VAMP 52 - Page 71

Technical description 2 Protection functions 2.13 Earth fault protection I0>
(
50N/51N
)
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71
Parameters of the undirectional earth fault stage
I
0
> (50N/51N)
Parameter Value Unit Description Note
Status -
Blocked
Start
Trip
Current status of the stage
F
F
TripTime s Estimated time to trip
SCntr Cumulative start counter Clr
TCntr Cumulative trip counter Clr
SetGrp 1 or 2 Active setting group Set
SGrpDI
-
DIx
VIx
LEDx
VOx
Digital signal to select the
active setting group
None
Digital input
Virtual input
LED indicator signal
Virtual output
Set
Force Off
On
Force flag for status forcing
for test purposes. This is a
common flag for all stages and
output relays, too.
Automatically reset by a 5-
minute timeout.
Set
Io
IoCalc
IoPeak
pu
The supervised value
according the parameter
"Input" below.
Io> A
Pick-up value scaled to
primary value
Io> pu
Pick-up setting relative to the
parameter "Input" and the
corresponding CT value
Set
Curve
DT
IEC
IEEE
IEEE2
RI
PrgN
Delay curve family:
Definite time
Inverse time. See chapter
2.23.
Set
Type
DT
NI
VI
EI
LTI
Paramet
ers
Delay type.
Definite time
Inverse time. See chapter
2.23.
Set
t> s
Definite operation time (for
definite time only)
Set