Table 3 Comparison of impulse impedance of horizontal grounding conductor with and without considering the mutual coupling
Current Peak (kA) | Soil Resistivity | ||||||
|---|---|---|---|---|---|---|---|
\(\rho\)= 50 Ω m | \(\rho =\) 500 Ω m | ||||||
Impulse impedance (Ω) | Relative difference (in %) | Impulse impedance (Ω) | Relative difference (in %) | ||||
With mutual coupling | Without mutual coupling | With mutual coupling | Without mutual coupling | ||||
10 | 14.70 | 13.80 | 6.12 | 71.00 | 67.00 | 5.63 | |
20 | 10.70 | 10.00 | 6.54 | 48.00 | 45.00 | 6.25 | |
50 | 7.60 | 7.00 | 7.89 | 37.60 | 35.00 | 6.91 | |
100 | 6.60 | 6.00 | 9.09 | 33.00 | 30.60 | 7.27 | |