How can we calculate earth mat conductor size ..? & give
the formula to determine earth conductor size?
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Answer Posted / prasad
for bolted joints cross section Area of the conductr
A=0.0013*I*sqrt(t),
for welded joints cross section Area of the conductr
A=0.011*I*sqrt(t),
I - Fault current (KA) = Fault MVA/ (sqrt3 * system KV)
t - Duration of time
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