Rockwell Automation 865 Differential Protection Relay - Manual (Page 108)

4-16 Supporting
Functions
865-UM001A-EN-P – July 2009
Combined Overcurrent Status This function is collecting faults, fault types and registered fault
currents of all enabled overcurrent stages.
Table 4.12 – Line Fault Parameters
Parameter Value Unit Description Note
IFltLas xI N Current of the latest overcurrent fault (Set)
LINE ALARM
AlrL1
AlrL2
AlrL3
0
1 Start (=alarm) status for each phase.
0=No start since alarm ClrDly
1=Start is on
OCs
0
1
Combined overcurrent start status.
AlrL1=AlrL2=AlrL3=0
AlrL1=1 orAlrL2=1 or AlrL3=1
LxAlarm
On
Off
‘On’ Event enabling for AlrL1…3
Events are enabled
Events are disabled Set
LxAlarmOff
On
Off
‘Off’ Event enabling for AlrL1…3
Events are enabled
Events are disabled Set
OCAlarm
On
Off
‘On’ Event enabling for combined o/c
starts
Events are enabled
Events are disabled Set
OCAlarmOff
On
Off
‘Off’ Event enabling for combined o/c
starts
Events are enabled
Events are disabled Set
IncFltEvnt
On
Off
Disabling several start and trip events of
the same fault
Several events are enabled
Several events of an increasing fault is
disabled Set
ClrDly 0 ...
65535
s Duration for active alarm status AlrL1,
Alr2, AlrL3 and Ocs Set
LINE FAULT
FltL1
FltL2
FltL3
0
1 Fault (=trip) status for each phase.
0=No fault since fault ClrDly
1=Fault is on
Oct
0
1
Combined overcurrent trip status.
FltL1=FltL2=FltL3=0
FltL1=1 orFltL2=1 or FltL3=1
Set = An editable parameter (password needed)
Used with IEC 60870-105-103 communication protocol. The alarm screen will show
the latest if it's the biggest registered fault current, too. Not used with Spabus,
because Spabus masters usually don't like to have unpaired On/Off events.
Used with SPA-bus protocol, because most SPA-bus masters do need an off-event for
each corresponding on-event.