5-114 F60 Feeder Protection System GE Multilin5.4 SYSTEM SETUP 5 SETTINGS5Firmware version 7.0 allows the N60 to support a maximum of four Logical Device PMUs (Logical Device 2 through 5) andfour aggregators (located in Logical Device 1 (LD1)), while other UR family members support one PMU and only oneaggregator. The control blocks for the aggregators are located in LD1. A 64 char LDName setting is provided, see figurebelow..Figure 5–42: N60 SUPPORT FOR FOUR LOGICAL DEVICE PMUSThe specifics of implementation by model number is summarized in the table below.Precise time input to the relay from the international time standard, via either IRIG-B or PTP, is vital for correct syn-chrophasor measurement and reporting. For IRIG-B, a DC level shift IRIG-B receiver must be used for the phasormeasurement unit to output proper synchrophasor values.Table 5–10: IMPLEMENTATION BY MODEL NUMBERMODEL NUMBER OFPMUSNUMBER OFAGGREGATORSNUMBER OF ANALOGINPUTSN60 4 4 16D60, F60, G60, L30,L90, T601 1 16NOTE
