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3-8
Protection Functions
857-UM001A-EN-P – July 2009
Table 3.2 – Parameters of the Overcurrent Stage I> (50/51)
Parameter
Value
Status
-
Blocked
Start
Trip
TripTime
SCntr
TCntr
SetGrp
1 or 2
SGrpDI
-
DIx
VIx
LEDx
VOx
Force
Off
On
ILmax
I>
I>
Curve
DT
IEC
IEEE
IEEE2
RI
PrgN
Type
DT
NI
VI
EI
LTI
Parameters
t>
k>
Dly20x
Dly4x
Dly2x
Dly1x
A, B, C, D,
E
For details of setting ranges see "Protection Stages".
Set = An editable parameter (password needed)
C = Can be cleared to zero
F = Editable when force flag is on
Unit
Description
Current status of the stage
s
Estimated time to trip
Cumulative start counter
Cumulative trip counter
Active setting group
Digital signal to select the active setting group
None
Digital input
Virtual input
LED indicator signal
Virtual output
Force flag for status forcing for test purposes.
This is a common flag for all stages and
output relays, too. This flag is automatically
reset 5 minutes after the last front panel push
button pressing.
A
The supervised value. Max. of IL1, IL2 and
IL3
A
Pick-up value scaled to primary value
xImode
Pick-up setting
Delay curve family:
Definite time
Inverse time. See "Inverse Time Operation".
Pre 1996
Delay type.
Definite time
Inverse time. See "Inverse Time Operation".
s
Definite operation time (for definite time only)
Inverse delay multiplier (for inverse time only)
s
Delay at 20xIset
s
Delay at 4xIset
s
Delay at 2xIset
s
Delay at 1xIset
User's constants for standard equations.
Type=Parameters. See "Inverse Time
Operation".
Note
F
F
Clr
Clr
Set
Set
Set
Set
Set
Set
Set
Set
Set
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