In the IEC 61850 standard, Logical Nodes (LN) are the smallest functional entities that exchange data. They represent real power system functions or devices and are grouped into specific classes based on their application area.
The following is a comprehensive list of Logical Nodes identified in the sources, categorized by their group indicators:
Group L: System Logical Nodes
Used for common device properties and communication management.
- LLNO: Logical Node Zero (Mandatory common data for a logical device).
- LPHD: Physical device information.
- LCCH: Physical communication channel supervision.
- LGOS: GOOSE subscription.
- LSVS: Sampled value subscription.
- LTIM: Time management.
- LTMS: Time master supervision.
- LTRK: Service tracking.
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Group A: Automatic Control
Nodes related to automated regulation and control functions.
- ANCR: Neutral current regulator.
- ARCO: Reactive power control.
- ARIS: Resistor control.
- ATCC: Automatic tap changer controller.
- AVCO: Voltage control.
- AZVT: Zero-voltage tripping.
Group C: Supervisory Control
Nodes used for monitoring and manual control actions.
- CALH: Alarm handling.
- CCGR: Cooling group control.
- CILO: Interlocking.
- CPOW: Point-on-wave switching.
- CSWI: Switch controller.
- CSYN: Synchronizer controller.
Group F: Functional Blocks
Standardized blocks for specific logic or calculation tasks.
- FCNT: Counter.
- FCSD: Curve shape description.
- FFIL: Generic filter.
- FLIM: Control function output limitation.
- FPID: PID regulator.
- FRMP: Ramp function.
- FSPT: Set-point control function.
- FXOT: Action at over threshold.
- FXUT: Action at under threshold.
Group G: Generic Functions
Nodes for programmable or undefined automation functions.
- GAPC: Generic automatic process control.
- GGIO: Generic process I/O.
- GLOG: Generic log.
- GSAL: Generic security application.
- GTES: Test generator.
Group I: Interfacing and Archiving
Nodes that manage human-machine and external system interfaces.
- IARC: Archiving.
- IHMI: Human machine interface.
- IHND: Hand interface.
- ISAF: Safety alarm function.
- ITCI: Telecontrol interface.
- ITMI: Telemonitoring interface.
- ITPC: Teleprotection communication interface.
- ITPI: Remote protection interface.
Group K: Mechanical and Non-Electrical Equipment
Monitoring for non-electrical primary components.
- KFAN: Fan.
- KFIL: Filter.
- KPMP: Pump.
- KTNK: Tank.
- KVLV: Valve control.
Group M: Metering and Measurement
Used for operational measurements and commercial metering.
- MDIF: Differential measurements.
- MENV: Environmental information.
- MFLK: Flicker measurement.
- MFLW: Flow measurements.
- MFUL: Fuel characteristics.
- MHAI: Harmonics or interharmonics.
- MHAN: Non-phase related harmonics/interharmonics.
- MHET: Heat measured values.
- MHYD: Hydrological information.
- MMDS: DC measurement.
- MMET: Metrological information.
- MMTR: Metering.
- MMTN: Single-phase metering.
- MPRS: Pressure measurements.
- MSQI: Sequence and imbalance.
- MSTA: Metering statistics.
- MMXN: Non-phase related measurements.
- MMXU: Electrical measurements (e.g., current, voltage).
Group P: Protection
The largest group, used for various protection-grade functions.
- PDIF: Differential protection.
- PDIR: Directional protection.
- PDIS: Distance protection.
- PDOP: Directional overpower.
- PDUP: Directional underpower.
- PFRC: Rate of change of frequency.
- PHAR: Harmonic restraint.
- PHIZ: Ground detector.
- PIOC: Instantaneous overcurrent.
- PMRI: Motor restart inhibition.
- PMSS: Motor starting time supervision.
- POPF: Over power factor.
- POVS: Over speed protection.
- PPAM: Phase angle measuring.
- PRTR: Rotor protection.
- PSDE: Sensitive directional earth fault.
- PTEF: Transient earth fault.
- PTHF: Thyristor protection.
- PTOC: Time overcurrent.
- PTOF: Overfrequency.
- PTOV: Overvoltage.
- PTRC: Protection trip conditioning.
- PTTR: Thermal overload.
- PTUC: Undercurrent.
- PTUF: Underfrequency.
- PTUV: Undervoltage.
- PUPF: Underpower factor.
- PVOC: Voltage controlled time overcurrent.
- PVPH: Volts per Hz relay.
- PZSU: Zero speed or underspeed.
Group Q: Power Quality Events
Monitoring for disturbances affecting power quality.
- QFVR: Frequency variation.
- QITR: Current transient.
- QIUB: Current unbalance variation.
- QVTR: Voltage transient.
- QVUB: Voltage unbalance variation.
- QVVR: Voltage variation.
Group R: Protection Related
Support functions for primary protection schemes.
- RADR: Disturbance recorder channel (analogue).
- RBDR: Disturbance recorder channel (binary).
- RBRF: Breaker failure.
- RDRE: Disturbance recorder function.
- RDRS: Disturbance recording evaluation (station level).
- RFLO: Fault locator.
- RPSB: Power swing blocking.
- RREC: Automatic reclosing.
- RSYN: Synchrocheck/Synchronizing.
- PSCH: Protection scheme.
- RCPW: Carrier or pilot wire protection.
Group S: Supervision and Monitoring
Monitoring the health and status of primary equipment.
- SARC: Arc monitoring and diagnostics.
- SCBR: Circuit breaker supervision.
- SIMG: Insulation medium supervision (gas).
- SIML: Insulation medium supervision (liquid).
- SIMS: Insulation medium supervision.
- SLTC: Tap changer supervision.
- SOPM: Supervision of operating mechanism.
- SPDC: Partial discharge supervision.
- SPTR: Power transformer supervision.
- SSWI: Circuit switch supervision.
- SSYS: System supervision.
- STIM: Time master.
- STMP: Temperature supervision.
- SVBR: Vibration supervision.
Group T: Instrument Transformers and Sensors
Images of sensors and physical process measurements.
- TANG: Angle.
- TAXD: Axial displacement.
- TCTR: Current transformer.
- TDST: Distance.
- TFLW: Liquid flow.
- TFRQ: Frequency.
- TGSN: Generic sensor.
- THUM: Humidity.
- TLEV: Level sensor.
- TLVL: Media level.
- TMGF: Magnetic field.
- TMVM: Movement sensor.
- TPOS: Position indicator.
- TPRS: Pressure sensor.
- TRTN: Rotation transmitter.
- TSND: Sound pressure sensor.
- TTMP: Temperature sensor.
- TTNS: Mechanical tension/stress.
- TVBR: Vibration sensor.
- TVTR: Voltage transformer.
- TWPH: Water acidity (pH).
Group X: Switchgear
Logical nodes for switching devices.
- XCBR: Circuit breaker.
- XFUS: Fuse.
- XSWI: Circuit switch / Isolator.
Group Y: Power Transformer
Components specific to power transformers.
- YEFN: Earth fault neutralizer (Petersen coil).
- YLTC: Tap changer.
- YPSH: Power shunt.
- YPTR: Power transformer.
Group Z: Further Power System Equipment
Primary equipment not covered in other groups.
- ZAXN: Auxiliary network.
- ZBAT: Battery.
- ZBSH: Bushing.
- ZCAB: Power cable.
- ZCAP: Capacitor bank.
- ZCON: Converter.
- ZGEN: Generator.
- ZGIL: Gas insulated line.
- ZLIN: Power overhead line.
- ZMOT: Motor.
- ZREA: Reactor.
- ZRES: Resistor.
- ZRRC: Rotating reactive component.
- ZSAR: Surge arrestor.
- ZSCR: Semiconductor controlled rectifier.
- ZSMC: Synchronous machine.
- ZTCF: Thyristor controlled frequency converter.
- ZTCR: Thyristor controlled reactive component.
Group W: Wind Power
Nodes defined for specific energy domains.
- WNAC: Nacelle (e.g., wind turbine position).
- WTUR: Wind turbine generator.
