Theoretical earth fault current

Calculates approximate fault current from voltage and loop impedance.

Calculates approximate touch voltage from fault current and earth resistance.

Calculates resistance as voltage divided by current in a simplified model.

Calculates theoretical maximum loop impedance from voltage and trip current.

Calculates simplified current from voltage and loop impedance.

Helper calculation for current from voltage and loop impedance; it is not protection assessment or standards-based protective-device selection.