ABB ACS 160 User Manual page 89

Code Description
3015 UNDERLOAD CURVE
This parameter provides five selectable curves shown in Figure 17. If the load drops below the set curve for
longer than the time set by parameter 3014, the underload protection is activated. Curves 1...3 reach
maximum at the motor rated frequency set by parameter 9907
3022 AI1 FLT LIMIT
Fault level for analogue input 1 supervision.
See parameter 3001
3023 AI2 FLT LIMIT
Fault level for analogue input 2 supervision.
See parameter 3001
3024 MOT THERM MODE
2 =
USER MODE
In this mode the user can define the operation of thermal protection by setting parameters 3005
, 3006
THERM TIME
3 =
THERMISTOR
Motor thermal protection is activated with an I/O signal based on motor thermistor. This mode requires a
motor thermistor or break contact of a thermistor relay connected to terminal X4. See Reference Section O.
When overtemperature is detected, the drive stops if the parameter 3004
( ).
FAULT
Figure 16 Thermal protection trip times when parameters 3005
and 3007
CURVE ZERO SPEED LOAD
ACS 160 User's Manual
< .
AI MIN FUNCTION
< .
AI MIN FUNCTION
, 3007
MOT LOAD CURVE
I / I
O N
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 0.2 0.4 0.6
I = output current
O
I = nominal current of the motor
N
f = output frequency
O
f = break point frequency (parameter 3008
BRK
have default values.
MOTOR NOM FREQ
and 3008
ZERO SPEED LOAD
Trip time
60 s
90 s
180 s
300 s
600 s
∞
0.8 1.0 1.2
.
.
BREAK POINT
MOTOR THERM PROT
f / f
O BRK
BREAK POINT
, 3006
MOT THERM TIME
MOTOR
is set to 1
)
MOT LOAD
79