The Yokogawa 2533/E33 is a 3-phase input, AC Digital Power Meter. It provides simultaneous display of 3 measured values; voltage, current, & power in each phase or total power, apparent power, reactive power, or power factor. The 2533/E33 also provides true rms measurements of square, triangular, and distorted waveforms. Maximum input is 600 VAC at 20A. IEEE-488 interface is standard.