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
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 standard
IP 20
Ingression protection, according to IEC standard, level 20
IP 40
Ingression protection, according to IEC standard, level 40
IP 54
Ingression protection, according to IEC standard, 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
LCD
Liquid crystal display
LDD
Local detection device
LED
Light-emitting diode
LNT
LON network tool
MCB
Miniature circuit breaker
MVAL
Value of measurement
NCC
National Control Centre
NOF
Number of grid faults
NUM
Numerical module
OCO cycle
Open-close-open cycle
OCP
Overcurrent protection
Section 22
1MRK 504 135-UEN A
Glossary
658
Technical manual
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