Rockwell Automation 865 Differential Protection Relay - Manual (Page 57)

Protection Functions 3-13
865-UM001A-EN-P – July 2009
Table 2.6 – Parameters of the Overcurrent Stage I> and I’> (50/51)
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. This flag is
automatically reset 5 minutes after the last
front panel push button pressing. Set
ILmax A The supervised value. Max. of IL1, IL2
and IL3
I> A Pick-up value scaled to primary value
I> xIgn Pick-up setting Set
Curve
DT
IEC
IEEE
IEEE2
RI
PrgN
Delay curve family:
Definite time
Inverse time. See “Inverse Time
Operation”.
Pre 1996
Set
Type
DT
NI
VI
EI
LTI
Parameters
Delay type.
Definite time
Inverse time. See “Inverse Time
Operation”.
Set
t> s Definite operation time (for definite time
only) Set
k> Inverse delay multiplier (for inverse time
only) Set
Dly20x s Delay at 20xIset
Dly4x s Delay at 4xIset
Dly2x s Delay at 2xIset
Dly1x s Delay at 1xIset
A, B, C, D,
E User's constants for standard equations.
Type=Parameters. See “Inverse Time
Operation”. Set
For details of setting ranges see “Protection Stages” in Chapter 10.
Set = An editable parameter (password needed)
C = Can be cleared to zero
F = Editable when force flag is on