18 0.15 0.06 2.45 2.26 4.71 3.778 0.24 0.18 0.12 0.08 1.51 2.26 3.77 5.029 0.25 0.15 0.14 0.06 1.57 1.88 4.40 3.77
10 0.32 0.17 0.11 0.07 2.01 2.14 3.45 4.4011 0.29 0.21 0.15 0.07 1.82 2.64 4.71 4.4012 0.31 0.19 0.14 0.1 1.95 2.39 4.40 6.2813 0.34 0.22 0.18 0.09 2.14 2.76 5.65 5.6514 0.59 0.21 0.13 0.09 3.71 2.64 4.08 5.6515 0.35 0.19 0.13 0.1 2.20 2.39 4.08 6.2816 0.39 0.24 0.18 0.09 2.45 3.01 5.65 5.6517 0.36 0.21 0.16 0.10 2.26 2.64 5.02 6.2818 0.35 0.25 0.17 0.09 2.20 3.14 5.34 5.6519 0.37 0.18 0.12 0.08 2.32 2.26 3.77 5.0220 0.38 0.21 0.14 0.08 2.39 2.64 4.40 5.0221 0.31 0.24 0.18 0.11 1.95 3.01 5.65 6.9122 0.34 0.19 0.12 0.08 2.14 2.39 3.77 5.02
FRO
M E
AST
-NO
RTH
TO
WES
T SO
UTH
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
23 0.27 0.16 0.12 0.08 1.70 2.01 3.77 5.0224 0.29 0.17 0.12 0.08 1.82 2.14 3.77 5.0225 0.28 0.18 0.13 0.09 1.76 2.26 4.08 5.6526 0.28 0.15 0.11 0.07 1.76 1.88 3.45 4.4027 0.22 0.16 0.12 0.08 1.38 2.01 3.77 5.0228 0.32 0.16 0.11 0.07 2.01 2.01 3.45 4.4029 0.26 0.17 0.12 0.09 1.63 2.14 3.77 5.65
LocationNo.
Measured Soil Resistance (in Ω) Calculated Soil Resistivity (in Ω-M)
Remarks
FRO
M N
OET
H-W
EST
TO S
OU
TH -E
AST
TEST REPORT OF SOIL RESISTIVITYMEASURMENT
SITE: 400 KV VELODA SS (220KV SIDE)Date: 26-OCT-2012
29 0.26 0.17 0.12 0.09 1.63 2.14 3.77 5.6530 0.27 0.2 0.12 0.08 1.70 2.51 3.77 5.0231 0.28 0.17 0.12 0.09 1.76 2.14 3.77 5.6532 0.29 0.21 0.13 0.09 1.82 2.64 4.08 5.6533 0.33 0.2 0.15 0.11 2.07 2.51 4.71 6.9134 0.34 0.2 0.14 0.09 2.14 2.51 4.40 5.6535 0.29 0.18 0.13 0.09 1.82 2.26 4.08 5.6536 0.36 0.18 0.12 0.09 2.26 2.26 3.77 5.6537 0.39 0.22 0.11 0.08 2.45 2.76 3.45 5.0238 0.29 0.16 0.11 0.07 1.82 2.01 3.45 4.4039 0.32 0.21 0.13 0.09 2.01 2.64 4.08 5.6540 0.38 0.23 0.14 0.09 2.39 2.89 4.40 5.6541 0.38 0.22 0.13 0.09 2.39 2.76 4.08 5.6542 0.39 0.23 0.17 0.11 2.45 2.89 5.34 6.9143 1.19 0.31 0.16 0.09 7.47 3.89 5.02 5.6544 1.32 0.56 0.31 0.18 8.29 7.03 9.73 11.30
FRO
M N
OET
H-W
EST
TO S
OU
TH -E
AST
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
45 0.37 0.19 0.15 0.12 2.32 2.39 4.71 7.5446 0.37 0.19 0.15 0.11 2.32 2.39 4.71 6.9147 0.25 0.18 0.14 0.09 1.57 2.26 4.40 5.6548 1.21 0.49 0.25 0.12 7.60 6.15 7.85 7.5449 1.36 0.65 0.38 0.21 8.54 8.16 11.93 13.1950 1.52 1.32 0.45 0.35 9.55 16.58 14.13 21.98
SIDE
BO
RDER
AVERAGE SOIL RESISTIVITY FOR 220KV YARD
Calculated Soil Resistivity (in Ω-M)
SITE: 400 KV VELODA SS (220KV SIDE)Date: 26-OCT-2012
LocationNo.
Measured Soil Resistance (in Ω) Calculated Soil Resistivity (in Ω-M)
Remarks
TEST REPORT OF SOIL RESISTIVITYMEASURMENT
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
3.17 3.89 5.90 6.59
(B.E. ELECTRICAL)
FOR ASIA TELECOM
AVERAGE SOIL RESISTIVITY FOR 220KV YARD
Calculated Soil Resistivity (in Ω-M)
TESTED BY
DHARMENDRA PRAJAPATI
TEST REPORT OF SOIL RESISTIVITYMEASURMENTSITE: 400 KV VELODA SS (220KV SIDE)
Date: 26-OCT-2012
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00SOIL RESISTIVITY IN OHM-METER
SOIL RESISTIVITY OF 220KV SIDE
0.00
1 MTR 2 MTR 5 MTR 10 MTR
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
1 0.3 0.15 0.08 0.06 1.88 1.88 2.51 3.772 0.31 0.14 0.06 0.04 1.95 1.76 1.88 2.513 0.24 0.15 0.09 0.04 1.51 1.88 2.83 2.514 0.22 0.12 0.08 0.04 1.38 1.51 2.51 2.515 0.31 0.15 0.09 0.05 1.95 1.88 2.83 3.146 0.28 0.15 0.08 0.04 1.76 1.88 2.51 2.517 0.29 0.13 0.08 0.04 1.82 1.63 2.51 2.51
SITE: 400 KV VELODA SS (66KV SIDE)
TEST REPORT OF SOIL RESISTIVITYMEASURMENT
Date: 25-OCT-2012
LocationNo.
Measured Soil Resistance (in Ω) Calculated Soil Resistivity (in Ω-M)Remarks
7 0.29 0.13 0.08 0.04 1.82 1.63 2.51 2.518 0.29 0.14 0.09 0.05 1.82 1.76 2.83 3.149 0.27 0.13 0.07 0.03 1.70 1.63 2.20 1.88
10 0.22 0.14 0.07 0.06 1.38 1.76 2.20 3.7711 0.21 0.13 0.1 0.05 1.32 1.63 3.14 3.1412 0.38 0.18 0.11 0.07 2.39 2.26 3.45 4.40
with S=1mtr.
with S=2mtr.
with S=5mtr.
with S=10mtr.
1.74 1.79 2.62 2.98
AVERAGE SOIL RESISTIVITY FOR 66KV YARD
FOR ASIA TELECOM
Calculated Soil Resistivity (in Ω-M)
TESTED BY
DHARMENDRA PRAJAPATI(B.E. ELECTRICAL)
TEST REPORT OF SOIL RESISTIVITYSITE: 400 KV VELODA SS (66KV SIDE)
Date: 25-OCT-2012
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
1 MTR 2 MTR 5 MTR 10 MTR
SOIL RESISTIVITY IN OHM-METER
SOIL RESISTIVITY OF 66KV SIDE
1 MTR 2 MTR 5 MTR 10 MTR