Configuration
Once this feature has been enabled, the operator will be able to configure the actions required for each protection element, either OFF, Alarm or Trip.
These options are available for the following Protection elements:
-
Phase Overcurrent
-
EF
-
SEF
-
NPS
The additional settings are displayed on the WSOS Control page shown in the Figure 126.
Figure 126
WSOS Per Element Protection
Per Element Protection can also be configured on the operator interface.
The table below explains the changes that occur with the protection elements affected when Per Element Protection is enabled. It assumes that Protection is ON, Sensitive EF Protection is available, Sequence Components are available and NPS OFF is allowed.
Table 27 Per Element Protection Available/Not Available
|
Element |
Per Element Protection Not Available |
Per Element Protection Available |
|---|---|---|
|
Phase |
Phase protection is always On (when Protection is ON). |
Phase protection can be ON (Trip), Off or Alarm. |
|
Earth |
EF protection can be ON (Trip) or OFF. |
EF protection can be ON (Trip), OFF or Alarm. |
|
SEF |
SEF protection can be ON (Trip) or OFF. |
SEF protection can be ON (Trip), OFF or Alarm. |
|
SEF Alarm |
SEF Alarm can be ON or OFF. |
SEF Alarm can be ON or OFF. (no change) |
|
NPS |
NPS protection can be ON (Trip), OFF or Alarm. |
NPS protection can be ON (Trip), OFF or Alarm. (no change) |