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 data 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
1MRK 504 169-UEN A Section 20
Glossary
Transformer protection RET650 2.2 IEC 379
Application manual
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