ABB RELION 670 Series Technical Manual page 1427

1MRK 502 066-UUS B
ITU
LAN
LIB 520
LCD
LDCM
LDD
LED
LNT
LON
MCB
MCM
MIM
MPM
MVAL
MVB
NCC
NOF
NUM
OCO cycle
OCP
OEM
OLTC
OTEV
OV
Overreach
PCI
PCM
PCM600
PC-MIP
PELV circuit
PMC
POR
POTT
Technical manual
International Telecommunications Union
Local area network
High-voltage software module
Liquid crystal display
Line data communication module
Local detection device
Light-emitting diode
LON network tool
Local operating network
Miniature circuit breaker
Mezzanine carrier module
Milli-ampere module
Main processing module
Value of measurement
Multifunction vehicle bus. Standardized serial bus originally developed for
use in trains.
National Control Centre
Number of grid faults
Numerical module
Open-close-open cycle
Overcurrent protection
Optical Ethernet module
On-load tap changer
Disturbance data recording initiated by other event than start/pick-up
Overvoltage
A term used to describe how the relay behaves during a fault condition. For
example, a distance relay is overreaching when the impedance presented
to it is smaller than the apparent impedance to the fault applied to the
balance point, that is, the set reach. The relay "sees" the fault but perhaps
it should not have seen it.
Peripheral component interconnect, a local data bus
Pulse code modulation
Protection and control IED manager
Mezzanine card standard
Protected Extra-Low Voltage circuit type according to IEC60255-27
PCI Mezzanine card
Permissive overreach
Permissive overreach transfer trip
Section 27
Glossary
1421