ABB ACS350 User Manual page 197

Parameters – complete descriptions
Index Name/Selection
DI5
DI1(INV)
DI2(INV)
DI3(INV)
DI4(INV)
DI5(INV)
3004 EXTERNAL FAULT 2
3005 MOT THERM PROT
NOT SEL
FAULT
ALARM
3006 MOT THERM TIME
256...9999 s
Description
See selection DI1.
External fault indication through inverted digital input DI1. 0: Fault trip (EXT
FAULT 1). Motor coasts to stop. 1: No external fault.
See selection DI1(INV).
See selection DI1(INV).
See selection DI1(INV).
See selection DI1(INV).
Selects an interface for an external fault 2 signal.
See parameter 3003 EXTERNAL FAULT 1.
Selects how the drive reacts when the motor overtemperature is detected.
Protection is inactive.
The drive trips on fault MOT OVERTEMP when the temperature exceeds
110°C, and the motor coasts to a stop.
The drive generates alarm MOTOR TEMP when the motor temperature
exceeds 90°C.
Defines the thermal time constant for the motor thermal model, i.e. the time
within the motor temperature has reached 63% of the nominal temperature
with steady load.
For thermal protection according to UL requirements for NEMA class motors,
use the rule of thumb: Motor thermal time = 35 · t6. t6 (in seconds) is
specified by the motor manufacturer as the time the motor can safely operate
at six times its rated current.
Thermal time for a Class 10 trip curve is 350 s, for a Class 20 trip curve 700
s, and for a Class 30 trip curve 1050 s.
Motor load
Temp. rise
100%
63%
Time constant
t
Par. 3006
Actual signals and parameters
Def, FbEq
5
-1
-2
-3
-4
-5
NOT SEL
FAULT
0
1
2
500
t
1 = 1 s
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