Abstract <p>In 6- to 10-kV distribution networks operating with an isolated neutral, current protection based on monitoring the fundamental frequency component of the zero-sequence current is mainly used for protection against single-phase ground faults. The selectivity and stability of such protection are significantly affected by intense transient processes during intermittent arcing single-phase ground faults. One promising area for improving current protection against single-phase ground faults is to increase the selectivity and stability of their operation based on recognizing the types of ground faults using a multiparameter approach to implementing relay protection. To develop and study the methods and algorithms for recognizing the types of ground faults in 6- to 10-kV networks with an isolated neutral and to assess the effectiveness of their application in order to increase the selectivity and stability of current protection against single-phase ground faults, simulation modeling in MATLAB, SimPowerSystems, and Simulink was used. The configuration and parameters of the simulation models were selected taking into account the main features of 6- to 10-kV distribution cable and overhead networks of industrial, urban, and agricultural power-supply systems, determining the characteristics of steady-state and transient modes during single-phase ground faults. The principles of implementation and a diagram of multiparameter current protection against single-phase ground faults for 6- to 10-kV networks with an isolated neutral were developed, ensuring the recognition of all considered types of ground faults (stable, intermittent arc, and nonhazardous arc intermittent for the network) and the ability to automatically select on this basis the most effective method of its action (signal or shutdown). The results of functional tests on simulation models confirmed the efficiency of the developed algorithms for the operation of multiparameter current protection for all considered types of single-phase ground faults in 6- to 10-kV networks with an isolated neutral. The developed technical solution implements multiparameter current protection against single-phase earth faults, providing increased selectivity and stability of operation for all types of earth faults compared to traditional designs of current protection against this type of damage, continuity of operation not only for stable, but also for the most dangerous arc intermittent earth faults, as well as the ability to select the method of operation of protection for these types of earth faults.</p>