... Q2, Q3, QsumApparent Power S1, S2, S3, SsumFrequency FPower Factor PF1, PF2, PF3, PFEnergy Ep_imp, Ep_exp, Ep_total, Ep_netReactive ... and THDVoltage Crest FactorTHFF (TIF)Current K FactorVoltage Unbalance Factor U_unblCurrent Unbalance Factor I_unblMax/Min Statistics with Time StampsFexible I ... II. A maximum of 3 modules can be used for one meter. Digital input, Digital output, pulse output, relay ...