System for identification of a feeder (2-1... 2-n) with high-ohmic earth fault in a distribution network grounded with an arc suppression coil, the system comprising a distribution network where each feeder (2-1... 2-n) of the distribution network is equipped with an intelligent electronics device (13-1... 13-n) of feeder bay; said distribution network has a neutral point or and the arc suppression coil is connected between grounding and the neutral point or and the distribution network is equipped with an auxiliary transformer and an injection device characterized in that: - the neutral point or of the distribution network is equipped with an intelligent electronics device of neutral point; - the intelligent electronics device of neutral point is connected with the intelligent electronics devices (13-1...13-n) of feeder bay by a substation horizontal communication network; - the injection device comprises a solid state switchgear having semiconductor valves connected to all three-phases of the low-voltage winding of the auxiliary transformer via terminals (T1, T2, T3) and with a neutral point of the auxiliary transformer via terminal; - and said injection device is configured to constantly inject generated measurement signal through the arc suppression coil to the distribution network in the following sequence: - In-phase injection from the phase L1 for a fixed time t on - Pause for a fixed time t off - Counter-phase injection from the phase L1 for the time t on - Pause for the time t off - In-phase injection from the phase L2 for the time t on - Pause for the time t off - Counter-phase injection from the phase L2 for the time t on - Pause for the time t off - In-phase injection from the phase L3 for the time t on - Pause for the time t off - Counter-phase injection from the phase L3 for the time t on - Pause for the time t off. - the neutral point or of the distribution network is equipped with an intelligent electronics device of neutral point; - the intelligent electronics device of neutral point is connected with the intelligent electronics devices (13-1...13-n) of feeder bay by a substation horizontal communication network; - the injection device comprises a solid state switchgear having semiconductor valves connected to all three-phases of the low-voltage winding of the auxiliary transformer via terminals (T1, T2, T3) and with a neutral point of the auxiliary transformer via terminal; - and said injection device is configured to constantly inject generated measurement signal through the arc suppression coil to the distribution network in the following sequence: - In-phase injection from the phase L1 for a fixed time t on - Pause for a fixed time t off - Counter-phase injection from the phase L1 for the time t on - Pause for the time t off - In-phase injection from the phase L2 for the time t on - Pause for the time t off - Counter-phase injection from the phase L2 for the time t on - Pause for the time t off - In-phase injection from the phase L3 for the time t on - Pause for the time t off - Counter-phase injection from the phase L3 for the time t on - Pause for the time t off. - In-phase injection from the phase L1 for a fixed time t on - Pause for a fixed time t off - Counter-phase injection from the phase L1 for the time t on - Pause for the time t off - In-phase injection from the phase L2 for the time t on - Pause for the time t off - Counter-phase injection from the phase L2 for the time t on - Pause for the time t off - In-phase injection from the phase L3 for the time t on - Pause for the time t off - Counter-phase injection from the phase L3 for the time t on - Pause for the time t off.