Active Trip
While the Global Protection Settings determine if a protection pickup has occurred, the time to trip is determined by which trip is active at the time.
At any given time, a trip is active for each element. The active trip depends on whether Auto Reclose is on and if it is on, where any sequence in progress is up to.
If Auto Reclose is off, then the Single Shot trip is active. Even if Auto Reclose is on, the Single Shot trip will be active for the Single Shot Reset Time following a manual close. The Work Tag trip is always active if the Work Tag is applied.
The table below shows which trip is active when the associated settings are applied and at which point in an automatic reclose sequence. Assumes 4 Trips to Lockout.
Table 24 Active Trip Conditions
|
Active Trip |
Auto Reclose |
Work Tag |
Active when.. |
|---|---|---|---|
|
Trip 1 |
ON |
OFF |
No sequence is in progress. |
|
Trip 2 |
ON |
OFF |
Sequence has advanced one trip. |
|
Trip 3 |
ON |
OFF |
Sequence has advanced two trips. |
|
Trip 4 |
ON |
OFF |
Sequence has advanced three trips. |
|
Single Shot |
OFF |
OFF |
Always |
|
ON |
OFF |
For SS Reset Time following a manual close. |
|
|
Work Tag |
ON or OFF |
ON |
Always |