SEF Alarm
The SEF Alarm is a facility whereby a SEF will trigger an alarm without causing a fault detection.
An SEF Alarm Definite Time delay can be configured which is independent of the SEF fault detect timing. This allows the SEF Fault Detect and Alarm functions to be operational at the same time.
SEF Alarm Configuration
SEF Protection must be available for the SEF Alarm to be used.
The SEF Alarm On/Off control is displayed in WSOS on the Control page as well as on the operator interface.
SEF Alarm Timing
There are separate SEF Alarm Definite Time settings for Trip 1 and Single Shot within each detection group.
Both settings default to 1.00 s and are configurable between 0.10 s and 999.00 s in steps of 0.01 s.
SEF Alarm settings in WSOS
In WSOS there is an SEF Alarm Definite Time setting below the SEF Detection settings on the Trip 1 and Single Shot pages. As shown below for Trip 1.
Figure 199
SEF Alarm Definite Time setting
for Trip 1
The SEF Alarm Definite Time settings can also be configured on the operator interface.
When activated, the SEF Alarm will log an event in the Event Log.
SEF Alarm On/Off events are also recorded.
The SEF Alarm can be mapped to a Status Lamp or Quick Action Key lamp on the flexVUE O.I.
The SEF Alarm is also available for mapping through the Configurable Protocol Tool for reporting via SCADA.