PSM System. Includes a PSM module, a Terminal Assembly and two interface cables. The PAC Systems Power Sync and Measurement (PSM) system monitors two independent three-phase power grids. It incorporates advanced digital signal processor (DSP) technology to continuously process three voltage inputs and four current inputs for each grid. Measurements include RMS voltages, RMS currents, RMS power, frequency and phase relationship between the phase voltages of both grids. The PSM module performs calculations on each captured waveform, with the DSP processing the data in less than two-thirds of a power line cycle. The PSM module can be used with wye or delta type three-phase power systems or with single-phase power systems.