Answer / Avnish Bharadwaj

Resistance earthing, or Earthing through a resistor, is used when the fault current is too high for the system's protective devices. It reduces the initial fault current by introducing a resistor in the earth line. To calculate the time constant (τ) for an earth fault, you can use the formula τ = R * C, where R is the resistance and C is the capacitance of the circuit.

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