Definite Time Overcurrent
Description
The TeSys Tera system provides the definite time overcurrent protection when the motor is in the Start or Run state. There are two different configurable trip time delays, one for the motor start and another for the motor run state.
The definite time overcurrent protection function generates the following signals:
-
Alarm: Any of the three-phase currents of the motor goes above alarm level.
-
Trip during the motor Start state: Any of the three-phase currents of the motor goes above the pickup level for the specified motor start time delay.
-
Trip during the motor Run state: Any of the three-phase currents of the motor goes above the pickup level for the specified motor run time delay.
Parameter Setting
The definite time overcurrent protection function has the following configurable settings:
|
Parameter |
Setting range |
Default value |
|---|---|---|
|
Function |
|
Trip |
|
Pickup |
20–1000% of IFLC in step of 1% |
110% of IFLC |
|
Time Delay During Motor Start (Tps) |
0.1–6000.0 s in step of 0.1 s |
30 s |
|
Time Delay During Motor Run (Tpr) |
0.1–6000.0 s in step of 0.1 s |
20 s |
|
Alarm Level |
20–1000% of IFLC in step of 1% |
110% of IFLC |
|
Reset Mode |
|
DI + Reset Key |
|
Auto-Reset Delay (applicable only if Reset mode is Auto) |
0.0–6000.0 s in step of 0.1 s |
0 s |