FEATURE 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 V.AVG/I.AVG/FREQ/P.TL/Q.TL/ S.TL / PF.AVG / AE.TL / RE.TL / VA / VB / VC / IA / IB / IC / PF-A / PF-B / PF-C /P-A / P-B / P-C / Q-A / Q-B / Q-C / S-A / S-B / S-C, having relay function : Hi / Lo / Hi Hold / Lo Hold / Do / OFF;further advance function , start delay, hysteresis, time delay, reset delay etc. 4 analogues output same as relay setting parameters. ????Output range: Current 0~10mA / 0~20 mA / 4~20 mA / 4~12~20 mA / ¡Ó10 mA / ¡Ó20 mA ????Output range: Voltage 0~5V / 1~5 V / 0~10 V / 0~2.5~5 V / 1~3~5 V / 0~5~10 V / ¡Ó5 V / ¡Ó10 V 2 set of open collector pulse for Kilowatt-Hour and Kvar-hour output, maximum frequency 1000Hz. Outer case wall mounting or din rail mounting(EN500022) Product design according to CE.