Protection of overhead lines with voltage of 380 V from the single-phase short circuits

摘要

The article deals with the issue of increasing the efficiency of the fuses in 380 V electrical networks with TN-C system with single-phase short circuits on the PEN conductor. The problem essence and scale are described briefly. To bring the protection in compliance with new regulatory requirements, partitioning the low voltage distribution network is proposed. The theoretical and experimental efficiency of the proposed protection of 380 V overhead lines from the single-phase short circuits via sectionalizing fuses is proved.