Research on 380V Neutral Wire Over-current Alarm Device

Through the analysis of TN-C and TN-S connection mode, this paper expounds the advantages and disadvantages of TN, the voltage distribution of the load is introduced through an example, and further introduces the necessity of developing neutral wire over current alarm device in the distribution network, and it discusses the composition, working principle and using method of the neutral wire over current alarm device. Through the application in the field, it is proved that the use this device for distribution network can prevent the neutral line outage and have the advantages of early warning. The development can improve corporate image, and has a wide range of promotion value and application prospects.