Alstom MiCOM P846, Technical Manual

Page: 274 / 298

P846/EN SG/D Symbols and Glossary
(SG) 14-2 MiCOM P846
SG
Symbol Explanation
FLC
urrent for the circuit.
Full load current:
The nominal rated c
Flt.
ase selection.
Abbreviation of “Fault”:
Typically used to indicate faulted ph
Fwd. rection. Indicates an element responding to a flow in the “Forward” di
Gnd. Abbreviation of “Ground”:
Used in distance settings to identify settings that relate to ground (earth) faults.
GRP.
up.
Abbreviation of “Group”:
Typically an alternative setting gro
I Current.
I
∧
Current raised to a power:
ics monitor the square of ruptured current squared Such as when breaker statist
(
∧
power = 2).
I< nt element: An undercurre
Responds to current dropout.
I
0
asured neutral/residual current.
Zero sequence current:
Equals one third of the me
I
1
Positive sequence current.
I
2
Negative sequence current.
IA Phase A current:
Might be phase L1, red phase.. or other, in customer terminology.
IB
yellow phase.. or other, in customer terminology.
Phase B current:
Might be phase L2,
IC
blue phase.. or other, in customer terminology.
Phase C current:
Might be phase L3,
ID
ftware version installed.
Abbreviation of “Identifier”:
Often a label used to track a so
In
atch the line CT input.
The rated nominal current of the relay:
Software selectable as 1 amp or 5 amp to m
IN
of the three measured phase currents.
Neutral current, or residual current:
This results from an internal summation
I/O
ocoupled inputs and output contacts within the
Abbreviation of “Inputs and Outputs”:
Used in connection with the number of opt
relay.
I/P iation of “Input”. Abbrev
kZN ation factor:
ance elements.
The residual compens
Ensuring correct reach for ground dist
LCD
y on the relay.
Liquid crystal display:
The front-panel text displa
LD
r voltage below its set threshold.
Abbreviation of “Level Detector”:
An element responding to a current o
LED
n the relay front-panel.
Light emitting diode:
Red or green indicator o