Abstract: A system for remote locating earth fault in a multi-phase power grid powered by a power source, at least one remote detector arranged in the power grid not communicatively connected to the control unit wherein each remote detector has a unique current pattern identity. The control unit, when in a remote earth fault detection mode, is configured to adjust a voltage from the alternating voltage source with respect to the determined earth fault impedance RF and a corresponding delta angle step X to generate a zero-sequence current pattern based upon said impedance and said delta angle step X, wherein each detector is configured to identify a zero-sequence current pattern, and to determine which remote detector has a unique current pattern identity that corresponds to the identified current pattern.