ABB ACS800 Firmware Manual page 188

188
Index Name/Selection
30.03 EXTERNAL FAULT
NOT SEL
PAR 30.24
30.04 MOTOR THERM
PROT
FAULT
WARNING
NO
30.05 MOT THERM P
MODE
DTC
USER MODE
Actual signals and parameters
Description
Selects an interface for an External fault signal.
Inactive
External fault indication is given through pointer value in Par. 30.24.
0: Fault trip. Motor coasts to stop.
1: No External fault.
Selects how the drive reacts when the motor overtemperature is detected by
the function defined with parameter 30.05.
The drive generates a warning when the temperature exceeds the warning
level (95% of the allowed maximum value). The drive trips on a fault when the
temperature exceeds the fault level (100% of the allowed maximum value).
The drive generates a warning when the temperature exceeds the warning
level (95% of the allowed maximum value).
Inactive
Selects the thermal protection mode of the motor. When overtemperature is
detected, the drive reacts as defined with parameter 30.04.
The protection is based on the calculated motor thermal model. The following
assumptions are used in the calculation:
- The motor is at the estimated temperature (value of
TEMP EST saved at power switch off) when the power is switched on. With the
first power switch on, the motor is at the ambient temperature (30 °C).
- The motor temperature increases if it operates in the region above the load
curve and decreases if it operates below the curve.
- The motor thermal time constant is an approximate value for a standard self-
ventilated squirrel-cage motor.
It is possible to finetune the model with parameter 30.07.
Note: The model cannot be used with high power motors (parameter
higher than 800 A).
WARNING! The model does not protect the motor if it does not cool
properly due to dust and dirt.
The protection is based on the user-defined motor thermal model and the
following basic assumptions:
- The motor is at the estimated temperature (value of
TEMP EST saved at power switch off) when the power is switched on. With the
first power switch on, the motor is at the ambient temperature (30 °C).
- The motor temperature increases if it operates in the region above the motor
load curve and decreases if it operates below the curve.
The user-defined thermal model uses the motor thermal time constant
(parameter 30.06) and the motor load curve (parameters 30.07,
30.09). User tuning is typically needed only if the ambient temperature differs
from the normal operating temperature specified for the motor.
WARNING! The model does not protect the motor if it does not cool
properly due to dust and dirt.
01.37 MOTOR
99.06 is
01.37 MOTOR
30.08 and
FbEq
1
2
1
2
3
1
2