standard for the mechanics and the PCI specifications from the PCI SIG
(Special Interest Group) for the electrical EMF (Electromotive force).
IEEE 1686
Standard for Substation Intelligent Electronic Devices (IEDs) Cyber
Security Capabilities
IED
Intelligent electronic device
I-GIS
Intelligent gas-insulated switchgear
IOM
Binary input/output module
Instance
When several occurrences of the same function are available in the IED,
they are referred to as instances of that function. One instance of a
function is identical to another of the same kind but has a different
number in the IED user interfaces. The word "instance" is sometimes
defined as an item of information that is representative of a type. In
the same way an instance of a function in the IED is representative of a
type of function.
IP
1. Internet protocol. The network layer for the TCP/IP protocol suite
widely used on Ethernet networks. IP is a connectionless, best-effort
packet-switching protocol. It provides packet routing, fragmentation
and reassembly through the data link layer.
2. Ingression protection, according to IEC 60529
IP 20
Ingression protection, according to IEC 60529, level 20
IP 40
Ingression protection, according to IEC 60529, level 40
IP 54
Ingression protection, according to IEC 60529, level 54
IRF
Internal failure signal
IRIG-B:
InterRange Instrumentation Group Time code format B, standard 200
ITU
International Telecommunications Union
LAN
Local area network
LIB 520
High-voltage software module
LCD
Liquid crystal display
LDCM
Line differential communication module
LDD
Local detection device
LED
Light-emitting diode
LNT
LON network tool
LON
Local operating network
MCB
Miniature circuit breaker
MCM
Mezzanine carrier module
MPM
Main processing module
MVAL
Value of measurement
MVB
Multifunction vehicle bus. Standardized serial bus originally developed
for use in trains.
NCC
National Control Centre
NOF
Number of grid faults
NUM
Numerical module
OCO cycle
Open-close-open cycle
OCP
Overcurrent protection
OEM
Optical Ethernet module
Section 8
1MRK 500 125-UEN A
Glossary
54
Operation manual