Hitachi Relion 670 Series Operation Manual page 101

1MRK500127-UUS Rev. M
LAN
LIB 520
LCD
LDAPS
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
670 series
Operation manual
Local area network
High-voltage software module
Liquid crystal display
Lightweight Directory Access Protocol
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
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Section 10
Glossary
95