ABB IEC 61850 Edition 2 Communication Protocol Manual

Also see for IEC 61850 Edition 2: Communication protocol manual

MIM Milli-ampere moduleMPM Main processing moduleMVAL Value of measurementMVB Multifunction vehicle bus. Standardized serial busoriginally developed for use in trains.NCC National Control CentreNOF Number of grid faultsNUM Numerical moduleOCO cycle Open-close-open cycleOCP Overcurrent protectionOEM Optical Ethernet moduleOLTC On-load tap changerOTEV Disturbance data recording initiated by other event thanstart/pick-upOV OvervoltageOverreach A term used to describe how the relay behaves during afault condition. For example, a distance relay isoverreaching when the impedance presented to it issmaller than the apparent impedance to the fault appliedto the balance point, that is, the set reach. The relay “sees”the fault but perhaps it should not have seen it.PCI Peripheral component interconnect, a local data busPCM Pulse code modulationPCM600 Protection and control IED managerPC-MIP Mezzanine card standardPMC PCI Mezzanine cardPOR Permissive overreachPOTT Permissive overreach transfer tripProcess bus Bus or LAN used at the process level, that is, in nearproximity to the measured and/or controlled componentsPRP Parallel redundancy protocolPSM Power supply modulePST Parameter setting tool within PCM600PTP Precision time protocolPT ratio Potential transformer or voltage transformer ratioPUTT Permissive underreach transfer tripRASC Synchrocheck relay, COMBIFLEXSection 9 1MRK 511 393-UEN AGlossary58 670 series 2.2 IECCommunication protocol manual