Table of Contents
Advertisement
3-34
Protection Functions
857-UM001A-EN-P – July 2009
Table 3.19 – Parameters of the Undirectional Earth Fault Stage I
I
>>>> (50N/51N)
0
Parameter
Value
Status
-
Blocked
Start
Trip
TripTime
SCntr
TCntr
SetGrp
1 or 2
SGrpDI
-
DIx
VIx
LEDx
VOx
Force
Off
On
Io
Io2
IoCalc
Io>>
Io>>>
Io>>>>
Io>>
Io>>>
Io>>>>
t>
Input
Io1
Io2
IoCalc
I'oCalc
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
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.
Automatically reset by a 5-minute
timeout.
pu
The supervised value according the
parameter "Input" below.
A
Pick-up value scaled to primary value
pu
Pick-up setting relative to the parameter
"Input" and the corresponding CT value
s
Definite operation time (for definite time
only)
X1-7&8. See Chapter 9
X1-9&10
IL1 + IL2 + IL3
I'L1 + I'L2 + I'L3
>>, I
>>>,
0
0
Note
F
F
Clr
Clr
Set
Set
Set
Set
Set
Set
Advertisement
Table of Contents
