The Impact of Various Components of Multi-Grounded Three-phase Four-wire Distribution Systems on Neutral Wire Current

This contribution is aimed at representing the characteristics of neutral wire and also obtaining an optimal grounding resistance in different situations in a three-phase four-wire distribution network. To this end, various effects of the system components have been investigated on neutral wire characteristics and grounding system. On the other hand, it is concluded that, in addition to system imbalance, there are other determinative factors in which the neutral wire and grounding system have irregular characteristics. These factors include: transformer type and capacitor bank failure. The investigation also achieved an optimized grounding resistance for grounding system for different types of transformers.