Jam
The Jam function detects when a motor is jammed during the Run state. The motor either stops or is suddenly overloaded and draws excessive current.
If enabled, this protection function performs the following when the motor is in the Run state:
-
Signals a Jam Alarm when the maximum phase current (Imax) exceeds the specified Jam Alarm Level
-
Triggers a Jam Trip when the maximum phase current (Imax) exceeds the specified Jam Trip Level for a time longer than the specified Jam Trip Delay
Jam Trip and Alarm
|
I1 |
Phase 1 Current |
I2 |
Phase 2 Current |
|
I3 |
Phase 3 Current |
T |
Jam Trip Delay |
|
A |
Imax |
B |
Run State |
|
C |
Imax ≥ Jam Alarm Level |
D |
Imax ≥ Jam Trip Level |
|
E |
Jam Alarm |
F |
Jam Trip |