HMI
Human-machine interface
HSAR
High speed autoreclosing
HV
High-voltage
HVDC
High-voltage direct current
IDBS
Integrating deadband supervision
IEC
International Electrical Committee
IEC 60044-6
IEC Standard, Instrument transformers – Part 6: Requirements for
protective current transformers for transient performance
IEC 61850
Substation automation communication standard
IEEE
Institute of Electrical and Electronics Engineers
IEEE 802.12
A network technology standard that provides 100 Mbits/s on twisted-
pair or optical fiber cable
IEEE P1386.1
PCI Mezzanine Card (PMC) standard for local bus modules. References
the CMC (IEEE P1386, also known as Common Mezzanine Card)
standard for the mechanics and the PCI specifications from the PCI SIG
(Special Interest Group) for the electrical EMF (Electromotive force).
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
LIB 520
High-voltage software module
LCD
Liquid crystal display
LDD
Local detection device
LED
Light-emitting diode
MCB
Miniature circuit breaker
MCM
Mezzanine carrier module
MVB
Multifunction vehicle bus. Standardized serial bus originally developed
for use in trains.
NCC
National Control Centre
1MRK 514 014-UEN A
Section 11
Glossary
650 series
53
Installation manual
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