Multifunction Power Transducer Input 1P2W,1P3W¡Q3P3W,3P4W (Balanced/Unbalanced) load system¡¦s active power, reactive power, apparent power and electric energy (Watts-Hr) etc parameters. 1 set relay(SPDT) output, with 3 variable setting (R1.1/R1.2/R1.3), each react to setting parameters