6-20 T60 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUALMETERING CHAPTER 6: ACTUAL VALUES6This menu displays metered values for real, reactive, and apparent power, as well as power factor. The "SRC 1" text isreplaced by the name programmed by the user for the associated source (see SETTINGS SYSTEM SETUP SIGNALSOURCES).When VTs are configured in wye, the T60 calculates power in each phase and three-phase power is measured asS = VA x ÎA + V B x ÎB + VC x ÎC Eq. 6-1When VTs are configured in delta, the T60 does not calculate power in each phase and three-phase power is measured asS = VAB x Î A + VCB x Î C Eq. 6-2whereS is the apparent powerVA , V B , VC , IA , IB , IC are phase voltage and phase current phasorsVAB and VCB are phase-to-phase voltage phasorsÎ is the conjugate of I6.4.3.7 Energy meteringACTUAL VALUES METERING SOURCE SRC 1 ENERGYThis menu displays metered values for real and reactive energy. The "SRC 1" text is replaced by the name programmed bythe user for the associated source (see SETTINGS SYSTEM SETUP SIGNAL SOURCES). Because energy values areaccumulated, record them and then reset them immediately prior to changing CT or VT characteristics.6.4.3.8 Demand meteringACTUAL VALUES METERING SOURCE SRC 1 DEMAND SRC 1 APPARENT PWRφb: 0.000 VA SRC 1 APPARENT PWRφc: 0.000 VA SRC 1 POWER FACTOR3φ: 1.000 SRC 1 POWER FACTORφa: 1.000 SRC 1 POWER FACTORφb: 1.000 SRC 1 POWER FACTORφc: 1.000 ENERGY SRC 1 SRC 1 POS WATTHOUR:0.000 Wh SRC 1 NEG WATTHOUR:0.000 Wh SRC 1 POS VARHOUR:0.000 varh SRC 1 NEG VARHOUR:0.000 varh DEMAND SRC 1 SRC 1 DMD IA:0.000 A SRC 1 DMD IA MAX:0.000 A
