ABB ACS880 Firmware Manual page 60

60 ESP program features
52.50
35.00
17.50
0
15.80
Some typical overload recovery sequence scenarios.
Se- Operation
quence
1 Normal operation → Overload → Back to normal at recovery speed → Original speed
2 Overload → Not ok at recovery speed → Original speed, but overload warning is
active
3 Underload → Not ok at recovery speed → Trip to fault
If the condition continues after the overload recovery sequence is complete, the
drive generates a warning or a trip.
The figure below illustrates various scenarios with overload ride through recovery
sequence.
Load signal / Limit
Reference
Overload recovery speed Hz
Overload delay
Overload act
Overload save speed active
Warning
Fault
Shutdown
Current spike above limit
25.80
Recovery - Warning
(not recovered)
Delay Overload safe
time speed time
Automatic safe
speed reaction
45.80
35.8
Delay
time
Fault trip
55.82
Recovery - Warning
(recovered)
Overload safe
speed time