According to the application that interphase power controllers（IPCs） limit short-circuit currents， its prototype structure is described. Furthermore， the series model and current source model of IPCs are presented. Based on the current source model of IPCs， the mechanism of short-circuit currents limitation and influence factors of application are demonstrated. Finally， the IEEE five nodes system with IPC is simulated for analyzing the functions of these two models in application research. Three conclusions are derived form the results.（1） The features of IPCs limiting short-circuit currents are influenced by the system parameters， load situation， and device parameters.（2） The series model of IPCs can be used to reasonableness examinations of equipment design parameters and the power flow calculations.（3） The current source model of IPCs can be applied to short-circuit current calculations and electromechanical transient researches.