6-2 L90 Line Current Differential System GE Multilin6.1 OVERVIEW 6 ACTUAL VALUES6 SOURCE SRC 3 SOURCE SRC 4 SENSITIVE DIRECTIONAL POWER See page 6-20. SYNCHROCHECK See page 6-20. TRACKING FREQUENCY See page 6-20. FREQUENCY RATE OF CHANGE See page 6-20. FLEXELEMENTS See page 6-21. IEC 61850 GOOSE ANALOGS See page 6-21. WATTMETRIC GROUND FAULT 1 See page 6-22. WATTMETRIC GROUND FAULT 2 See page 6-22. PHASOR MEASUREMENT UNIT See page 6-22. TRANSDUCER I/O DCMA INPUTS See page 6-23. TRANSDUCER I/O RTD INPUTS See page 6-23. ACTUAL VALUES RECORDS FAULT REPORTS See page 6-24. EVENT RECORDS See page 6-24. OSCILLOGRAPHY See page 6-25. DATA LOGGER See page 6-25. PMU RECORDS See page 6-25. MAINTENANCE See page 6-26. ACTUAL VALUES PRODUCT INFO MODEL INFORMATION See page 6-27. FIRMWARE REVISIONS See page 6-27.