ABB Relion 650 Series Commissioning Manual page 86

Section 10
Glossary
IP 20
IP 40
IP 54
IRF
IRIG-B:
ITU
LAN
LCD
LDD
LED
LNT
MCB
MVAL
NCC
NOF
NUM
OCO cycle
OCP
OLTC
OTEV
OV
Overreach
PCI
PCM600
PC-MIP
POR
POTT
Process bus
PSM
PST
80
2. Ingression protection, according to IEC standard
Ingression protection, according to IEC standard, level
IP20- Protected against solid foreign objects of12.5mm diameter and
greater.
Ingression protection, according to IEC standard, level IP40-Protected
against solid foreign objects of 1mm diameter and greater.
Ingression protection, according to IEC standard, level
IP54-Dust-protected,protected against splashing water.
Internal failure signal
InterRange Instrumentation Group Time code format B, standard 200
International Telecommunications Union
Local area network
Liquid crystal display
Local detection device
Light-emitting diode
LON network tool
Miniature circuit breaker
Value of measurement
National Control Centre
Number of grid faults
Numerical module
Open-close-open cycle
Overcurrent protection
On-load tap changer
Disturbance data recording initiated by other event than start/pick-up
Over-voltage
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
Protection and control IED manager
Mezzanine card standard
Permissive overreach
Permissive overreach transfer trip
Bus or LAN used at the process level, that is, in near proximity to the
measured and/or controlled components
Power supply module
Parameter setting tool within PCM600
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1MRK 505 289-UUS B
Busbar protection REB650
Commissioning manual