HSR High-availability Seamless Redundancy
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 60870-5-103 Communication standard for protection equipment. A serial master/slave
protocol for point-to-point communication
IEC 61850 Substation automation communication standard
IEC 61850–8–1 Communication protocol 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).
IEEE 1686 Standard for Substation Intelligent Electronic Devices (IEDs) Cyber Security
Capabilities
IED Intelligent electronic device
IET600 Integrated engineering tool
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
IP20- Protected against solid foreign objects of 12.5mm diameter and greater.
IP 40 Ingression protection, according to IEC 60529, level IP40-Protected against
solid foreign objects of 1mm diameter and greater.
IP 54 Ingression protection, according to IEC 60529, level
IP54-Dust-protected, protected against splashing water.
IRF Internal failure signal
IRIG-B: InterRange Instrumentation Group Time code format B, standard 200
Section 16 1MRK 504 165-UUS Rev. J
Glossary
318 Transformer protection RET670
Commissioning manual
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