GE Multilin F60 Feeder Protection System C-27APPENDIX C C.7 LOGICAL NODESCRSYN: Synchronism-check or synchronizing ---C: LOGICAL NODES FOR CONTROLCALH: Alarm handling ---CCGR: Cooling group control ---CILO: Interlocking ---CPOW: Point-on-wave switching ---CSWI: Switch controller YesG: LOGICAL NODES FOR GENERIC REFERENCESGAPC: Generic automatic process control ---GGIO: Generic process I/O YesGSAL: Generic security application ---I: LOGICAL NODES FOR INTERFACING AND ARCHIVINGIARC: Archiving ---IHMI: Human machine interface ---ITCI: Telecontrol interface ---ITMI: Telemonitoring interface ---A: LOGICAL NODES FOR AUTOMATIC CONTROLANCR: Neutral current regulator ---ARCO: Reactive power control ---ATCC: Automatic tap changer controller ---AVCO: Voltage control ---M: LOGICAL NODES FOR METERING AND MEASUREMENTMDIF: Differential measurements ---MHAI: Harmonics or interharmonics ---MHAN: Non phase related harmonics or interharmonic ---MMTR: Metering ---MMXN: Non phase related measurement YesMMXU: Measurement YesMSQI: Sequence and imbalance ---MSTA: Metering statistics ---S: LOGICAL NODES FOR SENSORS AND MONITORINGSARC: Monitoring and diagnostics for arcs ---SIMG: Insulation medium supervision (gas) ---SIML: Insulation medium supervision (liquid) ---SPDC: Monitoring and diagnostics for partial discharges ---X: LOGICAL NODES FOR SWITCHGEARXCBR: Circuit breaker YesXSWI: Circuit switch YesT: LOGICAL NODES FOR INSTRUMENT TRANSFORMERSTCTR: Current transformer ---TVTR: Voltage transformer ---Y: LOGICAL NODES FOR POWER TRANSFORMERSYEFN: Earth fault neutralizer (Peterson coil) ---YLTC: Tap changer ---YPSH: Power shunt ---YPTR: Power transformer ---Table C–1: IEC 61850 LOGICAL NODES (Sheet 2 of 3)NODES UR-FAMILY