This paper introduces a new family of Interphase Power Controller (IPC) for which the useful portion of the P-r-delta(sr) characteristics is shifted as the power transfer level is increased. Thus, the power characteristics of a specific IPC application can be adapted to the operating conditions of the network. The response of the IPC is compared to those of the two conventional technologies used in building it: the phase-angle regulator and series compensation. It is shown how the natural response of the IPC regulates the active power passively, without need for control action. Also, the reactive power can be controlled independently of the active power allowing for better voltage control. The new IPC retains the inherent qualities of the previous IPCs.