The calculation for circuit earth fault loop impedance is
A) Zs = Ze + R1 + R2
B) Ze = Zs - R1 + R2
C) Zs = Ze + R1 + Rn
D) Ze = Zs + R1 + R2

Question

Quizplus · Accepted Answer

The formula for circuit earth fault loop impedance is Zs = Ze + R1 + R2. This is because the circuit impedance (Zs) is equal to the sum of the earth fault loop impedance (Ze) and the resistance of the line conductor (R1) and the protective conductor (R2).

The Calculation for Circuit Earth Fault Loop Impedance Is