GE Multilin D30 Line Distance Relay 6-156 ACTUAL VALUES 6.3 METERING6The metered values for real, reactive, and apparent power, as well as power factor, are displayed in this menu. The "SRC1" text will be replaced by whatever name was programmed by the user for the associated source (see SETTINGS ÖØ SYS-TEM SETUP ÖØ SIGNAL SOURCES).g) FREQUENCY METERINGPATH: ACTUAL VALUES ÖØ METERING Ö SOURCE SRC 1 ÖØ FREQUENCYThe metered frequency values are displayed in this menu. The "SRC 1" text will be replaced by whatever name was pro-grammed by the user for the associated source (see SETTINGS ÖØ SYSTEM SETUP ÖØ SIGNAL SOURCES).SOURCE FREQUENCY is measured via software-implemented zero-crossing detection of an AC signal. The signal is either aClarke transformation of three-phase voltages or currents, auxiliary voltage, or ground current as per source configuration(see the SYSTEM SETUP ÖØ POWER SYSTEM settings). The signal used for frequency estimation is low-pass filtered. Thefinal frequency measurement is passed through a validation filter that eliminates false readings due to signal distortions andtransients.6.3.3 SYNCHROCHECKPATH: ACTUAL VALUES ÖØ METERING ÖØ SYNCHROCHECK Ö SYNCHROCHECK 1(2)The actual values menu for synchrocheck 2 is identical to that of synchrocheck 1. If a synchrocheck function setting is "Dis-abled", the corresponding actual values menu item will not be displayed.6.3.4 TRACKING FREQUENCYPATH: ACTUAL VALUES ÖØ METERING ÖØ TRACKING FREQUENCYThe tracking frequency is displayed here. The frequency is tracked based on the selection of the reference source with theFREQUENCY AND PHASE REFERENCE setting in the SETTINGS ÖØ SYSTEM SETUP ÖØ POWER SYSTEM menu. Refer to thePower System section of chapter 5 for additional details.MESSAGE SRC 1 POWER FACTORφa: 1.000MESSAGE SRC 1 POWER FACTORφb: 1.000MESSAGE SRC 1 POWER FACTORφc: 1.000 FREQUENCY SRC 1SRC 1 FREQUENCY:0.00 Hz SYNCHROCHECK 1SYNCHROCHECK 1 DELTAVOLT: 0.000 VMESSAGE SYNCHROCHECK 1 DELTAPHASE: 0.0°MESSAGE SYNCHROCHECK 1 DELTAFREQ: 0.00 Hz TRACKING FREQUENCYTRACKING FREQUENCY:60.00 Hz
